The-Homebrew-Cloud/Genesis-Plus-GX
2
0
Fork 0
mirror of https://github.com/ekeeke/Genesis-Plus-GX.git synced 2024-09-10 16:53:15 +02:00
Code Issues Packages Projects Releases Wiki Activity

improved HBLANK flag occurence timing (fixes Mega Turrican Sky level)

Browse Source 
improved emulation of CRAM writes during HBLANK
improved Wii RESET button behavior ("true" MD soft-reset)
This commit is contained in:
ekeeke31 2009-09-30 17:11:24 +00:00
parent cccd71e612
commit 45756f6b14
7 changed files with 73 additions and 65 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
source/genesis.c
View File

@ -149,10 +149,6 @@ void gen_reset(uint32 hard_reset)
}
resetline = -1;
#ifdef NGC
/* register SOFTRESET */
SYS_SetResetCallback(set_softreset);
#endif
/* reset CPUs */
m68k_pulse_reset();

43
source/gx/gx_input.c
View File

@ -157,14 +157,20 @@ static void pad_config(int chan, int max_keys)
static void pad_update(s8 chan, u8 i)
{
/* get PAD status */
/* PAD status */
u16 p = PAD_ButtonsHeld(chan);
s8 x = PAD_StickX (chan);
s8 y = PAD_StickY (chan);
u16 p = PAD_ButtonsHeld(chan);
/* Soft RESET */
if ((p & PAD_TRIGGER_L) && (p & PAD_TRIGGER_Z))
if (p & PAD_TRIGGER_Z)
{
/* Menu Request */
ConfigRequested = 1;
return;
}
else if ((p & PAD_TRIGGER_L) && (p & PAD_TRIGGER_Z))
{
/* Soft RESET */
set_softreset();
}
@ -428,13 +434,19 @@ static void wpad_update(s8 chan, u8 i, u32 exp)
/* WPAD data */
WPADData *data = WPAD_Data(chan);
/* WPAD buttons */
/* WPAD held buttons */
u32 p = data->btns_h;
/* Soft RESET */
if (((p & WPAD_CLASSIC_BUTTON_PLUS) && (p & WPAD_CLASSIC_BUTTON_MINUS)) ||
((p & WPAD_BUTTON_PLUS) && (p & WPAD_BUTTON_MINUS)))
if ((p & WPAD_BUTTON_HOME) || (p & WPAD_CLASSIC_BUTTON_HOME))
{
/* Menu Request */
ConfigRequested = 1;
return;
}
else if (((p & WPAD_BUTTON_PLUS) && (p & WPAD_BUTTON_MINUS)) ||
((p & WPAD_CLASSIC_BUTTON_PLUS) && (p & WPAD_CLASSIC_BUTTON_MINUS)))
{
/* Soft RESET */
set_softreset();
}
@ -712,18 +724,11 @@ void gx_input_UpdateEmu(void)
WPAD_ScanPads();
#endif
/* Menu Request */
if (PAD_ButtonsHeld(0) & PAD_TRIGGER_Z)
{
ConfigRequested = 1;
return;
}
#ifdef HW_RVL
if ((WPAD_ButtonsHeld(0) & WPAD_BUTTON_HOME) || (WPAD_ButtonsHeld(0) & WPAD_CLASSIC_BUTTON_HOME))
if (SYS_ResetButtonDown())
{
ConfigRequested = 1;
return;
/* Soft RESET */
set_softreset();
}
#endif

3
source/gx/gx_input.h
View File

@ -34,9 +34,6 @@
/* Genesis controller keys */
#define MAX_KEYS 8
/* Genesis Plus wrapper */
#define update_input() gx_input_UpdateEmu()
/* Key configuration structure */
typedef struct
{

2
source/gx/osd.h
View File

@ -38,6 +38,8 @@
#define VERSION "version 1.3.XG"
#endif
#define osd_input_Update() gx_input_UpdateEmu()
/* globals */
extern void error(char *format, ...);
extern void ClearGGCodes();

