mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-26 11:11:48 +01:00
additional memory handler code cleanup
This commit is contained in:
ekeeke31
parent
79d5f55611
commit
682dd53a38
@ -26,7 +26,6 @@ of samples per frame and keeping PSG & FM chips in sync.
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* added support for CRAM writes during horizontal blanking (Striker, Zero the Kamikaze Squirrel,...)
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* added support for 2-Cell vertical scrolling in Interlaced 2 mode
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* added proper HV Counter latch support (fixes Sunset Riders intro)
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* fixed left-most column vertical scrolling when horizontally scrolled (Gynoug, F1)
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* improved VDP FIFO timings accuracy: fixes Sol Deace intro
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* improved sprite masking accuracy (thanks to Nemesis for his sprite test program)
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* improved HBLANK flag timing accuracy: fixes Mega Turrican (Sky level)
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@ -52,7 +51,8 @@ of samples per frame and keeping PSG & FM chips in sync.
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* added Action Replay hardware emulation (Action replay ROM is now fully supported).
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* added S&K "Lock-On" hardware emulation (you can "lock" any games to Sonic & Knuckles).
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* added Cartridge "hot swap" feature.
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* added EEPROM support in some games requiring it.
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* added missing EEPROM support in some games.
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* added accurate TMSS emulation (VDP lock-out)
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* fixed Realtec mapper emulation: fixes missing sound in Balloon Boy / Funny World.
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* fixed lightgun auto-detection: fixes default cursor position in Lethal Enforcers II.
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* lots of code cleanup, bugfixes & optimization.
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131
source/mem68k.c
131
source/mem68k.c
@ -28,7 +28,7 @@
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/*--------------------------------------------------------------------------*/
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/* Unused area (return open bus data, i.e prefetched instruction word) */
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/*--------------------------------------------------------------------------*/
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uint32 m68k_read_bus_8(uint32 address)
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unsigned int m68k_read_bus_8(unsigned int address)
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{
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#ifdef LOGERROR
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error("Unused read8 %08X (%08X)\n", address, m68k_get_reg (NULL, M68K_REG_PC));
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@ -36,7 +36,7 @@ uint32 m68k_read_bus_8(uint32 address)
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return m68k_read_pcrelative_8(REG_PC | (address & 1));
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}
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uint32 m68k_read_bus_16(uint32 address)
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unsigned int m68k_read_bus_16(unsigned int address)
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{
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#ifdef LOGERROR
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error("Unused read16 %08X (%08X)\n", address, m68k_get_reg (NULL, M68K_REG_PC));
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@ -45,14 +45,14 @@ uint32 m68k_read_bus_16(uint32 address)
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}
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void m68k_unused_8_w (uint32 address, uint32 data)
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void m68k_unused_8_w (unsigned int address, unsigned int data)
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{
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#ifdef LOGERROR
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error("Unused write8 %08X = %02X (%08X)\n", address, data, m68k_get_reg (NULL, M68K_REG_PC));
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#endif
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}
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void m68k_unused_16_w (uint32 address, uint32 data)
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void m68k_unused_16_w (unsigned int address, unsigned int data)
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{
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#ifdef LOGERROR
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error("Unused write16 %08X = %04X (%08X)\n", address, data, m68k_get_reg (NULL, M68K_REG_PC));
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@ -63,7 +63,7 @@ void m68k_unused_16_w (uint32 address, uint32 data)
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/*--------------------------------------------------------------------------*/
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/* Illegal area (cause system to lock-up since !DTACK is not returned) */
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/*--------------------------------------------------------------------------*/
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void m68k_lockup_w_8 (uint32 address, uint32 data)
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void m68k_lockup_w_8 (unsigned int address, unsigned int data)
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{
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#ifdef LOGERROR
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error ("Lockup %08X = %02X (%08X)\n", address, data, m68k_get_reg (NULL, M68K_REG_PC));
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@ -74,7 +74,7 @@ void m68k_lockup_w_8 (uint32 address, uint32 data)
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}
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}
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void m68k_lockup_w_16 (uint32 address, uint32 data)
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void m68k_lockup_w_16 (unsigned int address, unsigned int data)
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{
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#ifdef LOGERROR
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error ("Lockup %08X = %04X (%08X)\n", address, data, m68k_get_reg (NULL, M68K_REG_PC));
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@ -85,7 +85,7 @@ void m68k_lockup_w_16 (uint32 address, uint32 data)
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}
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}
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uint32 m68k_lockup_r_8 (uint32 address)
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unsigned int m68k_lockup_r_8 (unsigned int address)
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{
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#ifdef LOGERROR
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error ("Lockup %08X.b (%08X)\n", address, m68k_get_reg (NULL, M68K_REG_PC));
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@ -97,7 +97,7 @@ uint32 m68k_lockup_r_8 (uint32 address)
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return m68k_read_pcrelative_8(REG_PC | (address & 1));
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}
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uint32 m68k_lockup_r_16 (uint32 address)
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unsigned int m68k_lockup_r_16 (unsigned int address)
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{
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#ifdef LOGERROR
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error ("Lockup %08X.w (%08X)\n", address, m68k_get_reg (NULL, M68K_REG_PC));
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@ -113,7 +113,7 @@ uint32 m68k_lockup_r_16 (uint32 address)
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/*--------------------------------------------------------------------------*/
