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Bushi Seiryuuden/ROM map: Difference between revisions
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Latest revision as of 21:06, 28 January 2024
The following article is a ROM map for Bushi Seiryuuden.
Bank $80
$80/8057 - Start Up Register Clear up
$80/8057 E2 20 SEP #$20 $80/8059 A9 01 LDA #$01 $80/805B 8D 00 42 STA $4200 ; Disable NMI, enable Auto-Joypad-Read $80/805E 8D 72 00 STA $0072 ; $4200 Buffer? $80/8061 8D 0D 42 STA $420D ; Activate Fast-ROM $80/8064 9C 01 42 STZ $4201 ; Clear Programmable I/O port $80/8067 9C 02 42 STZ $4202 ; Clear Multiplicand register $80/806A 9C 03 42 STZ $4203 ; Clear Multiplicand register $80/806D 9C 04 42 STZ $4204 ; Clear Dividend Register $80/8070 9C 05 42 STZ $4205 ; Clear Dividend Register $80/8073 9C 06 42 STZ $4206 ; Clear Divisor Register $80/8076 9C 07 42 STZ $4207 ; H Timer (HBLANK Register) $80/8079 9C 08 42 STZ $4208 ; H Timer (HBLANK Register) $80/807C 9C 09 42 STZ $4209 ; V Timer (VBLANK Register) $80/807F 9C 0A 42 STZ $420A ; V Timer (VBLANK Register) $80/8082 9C 0B 42 STZ $420B ; Disable all DMAs $80/8085 9C 0C 42 STZ $420C ; Disable all HDMAs $80/8088 C2 20 REP #$20 $80/808A 6B RTL
$80/826D - Joypad Input Fetch subroutine
$80/826D A2 02 00 LDX #$0002 A:0000 X:CF76 Y:D04C P:envmxdIZC $80/8270 BD 08 01 LDA $0108,x[$80:010A] A:0000 X:0002 Y:D04C P:envmxdIzC $80/8273 F0 05 BEQ $05 [$827A] A:0000 X:0002 Y:D04C P:envmxdIZC $80/827A E2 20 SEP #$20 A:0000 X:0002 Y:D04C P:envmxdIZC $80/827C AD 12 42 LDA $4212 [$80:4212] A:0000 X:0002 Y:D04C P:envMxdIZC $80/827F 29 01 AND #$01 A:0082 X:0002 Y:D04C P:eNvMxdIzC $80/8281 D0 F9 BNE $F9 [$827C] A:0000 X:0002 Y:D04C P:envMxdIZC $80/8283 C2 20 REP #$20 A:0000 X:0002 Y:D04C P:envMxdIZC $80/8285 BD 18 42 LDA $4218,x[$80:421A] A:0000 X:0002 Y:D04C P:envmxdIZC $80/8288 9D 10 01 STA $0110,x[$80:0112] A:0000 X:0002 Y:D04C P:envmxdIZC $80/828B 5D 1C 01 EOR $011C,x[$80:011E] A:0000 X:0002 Y:D04C P:envmxdIZC $80/828E 3D 10 01 AND $0110,x[$80:0112] A:0000 X:0002 Y:D04C P:envmxdIZC $80/8291 9D 14 01 STA $0114,x[$80:0116] A:0000 X:0002 Y:D04C P:envmxdIZC $80/8294 9D 18 01 STA $0118,x[$80:011A] A:0000 X:0002 Y:D04C P:envmxdIZC $80/8297 BD 10 01 LDA $0110,x[$80:0112] A:0000 X:0002 Y:D04C P:envmxdIZC $80/829A F0 18 BEQ $18 [$82B4] A:0000 X:0002 Y:D04C P:envmxdIZC $80/82B4 AD 04 01 LDA $0104 [$80:0104] A:0000 X:0002 Y:D04C P:envmxdIZC $80/82B7 9D 28 01 STA $0128,x[$80:012A] A:0028 X:0002 Y:D04C P:envmxdIzC $80/82BA BD 10 01 LDA $0110,x[$80:0112] A:0028 X:0002 Y:D04C P:envmxdIzC $80/82BD 9D 1C 01 STA $011C,x[$80:011E] A:0000 X:0002 Y:D04C P:envmxdIZC $80/82C0 CA DEX A:0000 X:0002 Y:D04C P:envmxdIZC $80/82C1 CA DEX A:0000 X:0001 Y:D04C P:envmxdIzC $80/82C2 10 AC BPL $AC [$8270] A:0000 X:0000 Y:D04C P:envmxdIZC $80/82C4 AD 14 01 LDA $0114 [$80:0114] A:0000 X:FFFE Y:D04C P:eNvmxdIzC $80/82C7 2D 32 01 AND $0132 [$80:0132] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82CA 8D 2E 01 STA $012E [$80:012E] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82CD AD 10 01 LDA $0110 [$80:0110] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82D0 