mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-13 06:15:07 +01:00
[Core/General] rewrote frame emulation timing, now starts with vertical blanking to reduce input lag by one more frame (warning: this breaks compatibility with previous savestates)
This commit is contained in:
EkeEke
parent
8744c3995f
commit
ec554b4b70
@ -51,8 +51,8 @@ int state_load(unsigned char *state)
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return 0;
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}
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/* version check (keep compatibility with previous & current state version) */
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if ((version[11] < 0x31) || (version[13] < 0x37) || (version[15] < 0x31))
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/* version check */
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if ((version[11] < 0x31) || (version[13] < 0x37) || (version[15] < 0x35))
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{
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return 0;
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}
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@ -110,7 +110,7 @@ int state_load(unsigned char *state)
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}
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/* VDP */
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bufferptr += vdp_context_load(&state[bufferptr], version[15]);
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bufferptr += vdp_context_load(&state[bufferptr]);
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/* SOUND */
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bufferptr += sound_context_load(&state[bufferptr]);
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1156
core/system.c
1156
core/system.c
File diff suppressed because it is too large
Load Diff
332
core/vdp_ctrl.c
332
core/vdp_ctrl.c
@ -46,7 +46,7 @@
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#define MARK_BG_DIRTY(addr) \
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{ \
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name = (addr >> 5) & 0x7FF; \
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if(bg_name_dirty[name] == 0) \
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if (bg_name_dirty[name] == 0) \
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{ \
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bg_name_list[bg_list_index++] = name; \
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} \
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@ -82,6 +82,7 @@ uint8 odd_frame; /* 1: odd field, 0: even field */
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uint8 im2_flag; /* 1= Interlace mode 2 is being used */
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uint8 interlaced; /* 1: Interlaced mode 1 or 2 */
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uint8 vdp_pal; /* 1: PAL , 0: NTSC (default) */
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uint8 h_counter; /* Horizontal counter */
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uint16 v_counter; /* Vertical counter */
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uint16 vc_max; /* Vertical counter overflow value */
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uint16 lines_per_frame; /* PAL: 313 lines, NTSC: 262 lines */
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@ -256,12 +257,6 @@ void vdp_reset(void)
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memset ((char *) bg_name_dirty, 0, sizeof (bg_name_dirty));
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memset ((char *) bg_name_list, 0, sizeof (bg_name_list));
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/* default HVC */
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hvc_latch = 0x10000;
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hctab = cycle2hc32;
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vc_max = vc_table[0][vdp_pal];
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v_counter = lines_per_frame - 1;
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/* default Window clipping */
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window_clip(0,0);
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@ -281,6 +276,13 @@ void vdp_reset(void)
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bitmap.viewport.ow = 256;
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bitmap.viewport.oh = 192;
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/* default HVC */
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hvc_latch = 0x10000;
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hctab = cycle2hc32;
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vc_max = vc_table[0][vdp_pal];
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v_counter = bitmap.viewport.h;
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h_counter = 0xff;
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/* default sprite pixel width */
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max_sprite_pixels = 256;
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@ -358,22 +360,11 @@ void vdp_reset(void)
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}
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}
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/* SG-1000 specific */
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if (system_hw & SYSTEM_SG)
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{
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/* no H-INT on TMS99xx */
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vdp_reg_w(10, 0xFF, 0);
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}
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/* Game Gear specific */
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else if (system_hw & SYSTEM_GG)