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/* cartridge EEPROM */
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/*--------------------------------------------------------------------------*/
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uint32 eeprom_read_byte(uint32 address)
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unsigned int eeprom_read_byte(unsigned int address)
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{
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if (address != eeprom.type.sda_out_adr)
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{
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@ -122,7 +122,7 @@ uint32 eeprom_read_byte(uint32 address)
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return eeprom_read(address, 0);
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}
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uint32 eeprom_read_word(uint32 address)
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unsigned int eeprom_read_word(unsigned int address)
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{
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if (address != (eeprom.type.sda_out_adr & 0xfffffe))
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{
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@ -131,7 +131,7 @@ uint32 eeprom_read_word(uint32 address)
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return eeprom_read(address, 1);
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}
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void eeprom_write_byte(uint32 address, uint32 data)
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void eeprom_write_byte(unsigned int address, unsigned int data)
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{
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if ((address != eeprom.type.sda_in_adr) && (address != eeprom.type.scl_adr))
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{
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@ -141,7 +141,7 @@ void eeprom_write_byte(uint32 address, uint32 data)
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eeprom_write(address, data, 0);
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}
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void eeprom_write_word(uint32 address, uint32 data)
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void eeprom_write_word(unsigned int address, unsigned int data)
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{
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if ((address != (eeprom.type.sda_in_adr & 0xfffffe)) && (address != (eeprom.type.scl_adr & 0xfffffe)))
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{
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@ -155,7 +155,7 @@ void eeprom_write_word(uint32 address, uint32 data)
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/*--------------------------------------------------------------------------*/
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/* Z80 bus (accessed through I/O chip) */
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/*--------------------------------------------------------------------------*/
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uint32 z80_read_byte(uint32 address)
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unsigned int z80_read_byte(unsigned int address)
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{
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switch ((address >> 13) & 3)
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{
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@ -181,35 +181,13 @@ uint32 z80_read_byte(uint32 address)
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}
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}
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uint32 z80_read_word(uint32 address)
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unsigned int z80_read_word(unsigned int address)
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{
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switch ((address >> 13) & 3)
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{
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case 2: /* YM2612 */
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{
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unsigned int data = fm_read(mcycles_68k, address & 3);
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return (data << 8 | data);
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}
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case 3: /* Misc */
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{
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if ((address & 0xff00) == 0x7f00)
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{
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/* VDP (through 68k bus) */
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return m68k_lockup_r_16(address);
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}
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return (m68k_read_bus_16(address) | 0xffff);
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}
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default: /* ZRAM */
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{
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unsigned int data = zram[address & 0x1fff];
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return (data << 8 | data);
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}
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}
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unsigned int data = z80_read_byte(address);
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return (data | (data << 8));
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}
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void z80_write_byte(uint32 address, uint32 data)
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void z80_write_byte(unsigned int address, unsigned int data)
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{
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switch ((address >> 13) & 3)
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{
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@ -224,75 +202,44 @@ void z80_write_byte(uint32 address, uint32 data)
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switch ((address >> 8) & 0x7f)
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{
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case 0x60: /* Bank register */
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{
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gen_zbank_w(data & 1);
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return;
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}
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case 0x7f: /* VDP */
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{
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m68k_lockup_w_8(address, data);
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return;
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}
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default:
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{
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m68k_unused_8_w(address, data);
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return;
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}
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}
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}
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default: /* ZRAM */
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{
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zram[address & 0x1fff] = data;
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mcycles_68k += 8; /* Z80 bus latency (fixes Pacman 2: New Adventures) */
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mcycles_68k += 8; /* ZRAM access latency (fixes Pacman 2: New Adventures) */
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return;
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}
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}
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}
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void z80_write_word(uint32 address, uint32 data)
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void z80_write_word(unsigned int address, unsigned int data)
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{