2D 32 01 AND $0132 [$80:0132] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82D3 8D 2C 01 STA $012C [$80:012C] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82D6 AD 18 01 LDA $0118 [$80:0118] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82D9 2D 32 01 AND $0132 [$80:0132] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82DC 8D 30 01 STA $0130 [$80:0130] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82DF AD 10 01 LDA $0110 [$80:0110] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82E2 29 00 08 AND #$0800 A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82E5 F0 03 BEQ $03 [$82EA] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82EA 8D 64 01 STA $0164 [$80:0164] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82ED AD 10 01 LDA $0110 [$80:0110] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82F0 29 00 04 AND #$0400 A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82F3 F0 03 BEQ $03 [$82F8] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82F8 8D 66 01 STA $0166 [$80:0166] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82FB AD 64 01 LDA $0164 [$80:0164] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/82FE D0 0E BNE $0E [$830E] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/8300 AD 10 01 LDA $0110 [$80:0110] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/8303 29 80 00 AND #$0080 A:0000 X:FFFE Y:D04C P:envmxdIZC $80/8306 D0 06 BNE $06 [$830E] A:0000 X:FFFE Y:D04C P:envmxdIZC $80/8308 A9 02 00 LDA #$0002 A:0000 X:FFFE Y:D04C P:envmxdIZC $80/830B 8D 64 01 STA $0164 [$80:0164] A:0002 X:FFFE Y:D04C P:envmxdIzC $80/830E 60 RTS A:0002 X:FFFE Y:D04C P:envmxdIzC
$80/857C - VRAM DMA
When this subroutine is called, there were done some register preparations before:
$28-A DMA Source Address.
$2C/D contain the VRAM destination.
$2E/F contains the number of bytes to transfer.
$80/857C 8B PHB ; Buffer Program Bank on Stack $80/857D 4B PHK ; Set current Bank ($80) as Program Bank $80/857E AB PLB $80/857F E2 20 SEP #$20 $80/8581 A9 00 LDA #$00 ; HDMA deactivation $80/8583 8D 0C 42 STA $420C $80/8586 A9 80 LDA #$80 ; VRAM transfer setting $80/8588 8D 15 21 STA $2115 $80/858B A5 2C LDA $2C ; VRAM Destination $80/858D 8D 16 21 STA $2116 $80/8590 A5 2D LDA $2D $80/8592 8D 17 21 STA $2117 $80/8595 A9 01 LDA #$01 ; DMA transfer settings, write 2 registers $80/8597 8D 00 43 STA $4300 $80/859A A5 28 LDA $28 ; DMA Source Address $80/859C 8D 02 43 STA $4302 $80/859F A5 29 LDA $29 $80/85A1 8D 03 43 STA $4303 $80/85A4 A5 2A LDA $2A $80/85A6 8D 04 43 STA $4304 $80/85A9 A9 18 LDA #$18 ; VRAM destination: ($21)18 - VRAM $80/85AB 8D 01 43 STA $4301 $80/85AE A5 2E LDA $2E ; Number of bytes to transfer $80/85B0 8D 05 43 STA $4305 $80/85B3 A5 2F LDA $2F $80/85B5 8D 06 43 STA $4306 $80/85B8 A9 01 LDA #$01 ; Activate DMA $80/85BA 8D 0B 42 STA $420B $80/85BD AF 74 00 80 LDA $800074 ; Reactivate HDMAs $80/85C1 8D 0C 42 STA $420C $80/85C4 C2 20 REP #$20 $80/85C6 AB PLB ; Restore Program Bank $80/85C7 6B RTL
$80/85CD - VRAM Clear DMA
This Subroutine uses a DMA to clear VRAM.
