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https://github.com/holub/mame
synced 2025-05-21 13:18:56 +03:00
Ported code from MESS, not worth
This commit is contained in:
Angelo Salese
parent
0b464fb4d6
commit
72a66946fd
@ -48,6 +48,8 @@ struct snes_cart_info snes_cart;
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#include "machine/snesst10.c"
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#include "machine/snesbsx.c"
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#define USE_CYCLE_STEAL 1
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/*************************************
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Timers
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@ -844,6 +846,7 @@ address | | | | | | |
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*/
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#if USE_CYCLE_STEAL
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/*FIXME: missing work RAM access steal / we need to do this less "aggressive" otherwise we lose too much CPU horsepower, why? */
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static int snes_bank_0x00_0x3f_cycles(running_machine *machine,UINT32 offset)
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{
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@ -905,6 +908,7 @@ static int snes_bank_0x80_0xbf_cycles(running_machine *machine,UINT32 offset)
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return 0; //TODO: 6
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}
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#endif
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/* 0x000000 - 0x2fffff */
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READ8_HANDLER( snes_r_bank1 )
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@ -957,8 +961,10 @@ READ8_HANDLER( snes_r_bank1 )
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else
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value = snes_ram[offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -snes_bank_0x00_0x3f_cycles(space->machine, offset));
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#endif
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return value;
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}
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@ -1020,8 +1026,10 @@ READ8_HANDLER( snes_r_bank2 )
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else
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value = snes_ram[0x300000 + offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -snes_bank_0x00_0x3f_cycles(space->machine, offset));
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#endif
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return value;
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}
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@ -1061,8 +1069,10 @@ READ8_HANDLER( snes_r_bank3 )
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else /* Mode 21 & 25 + SuperFX games */
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value = snes_ram[0x400000 + offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -8);
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#endif
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return value;
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}
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@ -1099,8 +1109,10 @@ READ8_HANDLER( snes_r_bank4 )
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else if (state->cart[0].mode & 0x0a) /* Mode 21 & 25 */
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value = snes_ram[0x600000 + offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -8);
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#endif
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return value;
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}
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@ -1135,8 +1147,10 @@ READ8_HANDLER( snes_r_bank5 )
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else
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value = snes_ram[0x700000 + offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -8);
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#endif
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return value;
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}
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@ -1183,8 +1197,10 @@ READ8_HANDLER( snes_r_bank6 )
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else
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value = snes_ram[0x800000 + offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -snes_bank_0x80_0xbf_cycles(space->machine, offset));
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#endif
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return value;
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}
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@ -1236,8 +1252,10 @@ READ8_HANDLER( snes_r_bank7 )
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else /* Mode 21 & 25 + SuperFX Games */
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value = snes_ram[0xc00000 + offset];
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -((snes_ram[MEMSEL] & 1) ? 6 : 8));
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#endif
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return value;
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}
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@ -1290,8 +1308,10 @@ WRITE8_HANDLER( snes_w_bank1 )
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else
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logerror( "(PC=%06x) Attempt to write to ROM address: %X\n",cpu_get_pc(space->cpu),offset );
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -snes_bank_0x00_0x3f_cycles(space->machine, offset));
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#endif
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}
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/* 0x300000 - 0x3fffff */
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@ -1347,8 +1367,10 @@ WRITE8_HANDLER( snes_w_bank2 )
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else
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logerror("(PC=%06x) Attempt to write to ROM address: %X\n",cpu_get_pc(space->cpu),offset + 0x300000);
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -snes_bank_0x00_0x3f_cycles(space->machine, offset));
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#endif
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}
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/* 0x600000 - 0x6fffff */
