From 8fa5eb3371d902b8d58dba6e6bf62726d7ed8dbc Mon Sep 17 00:00:00 2001 From: notaz Date: Fri, 27 Apr 2007 21:07:14 +0000 Subject: [PATCH] Blaster Master + other fixes git-svn-id: file:///home/notaz/opt/svn/fceu@112 be3aeb3a-fb24-0410-a615-afba39da0efa --- fce.c | 6 ++--- ncpu.S | 74 +++++++++++++++++++++++++++++++--------------------- ncpu_debug.c | 14 +++++++--- ops.h | 3 ++- x6502.h | 8 +++--- 5 files changed, 64 insertions(+), 41 deletions(-) diff --git a/fce.c b/fce.c index abcf10f..3cb0632 100644 --- a/fce.c +++ b/fce.c @@ -104,7 +104,7 @@ static int RWWrap=0; static void asmcpu_update(int32 cycles) { // timestamp.. - timestamp += ((cycles >> 4) * 43) >> 7; // aproximating /= 48 + //timestamp += ((cycles >> 4) * 43) >> 7; // aproximating /= 48 // some code from x6502.c fhcnt-=cycles; @@ -140,7 +140,7 @@ void asmcpu_unpack(void) X6502_Rebase_a(); nes_registers[4] = X.S << 24; nes_registers[4]|= X.IRQlow << 8; - nes_registers[7] = (uint32)X.count; + nes_registers[7] = (uint32)X.count << 16; // NVUB DIZC nes_registers[4]|= X.P & 0x5d; @@ -156,7 +156,7 @@ void asmcpu_pack(void) X.PC= nes_registers[3] - pc_base; X.S = nes_registers[4] >> 24; X.IRQlow = nes_registers[4] >> 8; - X.count = (int32) nes_registers[7]; + X.count = (int32) nes_registers[7] >> 16; // NVUB DIZC X.P = nes_registers[4] & 0x5d; diff --git a/ncpu.S b/ncpu.S index 0b79afb..6b68fe7 100644 --- a/ncpu.S +++ b/ncpu.S @@ -16,7 +16,7 @@ #define OTOFFS_NES_REGS (nes_registers - cpu_exec_table) #define OTOFFS_PC_BASE (pc_base - cpu_exec_table) #define OTOFFS_IRQ_HOOK (MapIRQHook - cpu_exec_table) -#define OTOFFS_IRQH_CYC (MapIRQHookCyc - cpu_exec_table) +#define OTOFFS_TIMESTAMP (timestamp - cpu_exec_table) #define OTOFFS_X (X_ - cpu_exec_table) @ fceu @@ -33,9 +33,14 @@ /* bbbb: -.ascii "rebase: %04x" +.ascii "lsr_a: %02x" .byte 0x0a,0 .align 4 +stmfd sp!,{r0-r3,r12,lr} +mov r1,r0 +ldr r0,=bbbb +bl printf +ldmfd sp!,{r0-r3,r12,lr} */ @@@ @@ -62,6 +67,16 @@ bbbb: .endm +@ updates fceu "timestamp" variable +@ loads cycles to reg, reg!=r1, trashes r1 +.macro FLUSH_TIMESTAMP reg + ldr r1, [REG_OP_TABLE, #OTOFFS_TIMESTAMP] + and \reg, REG_CYCLE, #0xff + add r1, r1, \reg + bic REG_CYCLE, REG_CYCLE, #0xff + str r1, [REG_OP_TABLE, #OTOFFS_TIMESTAMP] +.endm + @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@ -76,7 +91,8 @@ bbbb: .macro CYCLE_NEXT n, hook_check=1 @@DEBUG_INFO - subs REG_CYCLE, REG_CYCLE, #\n*48 + add REG_CYCLE, REG_CYCLE, #\n + subs REG_CYCLE, REG_CYCLE, #\n*48<<16 ble cpu_exec_end .if \hook_check tst REG_P_REST, #1<<16 @@ -107,11 +123,6 @@ bbbb: @@@ CLI¡¦PHP¤Ê¤É¥Õ¥é¥°¤òÊѹ¹¤·¤¿¾ì¹ç¤Ï¤³¤ì @@@ .macro CYCLE_NEXT_INT n -@ @@DEBUG_INFO -@ -@ subs REG_CYCLE, REG_CYCLE, #\n*48 -@ bgt cpu_exec_check_int -@ RETURN_FROM_CPU_EXEC CYCLE_NEXT \n .endm @@ -445,7 +456,8 @@ bbbb: bic REG_ADDR, REG_ADDR, #0x10000 and r0,REG_ADDR,#0xff cmp REG_Y,r0 - subgt REG_CYCLE,REG_CYCLE,#1*48 + addgt REG_CYCLE, REG_CYCLE, #1 + subgt REG_CYCLE, REG_CYCLE, #1*48<<16 .endm @ Indirect Indexed (for writes and rmws) @@ -482,7 +494,8 @@ bbbb: bic REG_ADDR, REG_ADDR, #0x10000 and r0,REG_ADDR,#0xff cmp REG_X,r0 - subgt REG_CYCLE,REG_CYCLE,#1*48 + addgt REG_CYCLE, REG_CYCLE, #1 + subgt REG_CYCLE, REG_CYCLE, #1*48<<16 .endm @ Absolute Indexed (for writes and rmws) @@ -500,7 +513,8 @@ bbbb: bic REG_ADDR, REG_ADDR, #0x10000 and r0,REG_ADDR,#0xff cmp REG_Y,r0 - subgt REG_CYCLE,REG_CYCLE,#1*48 + addgt REG_CYCLE, REG_CYCLE, #1 + subgt REG_CYCLE, REG_CYCLE, #1*48<<16 .endm @ Absolute Indexed (for writes and rmws) @@ -1906,14 +1920,16 @@ op7E: @ ROR $nnnn, X and r1,r1,#0xff add r1,r3,r1 tst r1,#0x100 - subne REG_CYCLE,REG_CYCLE, #1*48 + addne REG_CYCLE, REG_CYCLE, #1 + subne REG_CYCLE, REG_CYCLE, #1*48<<16 .endm .macro BRANCH_EQ ldreqsb r1, [REG_PC], #1 movne r1, #1 add REG_PC, REG_PC, r1 - subeq REG_CYCLE, REG_CYCLE, #1*48 + addeq REG_CYCLE, REG_CYCLE, #1 + subeq REG_CYCLE, REG_CYCLE, #1*48<<16 bne 1f HAD_BRANCH 1: @@ -1923,7 +1939,8 @@ op7E: @ ROR $nnnn, X ldrnesb r1, [REG_PC], #1 moveq r1, #1 add REG_PC, REG_PC, r1 - subne REG_CYCLE, REG_CYCLE, #1*48 + addne REG_CYCLE, REG_CYCLE, #1 + subne REG_CYCLE, REG_CYCLE, #1*48<<16 beq 1f HAD_BRANCH 1: @@ -2771,7 +2788,8 @@ do_int: REBASE_PC @ CYCLE_NEXT 7 - subs REG_CYCLE, REG_CYCLE, #7*48 + add REG_CYCLE, REG_CYCLE, #7 + subs REG_CYCLE, REG_CYCLE, #7*48<<16 ble cpu_exec_end ldrb r0, [REG_PC], #1 tst REG_P_REST, #0xff<<8 @@ -2881,6 +2899,7 @@ write_ppu_reg: write_high_reg: write_save_ram: write_rom_byte: + FLUSH_TIMESTAMP r2 @ Blaster Master, more... #ifndef DEBUG_ASM_6502 @ must preserve r0 (data) and r3 for the callers str REG_PC, [REG_OP_TABLE, #(OTOFFS_NES_REGS + 0x0c)] @ might get rebased @@ -2913,6 +2932,7 @@ write_rom_byte: ldr r2, =dwrite_count_a add r1, r1, #1 str r1, [r2] + and r0, r0, #0xff #endif bx lr @@ -2937,14 +2957,13 @@ cpu_exec: @ ldr REG_OP_TABLE, = cpu_exec_table @ set on init - tst REG_P_REST, #1<<16 - strne REG_CYCLE, [REG_OP_TABLE, #OTOFFS_IRQH_CYC] - CYCLE_NEXT 0, 0 cpu_exec_end: + FLUSH_TIMESTAMP r0 + tst REG_P_REST, #1<<16 - blne do_irq_hook + blne do_irq_hook_noflushts ldr r0, =nes_registers stmia r0, {r4-r12} @@ -3028,9 +3047,8 @@ pc_base: .long 0 MapIRQHook: .long 0 -MapIRQHookCyc: - .long 0 timestamp: +timestamp_a: .long 0 #ifndef DEBUG_ASM_6502 X: @@ -3153,6 +3171,7 @@ op9E: @ SHX $nnnn, Y .globl timestamp #else .globl nes_internal_ram + .globl timestamp_a #endif .globl X6502_Reset_a @ (void); .globl X6502_Power_a @ (void); @@ -3221,10 +3240,10 @@ TriggerNMINSF_a: X6502_AddCycles_a: ldr r2, =nes_registers - ldr r1, [r2, #0x1c] + ldrsh r1, [r2, #0x1e] mvn r3, #47 @ r3=-48 mla r0, r3, r0, r1 - str r0, [r2, #0x1c] + strh r0, [r2, #0x1e] bx lr @@ -3245,14 +3264,9 @@ X6502_Rebase_a: @ the nasty MapIRQHook thing from FCE.. @ test Gradius 2 (J) if you change this do_irq_hook: - @ ((cycles >> 4) * 43) >> 7; // aproximating /= 48 - ldr r1, [REG_OP_TABLE, #OTOFFS_IRQH_CYC] - str REG_CYCLE, [REG_OP_TABLE, #OTOFFS_IRQH_CYC] - mov r0, #43 - sub r1, r1, REG_CYCLE - mul r0, r1, r0 - mov r0, r0, lsr #11 + FLUSH_TIMESTAMP r0 +do_irq_hook_noflushts: #ifndef DEBUG_ASM_6502 @ I have reviewed all MapIRQHook functions, they only seem to cause IRQs, not messing cycles or something str REG_P_REST, [REG_OP_TABLE, #(OTOFFS_NES_REGS + 0x10)] @ might set irq diff --git a/ncpu_debug.c b/ncpu_debug.c index aed7afb..ce1b3cc 100644 --- a/ncpu_debug.c +++ b/ncpu_debug.c @@ -9,6 +9,7 @@ extern uint32 nes_registers[0x10]; extern uint32 pc_base; extern uint8 nes_internal_ram[0x800]; +extern uint32 timestamp_a; uint32 PC_prev = 0xcccccc, OP_prev = 0xcccccc; int32 g_cnt = 0; @@ -73,8 +74,8 @@ static void compare_state(void) fail = 1; } - if ((int32)nes_registers[7] != X.count) { - printf("cycles: %li vs %li\n", (int32)nes_registers[7], X.count); + if (((int32)nes_registers[7] >> 16) != X.count) { + printf("cycles: %li vs %li\n", (int32)nes_registers[7] >> 16, X.count); fail = 1; } @@ -99,6 +100,11 @@ static void compare_state(void) fail = 1; } + if (timestamp_a != timestamp) { + printf("timestamp: %lu vs %lu\n", timestamp_a, timestamp); + fail = 1; + } + if (fail) leave(); } @@ -166,11 +172,13 @@ void X6502_Run_d(int32 c) pending_irq = 0; } - nes_registers[7]=1; + nes_registers[7]=1<<16; X.count=1; dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0; mapirq_cyc_a = mapirq_cyc_c = 0; + timestamp_a = timestamp; + X6502_Run_c(); X6502_Run_a(); diff --git a/ops.h b/ops.h index 62b8481..cd595cd 100644 --- a/ops.h +++ b/ops.h @@ -22,7 +22,8 @@ case 0x00: /* BRK */ _PC++; PUSH(_PC>>8); PUSH(_PC); - PUSH(_P|U_FLAG|B_FLAG); + _P|=B_FLAG; + PUSH(_P|U_FLAG); _P|=I_FLAG; _PC=RdMem(0xFFFE); _PC|=RdMem(0xFFFF)<<8; diff --git a/x6502.h b/x6502.h index 1b63a2f..3216d50 100644 --- a/x6502.h +++ b/x6502.h @@ -84,11 +84,11 @@ extern void FP_FASTAPASS(1) (*MapIRQHook)(int a); { \ int32 cycles = (c) << 4; /* *16 */ \ if (PAL) cycles -= (c); /* *15 */ \ - nes_registers[7]+=cycles; \ - if (nes_registers[7] > 0) { \ - cycles = (int32)nes_registers[7]; \ + nes_registers[7]+=cycles<<16; \ + cycles=(int32)nes_registers[7]>>16; \ + if (cycles > 0) { \ X6502_Run_a(); \ - cycles -= (int32)nes_registers[7]; \ + cycles -= (int32)nes_registers[7]>>16; \ asmcpu_update(cycles); \ } \ } -- 2.39.2