68k ASM defines: Difference between revisions

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Here are preliminary ASM defines for memory locations and constants. For detailed descriptions, see [[Memory mapped registers]].
Here are assembly defines/aliases for memory locations and constants. For detailed descriptions, see [[Memory mapped registers]].


This can be made into a file and included in your ASM source code to use register names instead of their (meaningless) addresses in RAM.
These can be copied into a file and included in your assembly project to use register names instead of their (meaningless) addresses.


<pre>
<syntaxhighlight>
    SCB1            equ $0000          ; VRAM, Sprite tilemaps
;Hard DIPs:
    FIXMAP          equ $7000          ; VRAM, Fix map
DIPSW_SETTINGS  equ 0
     SCB2            equ $8000          ; VRAM, Sprite shrink
DIPSW_CHUTES    equ 1
    SCB3            equ $8200          ; VRAM, Sprite Y positions and sizes
DIPSW_CTRL      equ 2
    SCB4            equ $8400          ; VRAM, Sprite X positions
DIPSW_ID0      equ 3
DIPSW_ID1      equ 4
DIPSW_MULTI     equ 5
DIPSW_FREEPLAY  equ 6
DIPSW_FREEZE    equ 7


    RAMSTART        equ $100000        ; User RAM start
;VRAM zones:
    PALETTES        equ $400000        ; Palette RAM start
SCB1            equ $0000  ;Sprite tilemaps
FIXMAP          equ $7000
SCB2            equ $8000  ;Sprite shrink values
SCB3            equ $8200  ;Sprite Y positions, heights and flags
SCB4            equ $8400  ;Sprite X positions


    REG_P1CNT      equ $300000         ; Joystick port 1
;Basic colors:
    REG_DIPSW       equ $300001        ; Dipswitches/Watchdog
BLACK          equ $8000
    REG_SOUND      equ $320000        ; In/Out Z80
MIDRED          equ $4700
    REG_STATUS_A    equ $320001
RED            equ $4F00
    REG_P2CNT      equ $340000         ; Joystick port 2
MIDGREEN        equ $2070
    REG_STATUS_B    equ $380000
GREEN          equ $20F0
    REG_SLOT        equ $380021         ; Slot selection
MIDBLUE         equ $1007
BLUE            equ $100F
MIDYELLOW       equ $6770
YELLOW          equ $6FF0
MIDMAGENTA      equ $5707
MAGENTA        equ $5F0F
MIDCYAN         equ $3077
CYAN            equ $30FF
ORANGE          equ $6F70
MIDGREY         equ $7777
WHITE          equ $7FFF


    REG_DISPENABL  equ $3A0001        ; Video output ON
;Zones:
    REG_DISPDSABL  equ $3A0011        ; Video output OFF
RAMSTART        equ $100000  ;68k work RAM
    REG_SWPROM      equ $3A0013        ; Use ROM vector table
PALETTES        equ $400000  ;Palette RAM
    REG_CRDUNLOCK1  equ $3A0005        ; Allow /WE to pass through to memory card when low
BACKDROP        equ PALETTES+(16*2*256)-2
    REG_CRDLOCK1    equ $3A0015         ; Don't allow /WE to pass through to memory card
MEMCARD         equ $800000  ;Memory card
    REG_CRDLOCK2    equ $3A0007        ; Don't allow /WE to pass through to memory card
SYSROM          equ $C00000  ;System ROM
    REG_CRDUNLOCK1  equ $3A0017        ; Allow /WE to pass through to memory card when high   
    REG_BRDFIX      equ $3A000B        ; Use board fix tileset
    REG_CRTFIX      equ $3A001B        ; Use ROM fix tileset
    REG_SRAMLOCK    equ $3A000D        ; Write-protect SRAM
    REG_SRAMUNLOCK  equ $3A001D        ; Write-unprotect SRAM
    REG_PALBANK1    equ $3A000F        ; Use palette bank 1
    REG_PALBANK0    equ $3A001F        ; Use palette bank 0 (default)


