📄 regs.inc
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;Copyright (C) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
;
;This program is free software; you can redistribute it and/or
;modify it under the terms of the GNU General Public License
;as published by the Free Software Foundation; either
;version 2 of the License, or (at your option) any later
;version.
;
;This program is distributed in the hope that it will be useful,
;but WITHOUT ANY WARRANTY; without even the implied warranty of
;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;GNU General Public License for more details.
;
;You should have received a copy of the GNU General Public License
;along with this program; if not, write to the Free Software
;Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
EXTSYM SFXEnable,regptr,initsfxregsr,initSA1regs,SA1Enable,initSDD1regs
EXTSYM SPC7110Enable,initSPC7110regs,RTCEnable,RTCReset
EXTSYM curypos,cycpl,debuggeron,pdh,Reg4212hack
EXTSYM vram
EXTSYM romispal
EXTSYM reg1read,spcnumread,spcon
EXTSYM reg2read
EXTSYM reg3read
EXTSYM reg4read
EXTSYM JoyEOrig,JoyENow
EXTSYM snesmouse
EXTSYM cycphb,joycontren,totlines
EXTSYM DosExit,invalid,numinst,previdmode,printhex,printnum
NEWSYM initregr
; Fill register pointer with invalid register accesses
mov edi,[regptr]
add edi,8000h
mov ecx,3000h
mov eax,regINVALID
.loopa
mov [edi],eax
add edi,4
loop .loopa
; Set all valid register accesses
setreg 2100h*4,reg2100r
setreg 2134h*4,reg2134r
setreg 2135h*4,reg2135r
setreg 2136h*4,reg2136r
setreg 2137h*4,reg2137r
setreg 2138h*4,reg2138r
setreg 2139h*4,reg2139r
setreg 213Ah*4,reg213Ar
setreg 213Bh*4,reg213Br
setreg 213Ch*4,reg213Cr
setreg 213Dh*4,reg213Dr
setreg 213Eh*4,reg213Er
setreg 213Fh*4,reg213Fr
setreg 2140h*4,reg2140r
setreg 2141h*4,reg2141r
setreg 2142h*4,reg2142r
setreg 2143h*4,reg2143r
setreg 2144h*4,reg2144r
setreg 2180h*4,reg2180r
setreg 4016h*4,reg4016r
setreg 4017h*4,reg4017r
setreg 420Ah*4,reg420Ar
setreg 420Bh*4,reg420Br
setreg 420Ch*4,reg420Cr
setreg 420Dh*4,reg420Dr
setreg 420Eh*4,reg420Er
setreg 420Fh*4,reg420Fr
setreg 4210h*4,reg4210r
setreg 4211h*4,reg4211r
setreg 4212h*4,reg4212r
setreg 4213h*4,reg4213r
setreg 4214h*4,reg4214r
setreg 4215h*4,reg4215r
setreg 4216h*4,reg4216r
setreg 4217h*4,reg4217r
setreg 4218h*4,reg4218r
setreg 4219h*4,reg4219r
setreg 421Ah*4,reg421Ar
setreg 421Bh*4,reg421Br
setreg 421Ch*4,reg421Cr
setreg 421Dh*4,reg421Dr
setreg 421Eh*4,reg421Er
setreg 421Fh*4,reg421Fr
setreg 4300h*4,reg43XXr
setreg 4301h*4,reg43XXr
setreg 4302h*4,reg43XXr
setreg 4303h*4,reg43XXr
setreg 4304h*4,reg43XXr
setreg 4305h*4,reg43XXr
setreg 4306h*4,reg43XXr
setreg 4307h*4,reg43XXr
setreg 4308h*4,reg43XXr
setreg 4309h*4,reg43XXr