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{
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/* H-INT disabled on startup (fixes Terminator 2: Judgement Day) */
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vdp_reg_w(10, 0xFF, 0);
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}
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/* H-INT should be disabled on startup (fixes GG Terminator 2: Judgement Day) */
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vdp_reg_w(10, 0xFF, 0);
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/* Master System specific */
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else if ((system_hw & SYSTEM_SMS) && (!(config.bios & 1) || !(system_bios & SYSTEM_SMS)))
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if ((system_hw & SYSTEM_SMS) && (!(config.bios & 1) || !(system_bios & SYSTEM_SMS)))
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{
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/* force registers initialization (normally done by BOOT ROM on all Master System models) */
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vdp_reg_w(0 , 0x36, 0);
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@ -383,7 +374,6 @@ void vdp_reset(void)
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vdp_reg_w(4 , 0xFF, 0);
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vdp_reg_w(5 , 0xFF, 0);
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vdp_reg_w(6 , 0xFF, 0);
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vdp_reg_w(10, 0xFF, 0);
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/* Mode 4 */
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render_bg = render_bg_m4;
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@ -397,7 +387,6 @@ void vdp_reset(void)
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/* force registers initialization (normally done by BOOT ROM, only on Mega Drive model with TMSS) */
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vdp_reg_w(0 , 0x04, 0);
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vdp_reg_w(1 , 0x04, 0);
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vdp_reg_w(10, 0xFF, 0);
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vdp_reg_w(12, 0x81, 0);
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vdp_reg_w(15, 0x02, 0);
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}
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@ -427,6 +416,7 @@ int vdp_context_save(uint8 *state)
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save_param(&dmafill, sizeof(dmafill));
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save_param(&fifo_idx, sizeof(fifo_idx));
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save_param(&fifo, sizeof(fifo));
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save_param(&h_counter, sizeof(h_counter));
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save_param(&hint_pending, sizeof(hint_pending));
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save_param(&vint_pending, sizeof(vint_pending));
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save_param(&dma_length, sizeof(dma_length));
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@ -436,7 +426,7 @@ int vdp_context_save(uint8 *state)
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return bufferptr;
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}
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int vdp_context_load(uint8 *state, uint8 version)
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int vdp_context_load(uint8 *state)
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{
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int i, bufferptr = 0;
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uint8 temp_reg[0x20];
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@ -482,24 +472,10 @@ int vdp_context_load(uint8 *state, uint8 version)
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load_param(&code, sizeof(code));
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load_param(&pending, sizeof(pending));
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load_param(&status, sizeof(status));
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/* 1.7.1 state compatibility */
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if (version < 0x35)
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{
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uint16 temp;
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load_param(&temp, 2);
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dmafill = temp >> 8;
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temp &= 0xff;
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fifo_idx = 0;
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fifo[0] = fifo[1] = fifo[2] = fifo[3] = (temp << 8) | temp;
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}
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else
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{
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load_param(&dmafill, sizeof(dmafill));
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load_param(&fifo_idx, sizeof(fifo_idx));
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load_param(&fifo, sizeof(fifo));
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}
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load_param(&dmafill, sizeof(dmafill));
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load_param(&fifo_idx, sizeof(fifo_idx));
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load_param(&fifo, sizeof(fifo));
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load_param(&h_counter, sizeof(h_counter));
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load_param(&hint_pending, sizeof(hint_pending));
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load_param(&vint_pending, sizeof(vint_pending));