    VRAM_ADDR       equ $3C0000
;Registers:
    VRAM_RW        equ $3C0002
REG_P1CNT      equ $300000
    VRAM_MOD        equ $3C0004
REG_DIPSW      equ $300001  ;Dipswitches/Watchdog
    REG_HBLANKCNT  equ $3C0006
REG_SOUND       equ $320000  ;Z80 I/O
     REG_HBLANKPOS  equ $3C0008
REG_STATUS_A    equ $320001
    REG_IRQACK      equ $3C000C
REG_P2CNT      equ $340000
REG_STATUS_B    equ $380000
REG_POUTPUT     equ $380001  ;Joypad port outputs
REG_SLOT        equ $380021  ;Slot select


    ; BIOS calls
REG_NOSHADOW    equ $3A0001  ;Video output normal/dark
    BIOSF_BOOTSCR  equ $C00438        ; Show bootscreen (and other things)
REG_SHADOW      equ $3A0011
    BIOSF_CRDACCESS equ $C00468 ; Access memory card with specified function (check CRDF)
REG_BRDFIX      equ $3A000B  ;Use embedded fix tileset
    BIOSF_CRDREPORT equ $C0046E ; In case an error occurred ("CARD FULL" etc.), prompt user for action
REG_CRTFIX      equ $3A001B  ;Use game fix tileset
    BIOSF_CLEARFIX  equ $C004C2        ; Clear fix layer
REG_PALBANK1    equ $3A000F  ;Use palette bank 1
    BIOSF_CLEARSPR  equ $C004C8        ; Clear sprites
REG_PALBANK0   equ $3A001F   ;Use palette bank 0 (default)
    BIOSF_UPLOAD   equ $C00546        ; Upload data to DRAM
    BIOSF_CDDACMD   equ $C0056A        ; Issue CDDA command


     BIOS_SYSSTAT   equ $10FD80        ; Word: ?
REG_VRAMADDR    equ $3C0000
REG_VRAMRW      equ $3C0002
REG_VRAMMOD     equ $3C0004
REG_LSPCMODE    equ $3C0006
REG_TIMERHIGH  equ $3C0008
REG_TIMERLOW   equ $3C000A
REG_IRQACK      equ $3C000C
REG_TIMERSTOP  equ $3C000E


    ; Set by BIOSF_? (read player controls)
;System ROM calls:
    BIOS_P1CURRENT equ $10FD95        ; joystick 1 state
SYS_INT1          equ $C00438
    BIOS_P1PREVIOUS equ $10FD96        ; previous joystick 1 state
SYS_RETURN        equ $C00444
     BIOS_P1CHANGE  equ $10FD97        ; joystick 1 state change
SYS_IO            equ $C0044A
     BIOS_P1REPEAT  equ $10FD98        ; joystick 1 repeat
SYS_CREDIT_CHECK equ $C00450
    BIOS_STATCURNT  equ $10FDAC        ; joystick 1/2 start/select
SYS_CREDIT_DOWN  equ $C00456
    BIOS_STATCHANGE equ $10FDAD        ; previous joystick 1/2 start/select
SYS_READ_CALENDAR equ $C0045C  ;MVS only
SYS_CARD          equ $C00468
SYS_CARD_ERROR    equ $C0046E
SYS_HOWTOPLAY     equ $C00474  ;MVS only
SYS_FIX_CLEAR     equ $C004C2
SYS_LSP_1ST      equ $C004C8  ;Clear sprites
SYS_MESS_OUT      equ $C004CE


     ; Memory card related:
;RAM locations:
    BIOS_CRDF      equ $10FDC4 ;8bit: function to perform when calling BIOSF_CRDACCESS, see below table
BIOS_SYSTEM_MODE  equ $10FD80
    BIOS_CRDRESULT  equ $10FDC6 ;8bit: 00 on success, else 80+ and encodes the error, see below table
BIOS_MVS_FLAG    equ $10FD82
    BIOS_CRDPTR    equ $10FDC8         ;32bit: pointer to read from/write to
BIOS_COUNTRY_CODE equ $10FD83
    BIOS_CRDSIZE    equ $10FDCC         ;16bit: how much data to read/write from/to card
BIOS_GAME_DIP     equ $10FD84  ;Start of soft DIPs settings (up to $10FD93)
    BIOS_CRDNGH    equ $10FDCE ;16bit: usually game NGH. Unique identifier for the game that 'owns' the save file
 