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@ -1373,8 +1395,10 @@ WRITE8_HANDLER( snes_w_bank4 )
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else if (state->cart[0].mode & 0x0a)
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logerror("(PC=%06x) Attempt to write to ROM address: %X\n",cpu_get_pc(space->cpu),offset + 0x600000);
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -8);
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#endif
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}
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/* 0x700000 - 0x7dffff */
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@ -1398,8 +1422,10 @@ WRITE8_HANDLER( snes_w_bank5 )
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else if (state->cart[0].mode & 0x0a)
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logerror("(PC=%06x) Attempt to write to ROM address: %X\n",cpu_get_pc(space->cpu),offset + 0x700000);
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -8);
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#endif
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}
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@ -1446,8 +1472,10 @@ WRITE8_HANDLER( snes_w_bank6 )
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else
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logerror("(PC=%06x) Attempt to write to ROM address: %X\n",cpu_get_pc(space->cpu),offset + 0x800000);
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -snes_bank_0x80_0xbf_cycles(space->machine, offset));
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#endif
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}
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@ -1486,8 +1514,10 @@ WRITE8_HANDLER( snes_w_bank7 )
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else if (state->cart[0].mode & 0x0a)
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logerror("(PC=%06x) Attempt to write to ROM address: %X\n",cpu_get_pc(space->cpu),offset + 0xc00000);
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#if USE_CYCLE_STEAL
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if(!space->debugger_access())
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cpu_adjust_icount(space->cpu, -((snes_ram[MEMSEL] & 1) ? 6 : 8));
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#endif
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}
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@ -1597,7 +1627,7 @@ static void snes_init_timers( running_machine *machine )
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// SNES hcounter has a 0-339 range. hblank starts at counter 260.
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// clayfighter sets an HIRQ at 260, apparently it wants it to be before hdma kicks off, so we'll delay 2 pixels.
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state->hblank_offset = 268;
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state->hblank_offset = 274;
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timer_adjust_oneshot(state->hblank_timer, machine->primary_screen->time_until_pos(((snes_ram[STAT78] & 0x10) == SNES_NTSC) ? SNES_VTOTAL_NTSC - 1 : SNES_VTOTAL_PAL - 1, state->hblank_offset), 0);
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}
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@ -1988,8 +2018,10 @@ INLINE void snes_dma_transfer( address_space *space, UINT8 dma, UINT32 abus, UIN
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{
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snes_state *state = space->machine->driver_data<snes_state>();
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#if USE_CYCLE_STEAL
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/* every byte transfer takes 8 master cycles */
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cpu_adjust_icount(space->cpu,-8);
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#endif
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if (state->dma_channel[dma].dmap & 0x80) /* PPU->CPU */
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{
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@ -2197,8 +2229,10 @@ static void snes_dma( address_space *space, UINT8 channels )
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/* FIXME: we also need to round to the nearest 8 master cycles */
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#if USE_CYCLE_STEAL
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/* overhead steals 8 master cycles, correct? */
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cpu_adjust_icount(space->cpu,-8);
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#endif
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/* Assume priority of the 8 DMA channels is 0-7 */
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for (i = 0; i < 8; i++)
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@ -2309,13 +2343,17 @@ static void snes_dma( address_space *space, UINT8 channels )
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state->dma_channel[i].src_addr = abus;
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state->dma_channel[i].trans_size = 0;
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#if USE_CYCLE_STEAL
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/* active channel takes 8 master cycles */
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cpu_adjust_icount(space->cpu,-8);
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#endif
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}
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}
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/* finally, take yet another 8 master cycles for the aforementioned overhead */
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#if USE_CYCLE_STEAL
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cpu_adjust_icount(space->cpu,-8);
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#endif
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}
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READ8_HANDLER( superfx_r_bank1 )
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@ -2233,7 +2233,8 @@ READ8_HANDLER( snes_ppu_read )
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return snes_ppu.ppu2_open_bus;
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}
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return snes_ppu.ppu1_open_bus;
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/* note: remaining registers (Namely TM in Super Kick Boxing) returns MDR open bus, not PPU Open Bus! */
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return snes_open_bus_r(space, 0);
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}
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