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load_param(&dma_length, sizeof(dma_length));
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@ -598,7 +574,7 @@ void vdp_dma_update(unsigned int cycles)
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/* NOTE: DMA timings can not change during VBLANK because active display width cannot be modified. */
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/* Indeed, writing VDP registers during DMA is either impossible (when doing DMA from 68k bus, CPU */
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/* is locked) or will abort DMA operation (in case of DMA Fill or Copy). */
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dma_cycles = (lines_per_frame * MCYCLES_PER_LINE) - cycles;
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dma_cycles = ((lines_per_frame - bitmap.viewport.h - 1) * MCYCLES_PER_LINE) - cycles;
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}
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else
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{
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@ -610,7 +586,7 @@ void vdp_dma_update(unsigned int cycles)
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dma_bytes = (dma_cycles * rate) / MCYCLES_PER_LINE;
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#ifdef LOGVDP
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error("[%d(%d)][%d(%d)] DMA type %d (%d access/line)(%d cycles left)-> %d access (%d remaining) (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE,dma_type, rate, dma_cycles, dma_bytes, dma_length, m68k_get_reg(M68K_REG_PC));
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error("[%d(%d)][%d(%d)] DMA type %d (%d access/line)(%d cycles left)-> %d access (%d remaining) (%x)\n", v_counter, (v_counter + (cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE,dma_type, rate, dma_cycles, dma_bytes, dma_length, m68k_get_reg(M68K_REG_PC));
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#endif
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/* Check if DMA can be finished before the end of current line */
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@ -948,7 +924,7 @@ void vdp_z80_ctrl_w(unsigned int data)
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/* Master System & Game Gear VDP control port specific */
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void vdp_sms_ctrl_w(unsigned int data)
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{
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if(pending == 0)
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if (pending == 0)
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{
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/* Update address register LSB */
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addr = (addr & 0x3F00) | (data & 0xFF);
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@ -1022,36 +998,10 @@ void vdp_sms_ctrl_w(unsigned int data)
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vc_max = vc_table[0][vdp_pal];
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}
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/* viewport changes should be applied on next frame */
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if (height != bitmap.viewport.h)
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{
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if (status & 8)
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{
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/* viewport changes should be applied on next frame */
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bitmap.viewport.changed |= 2;
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}
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else
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{
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/* update active display */
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bitmap.viewport.h = height;
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/* update vertical overscan */
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if (config.overscan & 1)
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{
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bitmap.viewport.y = (240 + 48*vdp_pal - height) >> 1;
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}
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else
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{
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if ((system_hw == SYSTEM_GG) && !config.gg_extra)
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{
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/* Display area reduced to 160x144 */
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bitmap.viewport.y = (144 - height) / 2;
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}
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else
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{
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bitmap.viewport.y = 0;
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}
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}
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}
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bitmap.viewport.changed |= 2;
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}
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}
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@ -1152,7 +1102,7 @@ void vdp_sms_ctrl_w(unsigned int data)
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/* SG-1000 VDP (TMS99xx) control port specific */
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void vdp_tms_ctrl_w(unsigned int data)
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{
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if(pending == 0)