    BIOS_CRDFILE    equ $10FDD0         ;16bit: each NGH has up to 16 save 'files' associated with
;Set by SYS_IO:
</pre>
BIOS_P1STATUS  equ $10FD94
BIOS_P1PREVIOUS equ $10FD95
BIOS_P1CURRENT  equ $10FD96
BIOS_P1CHANGE  equ $10FD97
BIOS_P1REPEAT  equ $10FD98
BIOS_P1TIMER    equ $10FD99
 
BIOS_P2STATUS  equ $10FD9A
BIOS_P2PREVIOUS equ $10FD9B
BIOS_P2CURRENT  equ $10FD9C
BIOS_P2CHANGE  equ $10FD9D
BIOS_P2REPEAT  equ $10FD9E
BIOS_P2TIMER    equ $10FD99
 
BIOS_STATCURNT    equ $10FDAC
BIOS_STATCHANGE  equ $10FDAD
BIOS_USER_REQUEST equ $10FDAE
BIOS_USER_MODE    equ $10FDAF
BIOS_START_FLAG  equ $10FDB4
BIOS_MESS_POINT  equ $10FDBE
BIOS_MESS_BUSY    equ $10FDC2
 
;Memory card:
BIOS_CRDF      equ $10FDC4   ;Byte: function to perform when calling BIOSF_CRDACCESS
BIOS_CRDRESULT  equ $10FDC6   ;Byte: 00 on success, else 80+ and encodes the error
BIOS_CRDPTR    equ $10FDC8   ;Longword: pointer to read from/write to
BIOS_CRDSIZE    equ $10FDCC   ;Word: how much data to read/write from/to card
BIOS_CRDNGH    equ $10FDCE   ;Word: usually game NGH. Unique identifier for the game that owns the save file
BIOS_CRDFILE    equ $10FDD0   ;Word: each NGH has up to 16 save files associated with
 
;Calendar, MVS only (in BCD):
BIOS_YEAR      equ $10FDD2  ;Last 2 digits of year
BIOS_MONTH      equ $10FDD3
BIOS_DAY        equ $10FDD4
BIOS_WEEKDAY    equ $10FDD5  ;Sunday = 0, Monday = 1 ... Saturday = 6
BIOS_HOUR      equ $10FDD6  ;24 hour time
BIOS_MINUTE    equ $10FDD7
BIOS_SECOND    equ $10FDD8
 
BIOS_SELECT_TIMER equ $10FDDA  ;Byte: game start countdown
BIOS_DEVMODE      equ $10FE80  ;Byte: non-zero for developer mode
 
;Upload system ROM call:
BIOS_UPDEST    equ $10FEF4  ;Longword
BIOS_UPSRC      equ $10FEF8  ;Longword
BIOS_UPSIZE    equ $10FEFC  ;Longword
BIOS_UPZONE    equ $10FEDA  ;Byte: zone (0=PRG, 1=FIX, 2=SPR, 3=Z80, 4=PCM, 5=PAT)
BIOS_UPBANK    equ $10FEDB  ;Byte: bank
 
SOUND_STOP      equ $D00046
 
;Button definitions:
CNT_UP         equ 0
CNT_DOWN equ 1
CNT_LEFT equ 2
CNT_RIGHT equ 3
CNT_A         equ 4
CNT_B         equ 5
CNT_C         equ 6
CNT_D         equ 7
CNT_START1      equ 0
CNT_SELECT1    equ 1
CNT_START2      equ 2
CNT_SELECT2    equ 3
</syntaxhighlight>
 
==CD only==
 
<syntaxhighlight>
;System ROM calls
SYS_VIDEOEN    equ $C00470
SYS_UPLOAD      equ $C00546  ;Upload to DRAM
SYS_CDDACMD    equ $C0056A  ;Issue CDDA command
 
;DMA:
REG_DMACPYSRC  equ $FF0064
REG_DMAFILDEST  equ $FF0064
REG_DMACPYDEST  equ $FF0068
REG_DMAFILVAL  equ $FF006C
REG_DMASIZE    equ $FF0070
REG_DMASTART    equ $FF0060
 