A contains the VRAM destinations.
Y contains the number of Bytes to transfer
$80/85CD 8B PHB ; Buffer Program Bank on Stack $80/85CE 4B PHK ; Set current Bank ($80) as Program Bank $80/85CF AB PLB $80/85D0 8D 16 21 STA $2116 ; VRAM Destination $80/85D3 8C 05 43 STY $4305 ; DMA Number of Bytes to transfer $80/85D6 9C 00 00 STZ $0000 ; Clear $80/85D9 9C 02 43 STZ $4302 ; DMA $80/85DC 9C 04 43 STZ $4304 $80/85DF E2 20 SEP #$20 $80/85E1 A9 00 LDA #$00 ; Deactivate HDMA $80/85E3 8F 0C 42 00 STA $00420C $80/85E7 A9 18 LDA #$18 ; DMA Destination: ($21)18 $80/85E9 8D 01 43 STA $4301 $80/85EC A9 09 LDA #$09 ; Fixed Transfer $80/85EE 8D 00 43 STA $4300 $80/85F1 A9 80 LDA #$80 ; VRAM transfer $80/85F3 8D 15 21 STA $2115 $80/85F6 A9 01 LDA #$01 ; Activate DMA $80/85F8 8D 0B 42 STA $420B $80/85FB AF 74 00 80 LDA $800074 ; Reactivate HDMA $80/85FF 8F 0C 42 00 STA $00420C $80/8603 C2 20 REP #$20 $80/8605 AB PLB ; Restore Program Bank $80/8606 6B RTL
$80/8FB1 - OAM Update
$80/8FB1 8B PHB ; Buffer Program Bank on Stack $80/8FB2 F4 80 80 PEA $8080 ; Set Program Bank to $80 $80/8FB5 AB PLB $80/8FB6 AB PLB ; You can only push a 16-bit value on stack, so you have to pull two bytes from stack $80/8FB7 E2 20 SEP #$20 $80/8FB9 A9 00 LDA #$00 ; Set the OAM address to $0000 $80/8FBB 8F 03 21 00 STA $002103 $80/8FBF 8F 02 21 00 STA $002102 $80/8FC3 A9 00 LDA #$00 ; DMA Settings $80/8FC5 8D 00 43 STA $4300 $80/8FC8 A9 04 LDA #$04 ; DMA Destination: $2104 (OAM) $80/8FCA 8D 01 43 STA $4301 $80/8FCD A9 00 LDA #$00 ; DMA Source Address: $7E2800 $80/8FCF 8D 02 43 STA $4302 $80/8FD2 A9 28 LDA #$28 $80/8FD4 8D 03 43 STA $4303 $80/8FD7 A9 7E LDA #$7E $80/8FD9 8D 04 43 STA $4304 $80/8FDC A9 20 LDA #$20 ; Number of Bytes to transfer: $220 $80/8FDE 8D 05 43 STA $4305 $80/8FE1 A9 02 LDA #$02 $80/8FE3 8D 06 43 STA $4306 $80/8FE6 A9 01 LDA #$01 ; Activate DMA $80/8FE8 8F 0B 42 00 STA $00420B $80/8FEC C2 20 REP #$20 $80/8FEE AB PLB ; Restore Program Bank $80/8FEF 6B RTL
$80/D1DF - VRAM DMA
$28–$2A contain the 24-bit Source Adress
$2C/D contain the VRAM destination
$2E/F contain the number of bytes to transfer
$80/D1DF E2 20 SEP #$20 $80/D1E1 A9 00 LDA #$00 ; Deactivate HDMA $80/D1E3 8D 0C 42 STA $420C $80/D1E6 C2 20 REP #$20 $80/D1E8 A5 28 LDA $28 ; Set the DMA Source Address $80/D1EA 8D 02 43 STA $4302 $80/D1ED A5 2C LDA $2C ; Set VRAM destination $80/D1EF 8D 16 21 STA $2116 $80/D1F2 A5 2E LDA $2E ; Set the number of bytes to transfer $80/D1F4 8D 05 43 STA $4305 $80/D1F7 E2 20 SEP #$20 $80/D1F9 A5 2A LDA $2A ; Set the DMA Source Bank $80/D1FB 8D 04 43 STA $4304 $80/D1FE A9 01 LDA #$01 ; DMA transfer settings $80/D200 8D 00 43 STA $4300 $80/D203 A9 18 LDA #$18 ; VRAM Destination $80/D205 8D 01 43 STA $4301 $80/D208 A9 80 LDA #$80 ; VRAM Transfer Settings $80/D20A 8D 15 21 STA $2115 $80/D20D A9 01 LDA #$01 ; Activate DMA $80/D20F 8D 0B 42 STA $420B $80/D212 AF 74 00 80 LDA $800074 ; Reactivate HDMA $80/D216 8F 0C 42 00 STA $00420C $80/D21A C2 20 REP #$20 $80/D21C 60 RTS
$80/F368 - CGRAM DMA
This subroutine updates the palette RAM.