setreg 430Ah*4,reg43XXr
setreg 430Bh*4,reg43XXr
setreg 430Ch*4,reg43XXr
setreg 430Dh*4,reg43XXr
setreg 430Eh*4,reg43XXr
setreg 430Fh*4,reg43XXr
setreg 4310h*4,reg43XXr
setreg 4311h*4,reg43XXr
setreg 4312h*4,reg43XXr
setreg 4313h*4,reg43XXr
setreg 4314h*4,reg43XXr
setreg 4315h*4,reg43XXr
setreg 4316h*4,reg43XXr
setreg 4317h*4,reg43XXr
setreg 4318h*4,reg43XXr
setreg 4319h*4,reg43XXr
setreg 431Ah*4,reg43XXr
setreg 431Bh*4,reg43XXr
setreg 431Ch*4,reg43XXr
setreg 431Dh*4,reg43XXr
setreg 431Eh*4,reg43XXr
setreg 431Fh*4,reg43XXr
setreg 4320h*4,reg43XXr
setreg 4321h*4,reg43XXr
setreg 4322h*4,reg43XXr
setreg 4323h*4,reg43XXr
setreg 4324h*4,reg43XXr
setreg 4325h*4,reg43XXr
setreg 4326h*4,reg43XXr
setreg 4327h*4,reg43XXr
setreg 4328h*4,reg43XXr
setreg 4329h*4,reg43XXr
setreg 432Ah*4,reg43XXr
setreg 432Bh*4,reg43XXr
setreg 432Ch*4,reg43XXr
setreg 432Dh*4,reg43XXr
setreg 432Eh*4,reg43XXr
setreg 432Fh*4,reg43XXr
setreg 4330h*4,reg43XXr
setreg 4331h*4,reg43XXr
setreg 4332h*4,reg43XXr
setreg 4333h*4,reg43XXr
setreg 4334h*4,reg43XXr
setreg 4335h*4,reg43XXr
setreg 4336h*4,reg43XXr
setreg 4337h*4,reg43XXr
setreg 4338h*4,reg43XXr
setreg 4339h*4,reg43XXr
setreg 433Ah*4,reg43XXr
setreg 433Bh*4,reg43XXr
setreg 433Ch*4,reg43XXr
setreg 433Dh*4,reg43XXr
setreg 433Eh*4,reg43XXr
setreg 433Fh*4,reg43XXr
setreg 4340h*4,reg43XXr
setreg 4341h*4,reg43XXr
setreg 4342h*4,reg43XXr
setreg 4343h*4,reg43XXr
setreg 4344h*4,reg43XXr
setreg 4345h*4,reg43XXr
setreg 4346h*4,reg43XXr
setreg 4347h*4,reg43XXr
setreg 4348h*4,reg43XXr
setreg 4349h*4,reg43XXr
setreg 434Ah*4,reg43XXr
setreg 434Bh*4,reg43XXr
setreg 434Ch*4,reg43XXr
setreg 434Dh*4,reg43XXr
setreg 434Eh*4,reg43XXr
setreg 434Fh*4,reg43XXr
setreg 4350h*4,reg43XXr
setreg 4351h*4,reg43XXr
setreg 4352h*4,reg43XXr
setreg 4353h*4,reg43XXr
setreg 4354h*4,reg43XXr
setreg 4355h*4,reg43XXr
setreg 4356h*4,reg43XXr
setreg 4357h*4,reg43XXr
setreg 4358h*4,reg43XXr
setreg 4359h*4,reg43XXr
setreg 435Ah*4,reg43XXr
setreg 435Bh*4,reg43XXr
setreg 435Ch*4,reg43XXr
setreg 435Dh*4,reg43XXr
setreg 435Eh*4,reg43XXr
setreg 435Fh*4,reg43XXr
setreg 4360h*4,reg43XXr
setreg 4361h*4,reg43XXr
setreg 4362h*4,reg43XXr
setreg 4363h*4,reg43XXr
setreg 4364h*4,reg43XXr
setreg 4365h*4,reg43XXr
setreg 4366h*4,reg43XXr
setreg 4367h*4,reg43XXr
setreg 4368h*4,reg43XXr
setreg 4369h*4,reg43XXr
setreg 436Ah*4,reg43XXr
setreg 436Bh*4,reg43XXr
setreg 436Ch*4,reg43XXr
setreg 436Dh*4,reg43XXr
setreg 436Eh*4,reg43XXr
setreg 436Fh*4,reg43XXr
setreg 4370h*4,reg43XXr
setreg 4371h*4,reg43XXr
setreg 4372h*4,reg43XXr
setreg 4373h*4,reg43XXr
setreg 4374h*4,reg43XXr
setreg 4375h*4,reg43XXr
setreg 4376h*4,reg43XXr
setreg 4377h*4,reg43XXr
setreg 4378h*4,reg43XXr
setreg 4379h*4,reg43XXr
setreg 437Ah*4,reg43XXr