REG_DISBLSPR    equ $FF0111
REG_DISBLFIX    equ $FF0115
REG_ENVIDEO    equ $FF0119
REG_CDCONFIG    equ $FF011C
 
REG_UPMAPSPR    equ $FF0121
REG_UPMAPPCM    equ $FF0123
REG_UPMAPZ80    equ $FF0127
REG_UPMAPFIX    equ $FF0129
REG_UPUNMAPSPR  equ $FF0141
REG_UPUNMAPPCM  equ $FF0143
REG_UPUNMAPZ80  equ $FF0147
REG_UPUNMAPFIX  equ $FF0149
REG_DISBLIRQ    equ $FF016F
REG_ENZ80      equ $FF0183
 
REG_CDDALEFTL  equ $FF0188  ;CD audio levels
REG_CDDARIGHTL  equ $FF018A
</syntaxhighlight>


[[Category:Code]]
[[Category:Code]]

Latest revision as of 12:46, 28 May 2017

Here are assembly defines/aliases for memory locations and constants. For detailed descriptions, see Memory mapped registers.

These can be copied into a file and included in your assembly project to use register names instead of their (meaningless) addresses.

;Hard DIPs:
DIPSW_SETTINGS  equ 0
DIPSW_CHUTES    equ 1
DIPSW_CTRL      equ 2
DIPSW_ID0       equ 3
DIPSW_ID1       equ 4
DIPSW_MULTI     equ 5
DIPSW_FREEPLAY  equ 6
DIPSW_FREEZE    equ 7

;VRAM zones:
SCB1            equ $0000   ;Sprite tilemaps
FIXMAP          equ $7000
SCB2            equ $8000   ;Sprite shrink values
SCB3            equ $8200   ;Sprite Y positions, heights and flags
SCB4            equ $8400   ;Sprite X positions

;Basic colors:
BLACK           equ $8000
MIDRED          equ $4700
RED             equ $4F00
MIDGREEN        equ $2070
GREEN           equ $20F0
MIDBLUE         equ $1007
BLUE            equ $100F
MIDYELLOW       equ $6770
YELLOW          equ $6FF0
MIDMAGENTA      equ $5707
MAGENTA         equ $5F0F
MIDCYAN         equ $3077
CYAN            equ $30FF
ORANGE          equ $6F70
MIDGREY         equ $7777
WHITE           equ $7FFF

;Zones:
RAMSTART        equ $100000   ;68k work RAM
PALETTES        equ $400000   ;Palette RAM
BACKDROP        equ PALETTES+(16*2*256)-2
MEMCARD         equ $800000   ;Memory card
SYSROM          equ $C00000   ;System ROM

;Registers:
REG_P1CNT       equ $300000
REG_DIPSW       equ $300001   ;Dipswitches/Watchdog
REG_SOUND       equ $320000   ;Z80 I/O
REG_STATUS_A    equ $320001
REG_P2CNT       equ $340000
REG_STATUS_B    equ $380000
REG_POUTPUT     equ $380001   ;Joypad port outputs
REG_SLOT        equ $380021   ;Slot select

REG_NOSHADOW    equ $3A0001   ;Video output normal/dark
REG_SHADOW      equ $3A0011
REG_BRDFIX      equ $3A000B   ;Use embedded fix tileset
REG_CRTFIX      equ $3A001B   ;Use game fix tileset
REG_PALBANK1    equ $3A000F   ;Use palette bank 1
REG_PALBANK0    equ $3A001F   ;Use palette bank 0 (default)

REG_VRAMADDR    equ $3C0000
REG_VRAMRW      equ $3C0002
REG_VRAMMOD     equ $3C0004
REG_LSPCMODE    equ $3C0006
REG_TIMERHIGH   equ $3C0008
REG_TIMERLOW    equ $3C000A
REG_IRQACK      equ $3C000C
REG_TIMERSTOP   equ $3C000E