44
source/render.c
View File

@ -982,12 +982,12 @@ static void render_bg(uint32 line, uint32 width)
uint32 end = width >> 4;
#ifdef LSB_FIRST
uint32 shift = (xscroll >> 16) & 0x0F;
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
uint32 shift = (xscroll >> 16) & 0x0F;
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
uint32 v_line = (line + ((yscroll >> 16) & 0x3FF)) & pf_row_mask;
#else
uint32 shift = (xscroll & 0x0F);
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
uint32 shift = (xscroll & 0x0F);
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
uint32 v_line = (line + (yscroll & 0x3FF)) & pf_row_mask;
#endif
@ -1035,12 +1035,12 @@ static void render_bg(uint32 line, uint32 width)
end = clip[0].right;
#ifdef LSB_FIRST
shift = (xscroll & 0x0F);
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
shift = (xscroll & 0x0F);
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
v_line = (line + (yscroll & 0x3FF)) & pf_row_mask;
#else
shift = (xscroll >> 16) & 0x0F;
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
shift = (xscroll >> 16) & 0x0F;
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
v_line = (line + ((yscroll >> 16) & 0x3FF)) & pf_row_mask;
#endif
@ -1103,11 +1103,11 @@ static void render_bg_vs(uint32 line, uint32 width)
uint32 end = width >> 4;
#ifdef LSB_FIRST
uint32 shift = (xscroll >> 16) & 0x0F;
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
uint32 shift = (xscroll >> 16) & 0x0F;
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
#else
uint32 shift = (xscroll & 0x0F);
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
uint32 shift = (xscroll & 0x0F);
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
#endif
uint32 v_line, *nt;
@ -1203,7 +1203,7 @@ static void render_bg_vs(uint32 line, uint32 width)
v_line = (line + (vs[column] & 0x3FF)) & pf_row_mask;
#else
v_line = (line + ((vs[column] >> 16) & 0x3FF)) & pf_row_mask;
#endif
#endif
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & pf_y_mask)];
v_line = (v_line & 7) << 3;
@ -1215,7 +1215,7 @@ static void render_bg_vs(uint32 line, uint32 width)
start = clip[1].left;
end = clip[1].right;
}
/* Window */
if (w)
{
@ -1248,12 +1248,12 @@ static void render_bg_im2(uint32 line, uint32 width, uint32 odd)
uint32 end = width >> 4;
#ifdef LSB_FIRST
uint32 shift = (xscroll >> 16) & 0x0F;
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
uint32 shift = (xscroll >> 16) & 0x0F;
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
uint32 v_line = (line + ((yscroll >> 17) & 0x3FF)) & pf_row_mask;
#else
uint32 shift = (xscroll & 0x0F);
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
uint32 shift = (xscroll & 0x0F);
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
uint32 v_line = (line + ((yscroll >> 1) & 0x3FF)) & pf_row_mask;
#endif
@ -1299,12 +1299,12 @@ static void render_bg_im2(uint32 line, uint32 width, uint32 odd)
end = clip[0].right;
#ifdef LSB_FIRST
shift = (xscroll & 0x0F);
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
shift = (xscroll & 0x0F);
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
v_line = (line + ((yscroll >> 1) & 0x3FF)) & pf_row_mask;
#else
shift = (xscroll >> 16) & 0x0F;
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
shift = (xscroll >> 16) & 0x0F;
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
v_line = (line + ((yscroll >> 17) & 0x3FF)) & pf_row_mask;
#endif