setreg 437Bh*4,reg43XXr
setreg 437Ch*4,reg43XXr
setreg 437Dh*4,reg43XXr
setreg 437Eh*4,reg43XXr
setreg 437Fh*4,reg43XXr
cmp byte[SFXEnable],0
je .nosfx
call initsfxregsr
.nosfx
cmp byte[SA1Enable],0
je .nosa1
call initSA1regs
.nosa1
cmp byte[SDD1Enable],0
je .nosdd1
call initSDD1regs
.nosdd1
cmp byte[SPC7110Enable],0
je .nospc7110
call initSPC7110regs
.nospc7110
cmp byte[RTCEnable],0
je .noRTC
call RTCReset
.noRTC
ret
; global variables
NEWSYM invreg, dw 0
NEWSYM sndrot, db 0 ; rotates to use A,X or Y for sound skip
NEWSYM sndrot2, db 0 ; rotates a random value for sound skip
NEWSYM INTEnab, db 0 ; enables NMI(7)/VIRQ(5)/HIRQ(4)/JOY(0)
NEWSYM NMIEnab, db 1 ; controlled in e65816 loop. Sets to 81h
NEWSYM VIRQLoc, dw 0 ; VIRQ Y location
NEWSYM vidbright, db 0 ; screen brightness (0 .. 15)
NEWSYM previdbr, db 0 ; previous screen brightness
NEWSYM forceblnk, db 80h ; force blanking on/off ($80=on)
NEWSYM objptr, dd 0 ; pointer to object data in VRAM
NEWSYM objptrn, dd 0 ; pointer2 to object data in VRAM
NEWSYM objsize1, db 1 ; 1 = 8dot, 4=16 dot, 16=32 dot, 64=64dot
NEWSYM objsize2, db 4 ; large object size
NEWSYM objmovs1, db 2 ; number of bytes to move/paragraph
NEWSYM objadds1, dw 14 ; number of bytes to add/paragraph
NEWSYM objmovs2, db 2 ; number of bytes to move/paragraph
NEWSYM objadds2, dw 14 ; number of bytes to add/paragraph
NEWSYM oamaddrt, dw 0 ; oam address
NEWSYM oamaddrs, dw 0 ; oam address at beginning of vblank
NEWSYM objhipr, db 0 ; highest priority object #
NEWSYM bgmode, db 0 ; graphics mode ( 0 .. 7 )
NEWSYM bg3highst, db 0 ; is 1 if background 3 has the highest priority
NEWSYM bgtilesz, db 0 ; 0 = 8x8, 1 = 16x16, bit 0=bg1,bit1=bg2,etc
NEWSYM mosaicon, db 0 ; mosaic on, bit 0=bg1,bit1=bg2, etc
NEWSYM mosaicsz, db 0 ; mosaic size in pixels
NEWSYM bg1ptr, dw 0 ; pointer to background1
NEWSYM bg2ptr, dw 0 ; pointer to background2
NEWSYM bg3ptr, dw 0 ; pointer to background3
NEWSYM bg4ptr, dw 0 ; pointer to background4
NEWSYM bg1ptrb, dw 0 ; pointer to background1
NEWSYM bg2ptrb, dw 0 ; pointer to background2
NEWSYM bg3ptrb, dw 0 ; pointer to background3
NEWSYM bg4ptrb, dw 0 ; pointer to background4
NEWSYM bg1ptrc, dw 0 ; pointer to background1
NEWSYM bg2ptrc, dw 0 ; pointer to background2
NEWSYM bg3ptrc, dw 0 ; pointer to background3
NEWSYM bg4ptrc, dw 0 ; pointer to background4
NEWSYM bg1ptrd, dw 0 ; pointer to background1
NEWSYM bg2ptrd, dw 0 ; pointer to background2
NEWSYM bg3ptrd, dw 0 ; pointer to background3
NEWSYM bg4ptrd, dw 0 ; pointer to background4
NEWSYM bg1scsize, db 0 ; bg #1 screen size (0=1x1,1=1x2,2=2x1,3=2x2)
NEWSYM bg2scsize, db 0 ; bg #2 screen size (0=1x1,1=1x2,2=2x1,3=2x2)
NEWSYM bg3scsize, db 0 ; bg #3 screen size (0=1x1,1=1x2,2=2x1,3=2x2)