$00 contains the CGRAM destination.
$04–6 contains the (24-bit) source address
$08/9 contains the number of bytes to transfer
$80/F368 8B PHB ; Buffer Program Bank on Stack $80/F369 4B PHK ; Set current Bank ($80) as Program Bank $80/F36A AB PLB $80/F36B E2 20 SEP #$20 $80/F36D A9 00 LDA #$00 ; Deactivate HDMA $80/F36F 8D 0C 42 STA $420C $80/F372 A5 00 LDA $00 ; Set the CGRAM address $80/F374 8D 21 21 STA $2121 $80/F377 A9 02 LDA #$02 ; DMA transfer settings: Write one register twice $80/F379 8D 00 43 STA $4300 $80/F37C A9 22 LDA #$22 ; DMA transfer destination: ($21)22 $80/F37E 8D 01 43 STA $4301 $80/F381 A5 04 LDA $04 ; Set up DMA transfer source address $80/F383 8D 02 43 STA $4302 $80/F386 A5 05 LDA $05 $80/F388 8D 03 43 STA $4303 $80/F38B A5 06 LDA $06 $80/F38D 8D 04 43 STA $4304 $80/F390 A5 08 LDA $08 ; Number of bytes to transfer $80/F392 8D 05 43 STA $4305 $80/F395 A5 09 LDA $09 $80/F397 8D 06 43 STA $4306 $80/F39A A9 01 LDA #$01 ; Activate DMA $80/F39C 8D 0B 42 STA $420B $80/F39F AF 74 00 80 LDA $800074 ; Reactivate HDMA $80/F3A3 8D 0C 42 STA $420C $80/F3A6 C2 20 REP #$20 $80/F3A8 AB PLB ; Restore Program Bank $80/F3A9 6B RTL
$80/F368 - CGRAM Load Subroutine
This subroutine copies the whole content of the CGRAM to $7FC70D - $7FC90C and $7FC90D - $7FCB0C.
$80/F117 8B PHB ; Buffer Program Bank on Stack $80/F118 4B PHK ; Set current Bank ($80) as Program Bank $80/F119 AB PLB $80/F11A E2 20 SEP #$20 $80/F11C A9 00 LDA #$00 ; Deactivate HDMAs $80/F11E 8D 0C 42 STA $420C $80/F121 9C 21 21 STZ $2121 ; Set CGRAM address to $00 $80/F124 A9 80 LDA #$80 ; DMA Transfer options: Transfer FROM CGRAM TO WRAM $80/F126 8D 00 43 STA $4300 $80/F129 A9 3B LDA #$3B ; Load Data from $213B (CGRAM Read Register) $80/F12B 8D 01 43 STA $4301 $80/F12E A9 0D LDA #$0D ; Destination in WRAM: $7FC70D $80/F130 8D 02 43 STA $4302 $80/F133 A9 C7 LDA #$C7 $80/F135 8D 03 43 STA $4303 $80/F138 A9 7F LDA #$7F $80/F13A 8D 04 43 STA $4304 $80/F13D A9 00 LDA #$00 ; Transfer $200 bytes - whole CGRAM $80/F13F 8D 05 43 STA $4305 $80/F142 A9 02 LDA #$02 $80/F144 8D 06 43 STA $4306 $80/F147 A9 01 LDA #$01 ; Activate DMA $80/F149 8D 0B 42 STA $420B $80/F14C A9 80 LDA #$80 ; DMA Transfer options: Transfer FROM CGRAM TO WRAM $80/F14E 8D 00 43 STA $4300 $80/F151 A9 3B LDA #$3B ; Load Data from $213B (CGRAM