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switch ((address >> 13) & 3)
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{
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case 2: /* YM2612 */
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{
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fm_write(mcycles_68k, address & 3, data >> 8);
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return;
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}
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case 3:
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{
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switch ((address >> 8) & 0x7f)
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{
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case 0x60: /* Bank register */
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{
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gen_zbank_w((data >> 8) & 1);
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return;
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}
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case 0x7f: /* VDP */
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{
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m68k_lockup_w_16(address, data);
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return;
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}
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default:
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{
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m68k_unused_16_w(address, data);
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return;
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}
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}
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}
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default: /* ZRAM */
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{
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zram[address & 0x1fff] = data >> 8;
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return;
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}
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}
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z80_write_byte(address, data >> 8);
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}
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/*--------------------------------------------------------------------------*/
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/* I/O Control */
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/*--------------------------------------------------------------------------*/
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uint32 ctrl_io_read_byte(uint32 address)
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unsigned int ctrl_io_read_byte(unsigned int address)
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{
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switch ((address >> 8) & 0xff)
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{
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@ -360,7 +307,7 @@ uint32 ctrl_io_read_byte(uint32 address)
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}
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}
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uint32 ctrl_io_read_word(uint32 address)
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unsigned int ctrl_io_read_word(unsigned int address)
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{
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switch ((address >> 8) & 0xff)
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{
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@ -405,7 +352,7 @@ uint32 ctrl_io_read_word(uint32 address)
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case 4:
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{
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uint32 temp = svp->ssp1601.gr[SSP_PM0].h;
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unsigned int temp = svp->ssp1601.gr[SSP_PM0].h;
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svp->ssp1601.gr[SSP_PM0].h &= ~1;
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return temp;
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}
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@ -434,7 +381,7 @@ uint32 ctrl_io_read_word(uint32 address)
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}
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}
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void ctrl_io_write_byte(uint32 address, uint32 data)
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void ctrl_io_write_byte(unsigned int address, unsigned int data)
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{
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switch ((address >> 8) & 0xff)
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{
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@ -507,7 +454,7 @@ void ctrl_io_write_byte(uint32 address, uint32 data)
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}
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}
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void ctrl_io_write_word(uint32 address, uint32 data)
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void ctrl_io_write_word(unsigned int address, unsigned int data)
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{
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switch ((address >> 8) & 0xff)
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{
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@ -581,7 +528,7 @@ void ctrl_io_write_word(uint32 address, uint32 data)
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/*--------------------------------------------------------------------------*/
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/* VDP */
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/*--------------------------------------------------------------------------*/
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uint32 vdp_read_byte(uint32 address)
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unsigned int vdp_read_byte(unsigned int address)
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{
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switch (address & 0xfd)
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{
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@ -632,7 +579,7 @@ uint32 vdp_read_byte(uint32 address)
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}
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}
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uint32 vdp_read_word(uint32 address)
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unsigned int vdp_read_word(unsigned int address)
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{
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switch (address & 0xfc)
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{
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@ -643,7 +590,7 @@ uint32 vdp_read_word(uint32 address)
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case 0x04: /* CTRL */
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{
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return ((vdp_ctrl_r(mcycles_68k) & 0x3FF) | (m68k_read_pcrelative_16(REG_PC) & 0xFC00));
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return ((vdp_ctrl_r(mcycles_68k) & 0x3FF) | (m68k_read_pcrelative_16(REG_PC) & 0xFC00));
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}
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case 0x08: /* HVC */
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@ -665,7 +612,7 @@ uint32 vdp_read_word(uint32 address)
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}
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}
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void vdp_write_byte(uint32 address, uint32 data)
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void vdp_write_byte(unsigned int address, unsigned int data)
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{
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switch (address & 0xfc)
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{
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@ -713,7 +660,7 @@ void vdp_write_byte(uint32 address, uint32 data)
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}
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}