NEWSYM bg4scsize, db 0 ; bg #4 screen size (0=1x1,1=1x2,2=2x1,3=2x2)
NEWSYM bg1objptr, dw 0 ; pointer to tiles in background1
NEWSYM bg2objptr, dw 0 ; pointer to tiles in background2
NEWSYM bg3objptr, dw 0 ; pointer to tiles in background3
NEWSYM bg4objptr, dw 0 ; pointer to tiles in background4
NEWSYM bg1scrolx, dw 0 ; background 1 x position
NEWSYM bg2scrolx, dw 0 ; background 2 x position
NEWSYM bg3scrolx, dw 0 ; background 3 x position
NEWSYM bg4scrolx, dw 0 ; background 4 x position
NEWSYM bg1sx, dw 0 ; Temporary Variable for Debugging purposes
NEWSYM bg1scroly, dw 0 ; background 1 y position
NEWSYM bg2scroly, dw 0 ; background 2 y position
NEWSYM bg3scroly, dw 0 ; background 3 y position
NEWSYM bg4scroly, dw 0 ; background 4 y position
NEWSYM addrincr, dw 2 ; vram increment (2,64,128,256)
NEWSYM vramincr, db 0 ; 0 = inrement at 2118/2139, 1 = 2119,213A
NEWSYM vramread, db 0 ; previous character for vram read
NEWSYM vramaddr, dd 0 ; vram address
NEWSYM cgaddr, dw 0 ; cg (palette) address
NEWSYM cgmod, db 0 ; if cgram is modified or not
NEWSYM scrnon, dw 0 ; main & sub screen on
NEWSYM scrndist, db 0 ; which background is disabled
NEWSYM resolutn, dw 224 ; screen resolution
NEWSYM multa, db 0 ; multiplier A
NEWSYM diva, dw 0 ; divisor C
NEWSYM divres, dw 0 ; quotent of divc/divb
NEWSYM multres, dw 0 ; result of multa * multb/remainder of divc/divb
NEWSYM latchx, dw 0 ; latched x value
NEWSYM latchy, dw 0 ; latched y value
NEWSYM latchxr, db 1 ; low or high byte read for x value
NEWSYM latchyr, db 1 ; low or high byte read for y value
NEWSYM frskipper, db 0 ; used to control frame skipping
NEWSYM winl1, db 0 ; window 1 left position
NEWSYM winr1, db 0 ; window 1 right position
NEWSYM winl2, db 0 ; window 2 left position
NEWSYM winr2, db 0 ; window 2 right position
NEWSYM winbg1en, db 0 ; Win1 on (IN/OUT) or Win2 on (IN/OUT) on BG1
NEWSYM winbg2en, db 0 ; Win1 on (IN/OUT) or Win2 on (IN/OUT) on BG2
NEWSYM winbg3en, db 0 ; Win1 on (IN/OUT) or Win2 on (IN/OUT) on BG3
NEWSYM winbg4en, db 0 ; Win1 on (IN/OUT) or Win2 on (IN/OUT) on BG4
NEWSYM winobjen, db 0 ; Win1 on (IN/OUT) or Win2 on (IN/OUT) on sprites
NEWSYM wincolen, db 0 ; Win1 on (IN/OUT) or Win2 on (IN/OUT) on backarea
NEWSYM winlogica, db 0 ; Window logic type for BG1 to 4
NEWSYM winlogicb, db 0 ; Window logic type for Sprites and Backarea
NEWSYM winenabm, db 0 ; Window logic enable for main screen
NEWSYM winenabs, db 0 ; Window logic enable for sub screen
NEWSYM mode7set, db 0 ; mode 7 settings
NEWSYM mode7A, dw 0 ; A value for Mode 7
NEWSYM mode7B, dw 0 ; B value for Mode 7
NEWSYM mode7C, dw 0 ; C value for Mode 7
NEWSYM mode7D, dw 0 ; D value for Mode 7