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if (pending == 0)
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{
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/* Latch LSB */
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addr_latch = data;
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@ -1308,7 +1258,7 @@ unsigned int vdp_68k_ctrl_r(unsigned int cycles)
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}
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#ifdef LOGVDP
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error("[%d(%d)][%d(%d)] VDP 68k status read -> 0x%x (0x%x) (%x)\n", v_counter, cycles/MCYCLES_PER_LINE-1, cycles, cycles%MCYCLES_PER_LINE, temp, status, m68k_get_reg(M68K_REG_PC));
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error("[%d(%d)][%d(%d)] VDP 68k status read -> 0x%x (0x%x) (%x)\n", v_counter, (v_counter + (cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, temp, status, m68k_get_reg(M68K_REG_PC));
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#endif
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return (temp);
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}
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@ -1317,9 +1267,6 @@ unsigned int vdp_z80_ctrl_r(unsigned int cycles)
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{
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unsigned int temp;
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/* Cycle-accurate SOVR & VINT flags */
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int line = (lines_per_frame + (cycles / MCYCLES_PER_LINE) - 1) % lines_per_frame;
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/* Check if DMA busy flag is set (Mega Drive VDP specific) */
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if (status & 2)
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{
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@ -1332,18 +1279,31 @@ unsigned int vdp_z80_ctrl_r(unsigned int cycles)
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}
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/* Check if we are already on next line */
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if (line > v_counter)
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if ((cycles - mcycles_vdp) >= MCYCLES_PER_LINE)
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{
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v_counter = line;
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if (line == (bitmap.viewport.h + 1))
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/* check vertical position */
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if (v_counter == bitmap.viewport.h)
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{
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/* set VINT flag (immediately cleared after) */
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/* update VCounter to indicate VINT flag has been cleared & VINT should not be triggered */
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v_counter++;
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/* cycle-accurate VINT flag (immediately cleared after being read) */
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status |= 0x80;
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}
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else if ((line >= 0) && (line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special))
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else
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{
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/* render next line to check sprites overflow & collision */
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render_line(line);
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/* update line counter */
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int line = (v_counter + 1) % lines_per_frame;
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/* check if we are within active display range */
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if ((line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special & HW_3D_GLASSES))
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{
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/* update VCounter to indicate next line has already been rendered */
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v_counter = line;
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/* render next line (cycle-accurate SCOL & SOVR flags) */
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render_line(line);
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}
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}
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}
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@ -1378,7 +1338,7 @@ unsigned int vdp_z80_ctrl_r(unsigned int cycles)
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}
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/* Cycle-accurate SCOL flag */
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if ((temp & 0x20) && (line == (spr_col >> 8)))
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if ((temp & 0x20) && (v_counter == (spr_col >> 8)))
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{
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if (system_hw & SYSTEM_MD)
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{
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@ -1408,7 +1368,7 @@ unsigned int vdp_z80_ctrl_r(unsigned int cycles)
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Z80.irq_state = CLEAR_LINE;
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#ifdef LOGVDP
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error("[%d(%d)][%d(%d)] VDP Z80 status read -> 0x%x (0x%x) (%x)\n", v_counter, cycles/MCYCLES_PER_LINE-1, cycles, cycles%MCYCLES_PER_LINE, temp, status, Z80.pc.w.l);