Read Register) $80/F153 8D 01 43 STA $4301 $80/F156 A9 0D LDA #$0D ; Destination in WRAM: $7FC90D $80/F158 8D 02 43 STA $4302 $80/F15B A9 C9 LDA #$C9 $80/F15D 8D 03 43 STA $4303 $80/F160 A9 7F LDA #$7F $80/F162 8D 04 43 STA $4304 $80/F165 A9 00 LDA #$00 ; Transfer $200 bytes - whole CGRAM $80/F167 8D 05 43 STA $4305 $80/F16A A9 02 LDA #$02 $80/F16C 8D 06 43 STA $4306 $80/F16F A9 01 LDA #$01 ; Activate DMA $80/F171 8D 0B 42 STA $420B $80/F174 AD 74 00 LDA $0074 ; Reactivate HDMA $80/F177 8D 0C 42 STA $420C $80/F17A C2 20 REP #$20 $80/F17C AB PLB ; Restore Program Bank $80/F17D 6B RTL
Bank $81
$81/A48A - Update Scroll Registers
$81/A48A 8B PHB ; Buffer Program Bank on Stack $81/A48B 4B PHK ; Set current Bank ($81) as Program Bank $81/A48C AB PLB $81/A48D AD 13 16 LDA $1613 ; ??? Calculate BG1 H-Scroll $81/A490 18 CLC $81/A491 6D 17 16 ADC $1617 ; ??? $81/A494 85 00 STA $00 ; ??? $81/A496 AD 1B 16 LDA $161B ; ??? Calculate BG1 V-Scroll $81/A499 18 CLC $81/A49A 6D 1F 16 ADC $161F ; ??? $81/A49D 3A DEC A ; ??? $81/A49E 85 02 STA $02 ; ??? $81/A4A0 AD 23 16 LDA $1623 ; ??? Calculate BG2 H-Scroll $81/A4A3 18 CLC $81/A4A4 6D 27 16 ADC $1627 ; ??? $81/A4A7 85 04 STA $04 ; ??? $81/A4A9 AD 2B 16 LDA $162B ; ??? Calculate BG2 V-Scroll $81/A4AC 18 CLC $81/A4AD 6D 2F 16 ADC $162F ; ??? $81/A4B0 3A DEC A ; ??? $81/A4B1 85 06 STA $06 ; ??? $81/A4B3 E2 20 SEP #$20 $81/A4B5 A5 00 LDA $00 ; Update BG1 H-Scroll $81/A4B7 8D 0D 21 STA $210D $81/A4BA A5 01 LDA $01 $81/A4BC 8D 0D 21 STA $210D $81/A4BF A5 02 LDA $02 ; Update BG1 V-Scroll $81/A4C1 8D 0E 21 STA $210E $81/A4C4 A5 03 LDA $03 $81/A4C6 8D 0E 21 STA $210E $81/A4C9 A5 04 LDA $04 ; Update BG2 H-Scroll $81/A4CB 8D 0F 21 STA $210F $81/A4CE A5 05 LDA $05 $81/A4D0 8D 0F 21 STA $210F $81/A4D3 A5 06 LDA $06 ; Update BG2 V-Scroll $81/A4D5 8D 10 21 STA $2110 $81/A4D8 A5 07 LDA $07 $81/A4DA 8D 10 21 STA $2110 $81/A4DD AD 33 16 LDA $1633 ; Update BG3 H-Scroll $81/A4E0 8D 11 21 STA $2111 $81/A4E3 AD 34 16 LDA $1634 $81/A4E6 8D 11 21 STA $2111 $81/A4E9 AD 3B 16 LDA $163B ; Update BG3 V-Scroll $81/A4EC 8D 12 21 STA $2112 $81/A4EF AD 3C 16 LDA $163C $81/A4F2 8D 12 21 STA $2112 $81/A4F5 C2 30 REP #$30 $81/A4F7 AB PLB ; Restore Program Bank $81/A4F8 6B RTL
Internal Data for Bushi Seiryuuden
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