NEWSYM mode7X0, dw 0 ; Center X for Mode 7
NEWSYM mode7Y0, dw 0 ; Center Y for Mode 7
NEWSYM JoyAPos, db 0 ; Old-Style Joystick Read Position for Joy 1 & 3
NEWSYM JoyBPos, db 0 ; Old-Style Joystick Read Position for Joy 2 & 4
NEWSYM compmult, dd 0 ; Complement Multiplication for Mode 7
NEWSYM joyalt, db 0 ; temporary joystick alternation
NEWSYM wramrwadr, dd 0 ; continuous read/write to wram address
NEWSYM dmadata, times 129 db 0h ; dma data (written from ports 43xx)
NEWSYM irqon, db 0 ; if IRQ has been called (80h) or not (0)
NEWSYM nexthdma, db 0 ; HDMA data to execute once vblank ends
NEWSYM curhdma, db 0 ; Currently executed hdma
NEWSYM hdmadata, times 8*19 db 0 ; 4 dword register addresses, # of bytes to
; transfer/line, address increment (word)
NEWSYM hdmatype, db 0 ; if first time executing hdma or not
NEWSYM coladdr, db 0 ; red value of color to add
NEWSYM coladdg, db 0 ; green value of color to add
NEWSYM coladdb, db 0 ; blue value of color to add
NEWSYM colnull, db 0 ; keep this 0 (when accessing colors by dword)
NEWSYM scaddset, db 0 ; screen/fixed color addition settings
NEWSYM scaddtype, db 0 ; which screen to add/sub
NEWSYM Voice0Disabl2, db 1 ; Disable Voice 0
NEWSYM Voice1Disabl2, db 1 ; Disable Voice 1
NEWSYM Voice2Disabl2, db 1 ; Disable Voice 2
NEWSYM Voice3Disabl2, db 1 ; Disable Voice 3
NEWSYM Voice4Disabl2, db 1 ; Disable Voice 4
NEWSYM Voice5Disabl2, db 1 ; Disable Voice 5
NEWSYM Voice6Disabl2, db 1 ; Disable Voice 6
NEWSYM Voice7Disabl2, db 1 ; Disable Voice 7
NEWSYM oamram, times 1024 db 0 ; OAMRAM (544 bytes)
NEWSYM cgram, times 512 db 0 ; CGRAM
NEWSYM pcgram, times 512 db 0 ; Previous CGRAM
NEWSYM vraminctype, db 0
; New variables
NEWSYM vramincby8on, db 0 ; if increment by 8 is on
NEWSYM vramincby8left, db 0 ; how many left
NEWSYM vramincby8totl, db 0 ; how many in total (32,64,128)
NEWSYM vramincby8rowl, db 0 ; how many left in that row (start at 8)
NEWSYM vramincby8ptri, dw 0 ; increment by how many when rowl = 0
NEWSYM nexthprior, db 0
NEWSYM doirqnext, db 0
NEWSYM vramincby8var, dw 0
NEWSYM screstype, db 0
NEWSYM extlatch, db 0
NEWSYM cfield, db 0
NEWSYM interlval, db 0
NEWSYM HIRQLoc, dw 0 ; HIRQ X location
NEWSYM KeyOnStA, db 0
NEWSYM KeyOnStB, db 0
NEWSYM SDD1BankA, db 0
NEWSYM SDD1BankB, db 1
NEWSYM SDD1BankC, db 2
NEWSYM SDD1BankD, db 3
NEWSYM vramread2, db 0 ; previous character for vram read
NEWSYM nosprincr, db 0
NEWSYM poamaddrs, dw 0
NEWSYM tempdat, times 480 db 0 ; expandable area
num2writeppureg equ $-sndrot
; pharos equ hack *sigh*
NEWSYM PHnum2writeppureg, dd num2writeppureg
NEWSYM scrndis, db 0 ; which background is disabled
ALIGN32
NEWSYM oamaddr, dd 0 ; oam address
NEWSYM bg1ptrx, dd 0 ; pointer to background1