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error("[%d(%d)][%d(%d)] VDP Z80 status read -> 0x%x (0x%x) (%x)\n", v_counter, (v_counter + (cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, temp, status, Z80.pc.w.l);
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#endif
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return (temp);
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}
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@ -1425,31 +1385,35 @@ unsigned int vdp_hvc_r(unsigned int cycles)
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/* Check if HVC latch is enabled */
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if (data)
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{
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/* Mode 5: HV-counters are frozen (cf. lightgun games, Sunset Riders logo) */
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/* Mode 5: HV counters are frozen (cf. lightgun games, Sunset Riders logo) */
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if (reg[1] & 0x04)
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{
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#ifdef LOGVDP
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error("[%d(%d)][%d(%d)] HVC latch read -> 0x%x (%x)\n", v_counter, (cycles/MCYCLES_PER_LINE-1)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, data & 0xffff, m68k_get_reg(M68K_REG_PC));
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error("[%d(%d)][%d(%d)] HVC latch read -> 0x%x (%x)\n", v_counter, (v_counter + (cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, data & 0xffff, m68k_get_reg(M68K_REG_PC));
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#endif
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/* return latched HVC value */
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return (data & 0xffff);
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}
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else
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{
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/* Mode 4: by default, V-counter runs normally & H counter is frozen */
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/* Mode 4: by default, VCounter runs normally & H counter is frozen */
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data &= 0xff;
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}
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}
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else
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{
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/* Cycle-accurate H-Counter (Striker, Mickey Mania, Skitchin, Road Rash I,II,III, Sonic 3D Blast...) */
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/* Cycle-accurate HCounter (Striker, Mickey Mania, Skitchin, Road Rash I,II,III, Sonic 3D Blast...) */
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data = hctab[cycles % MCYCLES_PER_LINE];
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}
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/* Cycle-accurate V-Counter (cycle counter starts from line -1) */
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vc = (cycles / MCYCLES_PER_LINE) - 1;
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/* Cycle-accurate VCounter */
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vc = v_counter;
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if ((cycles - mcycles_vdp) >= MCYCLES_PER_LINE)
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{
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vc = (vc + 1) % lines_per_frame;
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}
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/* V-Counter overflow */
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/* VCounter overflow */
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if (vc > vc_max)
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{
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vc -= lines_per_frame;
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@ -1465,11 +1429,11 @@ unsigned int vdp_hvc_r(unsigned int cycles)
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vc = (vc & ~1) | ((vc >> 8) & 1);
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}
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/* return H-Counter in LSB & V-Counter in MSB */
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/* return HCounter in LSB & VCounter in MSB */
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data |= ((vc & 0xff) << 8);
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#ifdef LOGVDP
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error("[%d(%d)][%d(%d)] HVC read -> 0x%x (%x)\n", v_counter, (cycles/MCYCLES_PER_LINE-1)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, data, m68k_get_reg(M68K_REG_PC));
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error("[%d(%d)][%d(%d)] HVC read -> 0x%x (%x)\n", v_counter, (v_counter + (cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, data, m68k_get_reg(M68K_REG_PC));
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#endif
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return (data);
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}
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@ -1494,11 +1458,11 @@ void vdp_test_w(unsigned int data)
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int vdp_68k_irq_ack(int int_level)
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{
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#ifdef LOGVDP
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error("[%d(%d)][%d(%d)] INT Level %d ack (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE,int_level, m68k_get_reg(M68K_REG_PC));