17
source/system.c
View File

@ -257,7 +257,7 @@ int system_frame (int do_skip)
{
if (!gen_running)
{
update_input();
osd_input_Update();
return 0;
}
@ -318,10 +318,6 @@ int system_frame (int do_skip)
/* Soft Reset ? */
if (line == reset)
{
#ifdef NGC
/* wait for RESET button to be released */
while (SYS_ResetButtonDown());
#endif
/* Pro Action Replay (switch at "Trainer" position) */
if (config.lock_on == TYPE_AR)
datel_reset(0);
@ -343,10 +339,11 @@ int system_frame (int do_skip)
if ((line != 0) || (h_counter == 0)) aim_m68k += 36;
}
/* HINT will be triggered on next line, approx. 36 cycles before VDP starts line rendering */
/* during this period, any VRAM/CRAM/VSRAM writes should NOT be taken in account before next line */
/* as a result, current line is shortened */
/* fix Lotus 1, Lotus 2 RECS, Striker, Zero the Kamikaze Squirell */
/* HINT will be triggered on next line, approx. 36 cycles before VDP starts line rendering */
/* during this period, any VRAM or VSRAM writes should NOT be taken in account before next line */
/* as a result, line is rendered immediately after HINT and current line is shortened */
/* CRAM and VDP register writes that could occur during HBLANK are handled separately */
/* fix Lotus 1, Lotus 2 RECS, Striker, Skitchin, Zero the Kamikaze Squirell */
if ((line < vdp_height) && (h_counter == 0)) aim_m68k -= 36;
/* update DMA timings */
@ -359,7 +356,7 @@ int system_frame (int do_skip)
if ((line < end_line) && (!do_skip)) render_line(line, 1);
/* update inputs (doing this here fix Warriors of Eternal Sun) */
update_input();
osd_input_Update();
/* set VBLANK flag */
status |= 0x08;

25
source/vdp.c
View File

@ -430,8 +430,8 @@ unsigned int vdp_ctrl_r(void)
/* display OFF: VBLANK flag is set */
if (!(reg[1] & 0x40)) temp |= 0x8;
/* HBLANK flag (Sonic 3 and Sonic 2 "VS Modes", Lemmings 2) */
if ((count_m68k <= (line_m68k + 84)) || (count_m68k > (line_m68k + m68cycles_per_line))) temp |= 0x4;
/* HBLANK flag (Sonic 3 and Sonic 2 "VS Modes", Lemmings 2, Mega Turrican) */
if ((count_m68k <= (line_m68k + 84)) || (count_m68k > (line_m68k + m68cycles_per_line - 36))) temp |= 0x4;
/* clear pending flag */
pending = 0;
@ -616,6 +616,13 @@ static inline void data_w(unsigned int data)
*p = data;
if (index) color_update (index, *p);
if (border == index) color_update (0x00, *p);
/* CRAM modified during HBLANK */
if (!(status & 8) && (reg[1]&0x40) && (count_m68k <= (line_m68k + 84)))
{
/* remap current line (Striker) */
remap_buffer(v_counter,bitmap.viewport.w + 2*bitmap.viewport.x);
}
}
break;
}
@ -691,15 +698,19 @@ static inline void reg_w(unsigned int r, unsigned int d)
if (vdp_pal) vctab = (d & 8) ? vc_pal_240 : vc_pal_224;
}
/* Display activated/blanked during Horizontal Blanking */
/* Display enabled/blanked during "Horizontal Blanking" */
if (((d&0x40) != (reg[1]&0x40)) && !(status & 8))
{
if (count_m68k <= (hint_m68k + 120))
{
/* Redraw the current line :
- Legend of Galahad, Lemmings 2, Nigel Mansell's World Championship Racing (set display OFF)
- Deadly Moves aka Power Athlete (set display ON)
/* Fixes the following games :
- Legend of Galahad, Lemmings 2, Nigel Mansell's World Championship Racing (display OFF)
- Deadly Moves, Power Athlete (display ON)
*/
/* NB: This is not entirely correct since we are a little too tolerant with the HBLANK period limits
while still redrawing the whole line. This is done because some games appear to write this
register outside HBLANK: on real hardware, the line would appear partially blanked.
*/
reg[1] = d;
render_line(v_counter, 0);
}
@ -745,7 +756,7 @@ static inline void reg_w(unsigned int r, unsigned int d)
/* background color modified during Horizontal Blanking */
if (!(status & 8) && (count_m68k <= (line_m68k + 84)))
{
/* remap current line (see Road Rash I,II,III) */
/* remap entire line (see Road Rash I,II,III) */
reg[7] = d;
remap_buffer(v_counter,bitmap.viewport.w + 2*bitmap.viewport.x);
}