NEWSYM bg2ptrx, dd 0 ; pointer to background2
NEWSYM bg3ptrx, dd 0 ; pointer to background3
NEWSYM bg4ptrx, dd 0 ; pointer to background4
NEWSYM bg1ptry, dd 0 ; pointer to background1
NEWSYM bg2ptry, dd 0 ; pointer to background2
NEWSYM bg3ptry, dd 0 ; pointer to background3
NEWSYM bg4ptry, dd 0 ; pointer to background4
NEWSYM Voice0Disable, db 1 ; Disable Voice 0
NEWSYM Voice1Disable, db 1 ; Disable Voice 1
NEWSYM Voice2Disable, db 1 ; Disable Voice 2
NEWSYM Voice3Disable, db 1 ; Disable Voice 3
NEWSYM Voice4Disable, db 1 ; Disable Voice 4
NEWSYM Voice5Disable, db 1 ; Disable Voice 5
NEWSYM Voice6Disable, db 1 ; Disable Voice 6
NEWSYM Voice7Disable, db 1 ; Disable Voice 7
NEWSYM BG116x16t, db 0
NEWSYM BG216x16t, db 0
NEWSYM BG316x16t, db 0
NEWSYM BG416x16t, db 0
NEWSYM SPC700read, dd 0
NEWSYM SPC700write, dd 0
NEWSYM JoyCRead, db 0
NEWSYM ClearRegs
mov word[VIRQLoc],0
mov word[bg1ptr],0
mov word[bg2ptr],0
mov word[bg3ptr],0
mov word[bg4ptr],0
mov word[bg1ptrb],0
mov word[bg2ptrb],0
mov word[bg3ptrb],0
mov word[bg4ptrb],0
mov word[bg1ptrc],0
mov word[bg2ptrc],0
mov word[bg3ptrc],0
mov word[bg4ptrc],0
mov word[bg1ptrd],0
mov word[bg2ptrd],0
mov word[bg3ptrd],0
mov word[bg4ptrd],0
mov word[bg1objptr],0
mov word[bg2objptr],0
mov word[bg3objptr],0
mov word[bg4objptr],0
ret
reg2100r:
mov al,[vidbright]
or al,[forceblnk]
ret
; Multiply Result Low
reg2134r:
checkmultchange
mov al,[compmult]
ret
; Multiply Result Middle
reg2135r:
checkmultchange
mov al,[compmult+1]
ret
; Multiply Result High
reg2136r:
checkmultchange
mov al,[compmult+2]
ret
; Software latch for horizontal/vertical counter
reg2137r:
; mov byte[debstop3],1
cmp byte[debuggeron],1
je .debugger
xor ebx,ebx
mov bl,[cycpl]
sub bl,dh
add bx,bx
mov [latchx],bx
mov bx,[curypos]
mov [latchy],bx
mov bl,[INTEnab]
and bl,30h
cmp bl,30h
jne .novhirq
cmp word[HIRQLoc],0F0h
ja .incry
cmp dh,20
jae .noincly
.incry
inc word[latchy]
.novhirq
.noincly
xor al,al
mov byte[extlatch],0
ret
.debugger
debblah:
xor ebx,ebx
mov bl,[cycpl]
sub bl,[pdh]
add bx,bx
mov [latchx],bx
mov bx,[curypos]
mov [latchy],bx
mov bl,[INTEnab]
and bl,30h
cmp bl,30h
jne .novhirq
cmp word[HIRQLoc],0F0h
; ja .incry
cmp word[latchx],80
; jb .noincly
.incry
inc word[latchy]
.novhirq
.noincly
xor al,al
mov byte[extlatch],0
ret
push eax
push edx
xor eax,eax
xor ebx,ebx
mov al,[cycpl]
sub al,[pdh]
mov bx,339
mul bx
xor ebx,ebx
mov bl,[cycpl]
div bx
mov [latchx],ax
pop edx
pop eax
mov bx,[curypos]
mov [latchy],bx
mov bl,[INTEnab]
and bl,30h
cmp bl,30h
jne .novhirq2
cmp word[HIRQLoc],0F0h
ja .incry2
cmp word[latchx],80
jb .noincly2
.incry2
inc word[latchy]
.novhirq2
.noincly2
xor al,al
mov byte[extlatch],0
ret
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