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error("[%d(%d)][%d(%d)] INT Level %d ack (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE,int_level, m68k_get_reg(M68K_REG_PC));
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#endif
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/* VINT has higher priority (Fatal Rewind) */
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if (vint_pending & reg[1])
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if (reg[1] & vint_pending)
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{
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#ifdef LOGVDP
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error("---> VINT cleared\n");
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@ -1509,7 +1473,7 @@ int vdp_68k_irq_ack(int int_level)
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status &= ~0x80;
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/* Update IRQ status */
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if (hint_pending & reg[0])
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if (reg[0] & hint_pending)
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{
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m68k_set_irq(4);
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||||
}
|
||||
@ -1542,7 +1506,7 @@ int vdp_68k_irq_ack(int int_level)
|
||||
static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
{
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VDP register %d write -> 0x%x (%x)\n", v_counter, cycles/MCYCLES_PER_LINE-1, cycles, cycles%MCYCLES_PER_LINE, r, d, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] VDP register %d write -> 0x%x (%x)\n", v_counter, (v_counter + (cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, cycles, cycles%MCYCLES_PER_LINE, r, d, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
|
||||
/* VDP registers #11 to #23 cannot be updated in Mode 4 (Captain Planet & Avengers, Bass Master Classic Pro Edition) */
|
||||
@ -1560,10 +1524,10 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
reg[0] = d;
|
||||
|
||||
/* Line Interrupt */
|
||||
if ((r & 0x10) && hint_pending)
|
||||
if (r & hint_pending)
|
||||
{
|
||||
/* Update IRQ status */
|
||||
if (vint_pending & reg[1])
|
||||
if (reg[1] & vint_pending)
|
||||
{
|
||||
set_irq_line(6);
|
||||
}
|
||||
@ -1726,14 +1690,14 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
}
|
||||
|
||||
/* Frame Interrupt */
|
||||
if ((r & 0x20) && vint_pending)
|
||||
if (r & vint_pending)
|
||||
{
|
||||
/* Update IRQ status */
|
||||
if (d & 0x20)
|
||||
{
|
||||
set_irq_line_delay(6);
|
||||
}
|
||||
else if (hint_pending & reg[0])
|
||||
else if (reg[0] & hint_pending)
|
||||
{
|
||||
set_irq_line(4);
|
||||
}
|
||||
@ -1797,19 +1761,6 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
vdp_68k_data_r = vdp_68k_data_r_m5;
|
||||
vdp_z80_data_r = vdp_z80_data_r_m5;
|
||||
|
||||
/* Change display height */
|
||||
if (status & 8)
|
||||
{
|
||||
/* viewport changes should be applied on next frame */
|
||||
bitmap.viewport.changed |= 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Update current frame active display height */
|
||||
bitmap.viewport.h = 224 + ((d & 8) << 1);
|
||||
bitmap.viewport.y = (config.overscan & 1) * (8 - (d & 8) + 24*vdp_pal);
|
||||
}
|
||||
|
||||
/* Clear HVC latched value */
|
||||
hvc_latch = 0;
|
||||
|
||||
@ -1844,18 +1795,6 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
vdp_68k_data_r = vdp_68k_data_r_m4;
|
||||
vdp_z80_data_r = vdp_z80_data_r_m4;
|
||||
|
||||
if (status & 8)
|
||||
{
|
||||
/* viewport changes should be applied on next frame */
|
||||
bitmap.viewport.changed |= 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Update current frame active display */
|
||||
bitmap.viewport.h = 192;
|
||||
bitmap.viewport.y = (config.overscan & 1) * 24 * (vdp_pal + 1);
|
||||
}
|
||||
|
||||
/* Latch current HVC */
|
||||
hvc_latch = vdp_hvc_r(cycles) | 0x10000;
|
||||
|
||||
@ -1872,6 +1811,9 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
|
||||
/* Update vertical counter max value */
|
||||
vc_max = vc_table[(d >> 2) & 3][vdp_pal];
|
||||
|
||||
/* Display height change should be applied on next frame */
|
||||
bitmap.viewport.changed |= 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
@ -1975,21 +1917,28 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
|
||||
case 8: /* Horizontal Scroll (Mode 4 only) */
|
||||
{
|
||||
int line;
|
||||
|
||||
/* Hscroll is latched at HCount 0xF3, HCount 0xF6 on MD */
|
||||
/* H-Scroll is latched at HCount 0xF3, HCount 0xF6 on MD */
|
||||
/* Line starts at HCount 0xF4, HCount 0xF6 on MD */
|
||||
if (system_hw < SYSTEM_MD)
|
||||
{
|
||||
cycles = cycles + 15;
|
||||
}
|
||||
|
||||
/* Make sure Hscroll has not already been latched */
|
||||
line = (lines_per_frame + (cycles / MCYCLES_PER_LINE) - 1) % lines_per_frame;
|
||||
if ((line > v_counter) && (line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special))
|
||||
/* Check if H-Scroll has already been latched */
|
||||
if ((cycles - mcycles_vdp) >= MCYCLES_PER_LINE)
|
||||
{
|
||||
v_counter = line;
|
||||
render_line(line);
|
||||
/* update line counter */
|
||||
int line = (v_counter + 1) % lines_per_frame;
|
||||
|
||||
/* check if we are within active display range */
|
||||
if ((line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special & HW_3D_GLASSES))
|
||||
{
|
||||
/* update VCounter to indicate next line has already been rendered */
|
||||
v_counter = line;
|
||||
|
||||
/* render next line before updating H-Scroll */
|
||||
render_line(line);
|
||||
}
|
||||
}
|
||||
|
||||
reg[8] = d;
|
||||
@ -2067,8 +2016,8 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
/* Update clipping */
|
||||
window_clip(reg[17], 1);
|
||||
|
||||
/* Max. sprite pixels per line */
|
||||
max_sprite_pixels = 320;
|
||||
/* Update active display width & max sprite pixels per line*/