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void vdp_write_word(uint32 address, uint32 data)
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void vdp_write_word(unsigned int address, unsigned int data)
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{
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switch (address & 0xfc)
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{
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@ -759,7 +706,7 @@ void vdp_write_word(uint32 address, uint32 data)
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/******* PICO ************************************************/
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uint32 pico_read_byte(uint32 address)
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unsigned int pico_read_byte(unsigned int address)
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{
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/* PICO */
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switch (address & 0xff)
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@ -771,7 +718,7 @@ uint32 pico_read_byte(uint32 address)
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case 0x03: /* IO register */
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{
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uint8 retval = 0xff;
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unsigned int retval = 0xff;
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if (input.pad[0] & INPUT_B) retval &= ~0x10;
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if (input.pad[0] & INPUT_A) retval &= ~0x80;
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if (input.pad[0] & INPUT_UP) retval &= ~0x01;
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@ -820,7 +767,7 @@ uint32 pico_read_byte(uint32 address)
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}
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}
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uint32 pico_read_word(uint32 address)
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unsigned int pico_read_word(unsigned int address)
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{
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return (pico_read_byte(address | 1) | (m68k_read_bus_8(address) << 8));
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}
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@ -25,43 +25,43 @@
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#define _MEM68K_H_
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/* unused areas */
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extern uint32 m68k_read_bus_8(uint32 address);
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extern uint32 m68k_read_bus_16(uint32 address);
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extern void m68k_unused_8_w (uint32 address, uint32 data);
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extern void m68k_unused_16_w (uint32 address, uint32 data);
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extern unsigned int m68k_read_bus_8(unsigned int address);
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extern unsigned int m68k_read_bus_16(unsigned int address);
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extern void m68k_unused_8_w(unsigned int address, unsigned int data);
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extern void m68k_unused_16_w(unsigned int address, unsigned int data);
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/* illegal areas */
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extern uint32 m68k_lockup_r_8 (uint32 address);
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extern uint32 m68k_lockup_r_16 (uint32 address);
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extern void m68k_lockup_w_8 (uint32 address, uint32 data);
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extern void m68k_lockup_w_16 (uint32 address, uint32 data);
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extern unsigned int m68k_lockup_r_8(unsigned int address);
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extern unsigned int m68k_lockup_r_16(unsigned int address);
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extern void m68k_lockup_w_8(unsigned int address, unsigned int data);
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extern void m68k_lockup_w_16(unsigned int address, unsigned int data);
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/* eeprom */
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extern uint32 eeprom_read_byte(uint32 address);
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extern uint32 eeprom_read_word(uint32 address);
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extern void eeprom_write_byte(uint32 address, uint32 data);
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extern void eeprom_write_word(uint32 address, uint32 data);
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extern unsigned int eeprom_read_byte(unsigned int address);
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extern unsigned int eeprom_read_word(unsigned int address);
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extern void eeprom_write_byte(unsigned int address, unsigned int data);
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extern void eeprom_write_word(unsigned int address, unsigned int data);
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/* Z80 bus */
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extern uint32 z80_read_byte(uint32 address);
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extern uint32 z80_read_word(uint32 address);
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extern void z80_write_byte(uint32 address, uint32 data);
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extern void z80_write_word(uint32 address, uint32 data);
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extern unsigned int z80_read_byte(unsigned int address);
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extern unsigned int z80_read_word(unsigned int address);
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extern void z80_write_byte(unsigned int address, unsigned int data);
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extern void z80_write_word(unsigned int address, unsigned int data);
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/* I/O & Control registers */
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extern uint32 ctrl_io_read_byte(uint32 address);
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extern uint32 ctrl_io_read_word(uint32 address);
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extern void ctrl_io_write_byte(uint32 address, uint32 data);
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extern void ctrl_io_write_word(uint32 address, uint32 data);
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extern unsigned int ctrl_io_read_byte(unsigned int address);
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extern unsigned int ctrl_io_read_word(unsigned int address);
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extern void ctrl_io_write_byte(unsigned int address, unsigned int data);
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extern void ctrl_io_write_word(unsigned int address, unsigned int data);
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/* VDP */
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extern uint32 vdp_read_byte(uint32 address);
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extern uint32 vdp_read_word(uint32 address);
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extern void vdp_write_byte(uint32 address, uint32 data);
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extern void vdp_write_word(uint32 address, uint32 data);
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extern unsigned int vdp_read_byte(unsigned int address);
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extern unsigned int vdp_read_word(unsigned int address);
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extern void vdp_write_byte(unsigned int address, unsigned int data);
|
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extern void vdp_write_word(unsigned int address, unsigned int data);
|
||||
|
||||
/* PICO */
|
||||
extern uint32 pico_read_byte(uint32 address);
|
||||
extern uint32 pico_read_word(uint32 address);
|
||||
extern unsigned int pico_read_byte(unsigned int address);
|
||||
extern unsigned int pico_read_word(unsigned int address);
|
||||
|
||||
#endif /* _MEM68K_H_ */
|
||||
|
||||
@ -27,7 +27,7 @@
|
||||
machine lock up.