|
||||
max_sprite_pixels = bitmap.viewport.w = 320;
|
||||
}
|
||||
else
|
||||
{
|
||||
@ -2084,33 +2033,16 @@ static void vdp_reg_w(unsigned int r, unsigned int d, unsigned int cycles)
|
||||
/* Update clipping */
|
||||
window_clip(reg[17], 0);
|
||||
|
||||
/* Max. sprite pixels per line */
|
||||
max_sprite_pixels = 256;
|
||||
/* Update active display width & max sprite pixels per line*/
|
||||
max_sprite_pixels = bitmap.viewport.w = 256;
|
||||
}
|
||||
|
||||
/* Active display width modified during HBLANK (Bugs Bunny Double Trouble) */
|
||||
if ((v_counter < bitmap.viewport.h) && (cycles <= (mcycles_vdp + 860)))
|
||||
if ((v_counter < bitmap.viewport.h) && (reg[1] & 0x40) && (cycles <= (mcycles_vdp + 860)))
|
||||
{
|
||||
/* Update active display width */
|
||||
bitmap.viewport.w = 256 + ((d & 1) << 6);
|
||||
|
||||
/* Redraw entire line */
|
||||
render_line(v_counter);
|
||||
}
|
||||
else if (v_counter == (lines_per_frame - 1))
|
||||
{
|
||||
/* Update starting frame active display width */
|
||||
bitmap.viewport.w = 256 + ((d & 1) << 6);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Changes should be applied on next frame (Golden Axe III intro) */
|
||||
/* NB: not 100% accurate but required since backend framebuffer width cannot be modified mid-frame. */
|
||||
/* This would require a fixed framebuffer width (based on TV screen aspect ratio) and pixel scaling */
|
||||
/* to be done during rendering (depending on active display pixel aspect ratio in H32 or H40 mode). */
|
||||
/* Display is generally disabled when this is modified so it shouldn't be really noticeable anyway. */
|
||||
bitmap.viewport.changed |= 2;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
@ -2183,16 +2115,16 @@ static void vdp_fifo_update(unsigned int cycles)
|
||||
if (reg[12] & 0x01)
|
||||
{
|
||||
fifo_timing = fifo_cycles_h40;
|
||||
slots = 18 * (cycles / MCYCLES_PER_LINE);
|
||||
slots = 18 * ((v_counter + 1) % lines_per_frame);
|
||||
}
|
||||
else
|
||||
{
|
||||
fifo_timing = fifo_cycles_h32;
|
||||
slots = 16 * (cycles / MCYCLES_PER_LINE);
|
||||
slots = 16 * ((v_counter + 1) % lines_per_frame);
|
||||
}
|
||||
|
||||
/* number of access slots within current line */
|
||||
cycles = cycles % MCYCLES_PER_LINE;
|
||||
cycles -= mcycles_vdp;
|
||||
while (fifo_timing[count] <= cycles)
|
||||
{
|
||||
count++;
|
||||
@ -2275,7 +2207,7 @@ static void vdp_bus_w(unsigned int data)
|
||||
}
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2311,14 +2243,14 @@ static void vdp_bus_w(unsigned int data)
|
||||
}
|
||||
|
||||
/* CRAM modified during HBLANK (Striker, Zero the Kamikaze, etc) */
|
||||
if ((v_counter < bitmap.viewport.h) && (reg[1]& 0x40) && (m68k.cycles <= (mcycles_vdp + 860)))
|
||||
if ((v_counter < bitmap.viewport.h) && (reg[1] & 0x40) && (m68k.cycles <= (mcycles_vdp + 860)))
|
||||
{
|
||||
/* Remap current line */
|
||||
remap_line(v_counter);
|
||||
}
|
||||
}
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x write -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2333,12 +2265,12 @@ static void vdp_bus_w(unsigned int data)
|
||||
/* VSRAM writes during HBLANK (Adventures of Batman & Robin) */
|
||||
if ((v_counter < bitmap.viewport.h) && (reg[1] & 0x40) && (m68k.cycles <= (mcycles_vdp + 860)))
|
||||
{
|
||||
/* Remap current line */
|
||||
/* Redraw entire line */
|
||||
render_line(v_counter);
|
||||
}
|
||||
}
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VSRAM 0x%x write -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] VSRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2348,7 +2280,7 @@ static void vdp_bus_w(unsigned int data)
|
||||
/* add some delay until 68k periodical wait-states are accurately emulated ("Clue", "Microcosm") */
|
||||
m68k.cycles += 2;
|
||||
#ifdef LOGERROR
|
||||
error("[%d(%d)][%d(%d)] Invalid (%d) 0x%x write -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, code, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] Invalid (%d) 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, code, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2392,7 +2324,7 @@ static void vdp_68k_data_w_m4(unsigned int data)
|
||||
m68k.cycles = fifo_cycles;
|
||||
|
||||
/* Update FIFO access slot counter */
|
||||
fifo_slots = fifo_slots + 1 + fifo_byte_access;
|
||||
fifo_slots += (fifo_byte_access + 1);
|
||||
}
|
||||
}
|
||||
|
||||
@ -2484,7 +2416,7 @@ static void vdp_68k_data_w_m5(unsigned int data)
|
||||
m68k.cycles = fifo_cycles;
|
||||
|
||||
/* Update FIFO access slot counter */
|
||||
fifo_slots += (1 + fifo_byte_access);
|
||||
fifo_slots += (fifo_byte_access + 1);
|
||||
}
|
||||
}
|
||||
|
||||
@ -2542,7 +2474,7 @@ static unsigned int vdp_68k_data_r_m5(void)
|
||||
data = *(uint16 *)&vram[addr & 0xFFFE];
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x read -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x read -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2566,7 +2498,7 @@ static unsigned int vdp_68k_data_r_m5(void)
|
||||
data |= (fifo[fifo_idx] & ~0x7FF);
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VSRAM 0x%x read -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] VSRAM 0x%x read -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2583,7 +2515,7 @@ static unsigned int vdp_68k_data_r_m5(void)
|
||||
data |= (fifo[fifo_idx] & ~0xEEE);
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x read -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x read -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2597,7 +2529,7 @@ static unsigned int vdp_68k_data_r_m5(void)
|
||||
data |= (fifo[fifo_idx] & ~0xFF);
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] 8-bit VRAM 0x%x read -> 0x%x (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] 8-bit VRAM 0x%x read -> 0x%x (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, addr, data, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2606,7 +2538,7 @@ static unsigned int vdp_68k_data_r_m5(void)
|
||||
{
|
||||
/* Invalid code value (normally locks VDP, hard reset required) */
|
||||
#ifdef LOGERROR
|
||||
error("[%d(%d)][%d(%d)] Invalid (%d) 0x%x read (%x)\n", v_counter, m68k.cycles/MCYCLES_PER_LINE-1, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, code, addr, m68k_get_reg(M68K_REG_PC));
|
||||
error("[%d(%d)][%d(%d)] Invalid (%d) 0x%x read (%x)\n", v_counter, (v_counter + (m68k.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, m68k.cycles, m68k.cycles%MCYCLES_PER_LINE, code, addr, m68k_get_reg(M68K_REG_PC));
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
@ -2870,12 +2802,20 @@ static void vdp_z80_data_w_ms(unsigned int data)
|
||||
int index;
|
||||
|
||||
/* Check if we are already on next line */
|
||||
int line = (lines_per_frame + (Z80.cycles / MCYCLES_PER_LINE) - 1) % lines_per_frame;
|
||||
if ((line > v_counter) && (line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special))
|
||||
if ((Z80.cycles - mcycles_vdp) >= MCYCLES_PER_LINE)
|
||||
{
|
||||
/* Render next line */
|
||||
v_counter = line;
|
||||
render_line(line);
|
||||
/* update line counter */
|
||||
int line = (v_counter + 1) % lines_per_frame;
|
||||
|
||||
/* check if we are within active display range */
|
||||
if ((line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special & HW_3D_GLASSES))
|
||||
{
|
||||
/* update VCounter to indicate next line has already been rendered */
|
||||
v_counter = line;
|
||||
|
||||
/* render next line */
|
||||
render_line(line);
|
||||
}
|
||||
}
|
||||
|
||||
/* VRAM address */
|
||||
@ -2890,7 +2830,7 @@ static void vdp_z80_data_w_ms(unsigned int data)
|
||||
}
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, Z80.cycles/MCYCLES_PER_LINE-1, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, index, data, Z80.pc.w.l);
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (Z80.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, index, data, Z80.pc.w.l);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
@ -2917,7 +2857,7 @@ static void vdp_z80_data_w_ms(unsigned int data)
|
||||
}
|
||||
}
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x write -> 0x%x (%x)\n", v_counter, Z80.cycles/MCYCLES_PER_LINE-1, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, addr, data, Z80.pc.w.l);
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (Z80.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, addr, data, Z80.pc.w.l);
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -2937,13 +2877,21 @@ static void vdp_z80_data_w_gg(unsigned int data)
|
||||
{
|
||||
int index;
|
||||
|
||||
/* Check if we are already on next line*/
|
||||
int line = (lines_per_frame + (Z80.cycles / MCYCLES_PER_LINE) - 1) % lines_per_frame;
|
||||
if ((line > v_counter) && (line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special))
|
||||
/* Check if we are already on next line */
|
||||
if ((Z80.cycles - mcycles_vdp) >= MCYCLES_PER_LINE)
|
||||
{
|
||||
/* Render next line */
|
||||
v_counter = line;
|
||||
render_line(line);
|
||||
/* update line counter */
|
||||
int line = (v_counter + 1) % lines_per_frame;
|
||||
|
||||
/* check if we are within active display range */
|
||||
if ((line < bitmap.viewport.h) && !(work_ram[0x1ffb] & cart.special & HW_3D_GLASSES))
|
||||
{
|
||||
/* update VCounter to indicate next line has already been rendered */
|
||||
v_counter = line;
|
||||
|
||||
/* render next line */
|
||||
render_line(line);
|
||||
}
|
||||
}
|
||||
|
||||
/* VRAM address */
|
||||
@ -2957,7 +2905,7 @@ static void vdp_z80_data_w_gg(unsigned int data)
|
||||
MARK_BG_DIRTY(index);
|
||||
}
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, Z80.cycles/MCYCLES_PER_LINE-1, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, index, data, Z80.pc.w.l);
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (Z80.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, index, data, Z80.pc.w.l);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
@ -2995,7 +2943,7 @@ static void vdp_z80_data_w_gg(unsigned int data)
|
||||
cached_write = data;
|
||||
}
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x write -> 0x%x (%x)\n", v_counter, Z80.cycles/MCYCLES_PER_LINE-1, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, addr, data, Z80.pc.w.l);
|
||||
error("[%d(%d)][%d(%d)] CRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (Z80.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, addr, data, Z80.pc.w.l);
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -3021,7 +2969,7 @@ static void vdp_z80_data_w_sg(unsigned int data)
|
||||
addr++;
|
||||
|
||||
#ifdef LOGVDP
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, Z80.cycles/MCYCLES_PER_LINE-1, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, index, data, Z80.pc.w.l);
|
||||
error("[%d(%d)][%d(%d)] VRAM 0x%x write -> 0x%x (%x)\n", v_counter, (v_counter + (Z80.cycles - mcycles_vdp)/MCYCLES_PER_LINE)%lines_per_frame, Z80.cycles, Z80.cycles%MCYCLES_PER_LINE, index, data, Z80.pc.w.l);
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
@ -70,6 +70,7 @@ extern uint8 odd_frame;
|
||||
extern uint8 im2_flag;
|
||||
extern uint8 interlaced;
|
||||
extern uint8 vdp_pal;
|
||||
extern uint8 h_counter;
|
||||
extern uint16 v_counter;
|
||||
extern uint16 vc_max;
|
||||
extern uint16 vscroll;
|
||||
@ -90,7 +91,7 @@ extern unsigned int (*vdp_z80_data_r)(void);
|
||||
extern void vdp_init(void);
|
||||
extern void vdp_reset(void);
|
||||
extern int vdp_context_save(uint8 *state);
|
||||
extern int vdp_context_load(uint8 *state, uint8 version);
|
||||
extern int vdp_context_load(uint8 *state);
|
||||
extern void vdp_dma_update(unsigned int cycles);
|
||||
extern void vdp_68k_ctrl_w(unsigned int data);
|
||||
extern void vdp_z80_ctrl_w(unsigned int data);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user