|
||||
*/
|
||||
|
||||
uint32 zbank_unused_r(uint32 address)
|
||||
unsigned int zbank_unused_r(unsigned int address)
|
||||
{
|
||||
#ifdef LOGERROR
|
||||
error("Z80 bank unused read %06X\n", address);
|
||||
@ -35,14 +35,14 @@ uint32 zbank_unused_r(uint32 address)
|
||||
return (address & 1) ? 0x00 : 0xff;
|
||||
}
|
||||
|
||||
void zbank_unused_w(uint32 address, uint32 data)
|
||||
void zbank_unused_w(unsigned int address, unsigned int data)
|
||||
{
|
||||
#ifdef LOGERROR
|
||||
error("Z80 bank unused write %06X = %02X\n", address, data);
|
||||
#endif
|
||||
}
|
||||
|
||||
uint32 zbank_lockup_r(uint32 address)
|
||||
unsigned int zbank_lockup_r(unsigned int address)
|
||||
{
|
||||
#ifdef LOGERROR
|
||||
error("Z80 bank lockup read %06X\n", address);
|
||||
@ -55,7 +55,7 @@ uint32 zbank_lockup_r(uint32 address)
|
||||
return 0xff;
|
||||
}
|
||||
|
||||
void zbank_lockup_w(uint32 address, uint32 data)
|
||||
void zbank_lockup_w(unsigned int address, unsigned int data)
|
||||
{
|
||||
#ifdef LOGERROR
|
||||
error("Z80 bank lockup write %06X = %02X\n", address, data);
|
||||
@ -68,7 +68,7 @@ void zbank_lockup_w(uint32 address, uint32 data)
|
||||
}
|
||||
|
||||
/* I/O & Control registers */
|
||||
uint32 zbank_read_ctrl_io(uint32 address)
|
||||
unsigned int zbank_read_ctrl_io(unsigned int address)
|
||||
{
|
||||
switch ((address >> 8) & 0xff)
|
||||
{
|
||||
@ -130,7 +130,7 @@ uint32 zbank_read_ctrl_io(uint32 address)
|
||||
}
|
||||
}
|
||||
|
||||
void zbank_write_ctrl_io(uint32 address, uint32 data)
|
||||
void zbank_write_ctrl_io(unsigned int address, unsigned int data)
|
||||
{
|
||||
switch ((address >> 8) & 0xff)
|
||||
{
|
||||
@ -205,7 +205,7 @@ void zbank_write_ctrl_io(uint32 address, uint32 data)
|
||||
|
||||
|
||||
/* VDP */
|
||||
uint32 zbank_read_vdp(uint32 address)
|
||||
unsigned int zbank_read_vdp(unsigned int address)
|
||||
{
|
||||
switch (address & 0xfd)
|
||||
{
|
||||
@ -256,7 +256,7 @@ uint32 zbank_read_vdp(uint32 address)
|
||||
}
|
||||
}
|
||||
|
||||
void zbank_write_vdp(uint32 address, uint32 data)
|
||||
void zbank_write_vdp(unsigned int address, unsigned int data)
|
||||
{
|
||||
switch (address & 0xfc)
|
||||
{
|
||||
|
||||
@ -23,14 +23,14 @@
|
||||
#ifndef _MEMBNK_H_
|
||||
#define _MEMBNK_H_
|
||||
|
||||
extern uint32 zbank_unused_r(uint32 address);
|
||||
extern void zbank_unused_w(uint32 address, uint32 data);
|
||||
extern uint32 zbank_lockup_r(uint32 address);
|
||||
extern void zbank_lockup_w(uint32 address, uint32 data);
|
||||
extern uint32 zbank_read_ctrl_io(uint32 address);
|
||||
extern void zbank_write_ctrl_io(uint32 address, uint32 data);
|
||||
extern uint32 zbank_read_vdp(uint32 address);
|
||||
extern void zbank_write_vdp(uint32 address, uint32 data);
|
||||
extern unsigned int zbank_unused_r(unsigned int address);
|
||||
extern void zbank_unused_w(unsigned int address, unsigned int data);
|
||||
extern unsigned int zbank_lockup_r(unsigned int address);
|
||||
extern void zbank_lockup_w(unsigned int address, unsigned int data);
|
||||
extern unsigned int zbank_read_ctrl_io(unsigned int address);
|
||||
extern void zbank_write_ctrl_io(unsigned int address, unsigned int data);
|
||||
extern unsigned int zbank_read_vdp(unsigned int address);
|
||||
extern void zbank_write_vdp(unsigned int address, unsigned int data);
|
||||
|
||||
struct _zbank_memory_map
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user