;System ROM calls:
SYS_INT1          equ $C00438
SYS_RETURN        equ $C00444
SYS_IO            equ $C0044A
SYS_CREDIT_CHECK  equ $C00450
SYS_CREDIT_DOWN   equ $C00456
SYS_READ_CALENDAR equ $C0045C   ;MVS only
SYS_CARD          equ $C00468
SYS_CARD_ERROR    equ $C0046E
SYS_HOWTOPLAY     equ $C00474   ;MVS only
SYS_FIX_CLEAR     equ $C004C2
SYS_LSP_1ST       equ $C004C8   ;Clear sprites
SYS_MESS_OUT      equ $C004CE

;RAM locations:
BIOS_SYSTEM_MODE  equ $10FD80
BIOS_MVS_FLAG     equ $10FD82
BIOS_COUNTRY_CODE equ $10FD83
BIOS_GAME_DIP     equ $10FD84   ;Start of soft DIPs settings (up to $10FD93)

;Set by SYS_IO:
BIOS_P1STATUS   equ $10FD94
BIOS_P1PREVIOUS equ $10FD95
BIOS_P1CURRENT  equ $10FD96
BIOS_P1CHANGE   equ $10FD97
BIOS_P1REPEAT   equ $10FD98
BIOS_P1TIMER    equ $10FD99

BIOS_P2STATUS   equ $10FD9A
BIOS_P2PREVIOUS equ $10FD9B
BIOS_P2CURRENT  equ $10FD9C
BIOS_P2CHANGE   equ $10FD9D
BIOS_P2REPEAT   equ $10FD9E
BIOS_P2TIMER    equ $10FD99

BIOS_STATCURNT    equ $10FDAC
BIOS_STATCHANGE   equ $10FDAD
BIOS_USER_REQUEST equ $10FDAE
BIOS_USER_MODE    equ $10FDAF
BIOS_START_FLAG   equ $10FDB4
BIOS_MESS_POINT   equ $10FDBE
BIOS_MESS_BUSY    equ $10FDC2

;Memory card:
BIOS_CRDF       equ $10FDC4   ;Byte: function to perform when calling BIOSF_CRDACCESS
BIOS_CRDRESULT  equ $10FDC6   ;Byte: 00 on success, else 80+ and encodes the error
BIOS_CRDPTR     equ $10FDC8   ;Longword: pointer to read from/write to
BIOS_CRDSIZE    equ $10FDCC   ;Word: how much data to read/write from/to card
BIOS_CRDNGH     equ $10FDCE   ;Word: usually game NGH. Unique identifier for the game that owns the save file
BIOS_CRDFILE    equ $10FDD0   ;Word: each NGH has up to 16 save files associated with

;Calendar, MVS only (in BCD):
BIOS_YEAR       equ $10FDD2   ;Last 2 digits of year
BIOS_MONTH      equ $10FDD3
BIOS_DAY        equ $10FDD4
BIOS_WEEKDAY    equ $10FDD5   ;Sunday = 0, Monday = 1 ... Saturday = 6
BIOS_HOUR       equ $10FDD6   ;24 hour time
BIOS_MINUTE     equ $10FDD7
BIOS_SECOND     equ $10FDD8

BIOS_SELECT_TIMER equ $10FDDA   ;Byte: game start countdown
BIOS_DEVMODE      equ $10FE80   ;Byte: non-zero for developer mode

;Upload system ROM call:
BIOS_UPDEST     equ $10FEF4   ;Longword
BIOS_UPSRC      equ $10FEF8   ;Longword
BIOS_UPSIZE     equ $10FEFC   ;Longword
BIOS_UPZONE     equ $10FEDA   ;Byte: zone (0=PRG, 1=FIX, 2=SPR, 3=Z80, 4=PCM, 5=PAT)
BIOS_UPBANK     equ $10FEDB   ;Byte: bank

SOUND_STOP      equ $D00046

;Button definitions:
CNT_UP	        equ 0
CNT_DOWN	equ 1
CNT_LEFT	equ 2
CNT_RIGHT	equ 3
CNT_A	        equ 4
CNT_B	        equ 5
CNT_C	        equ 6
CNT_D	        equ 7
CNT_START1      equ 0
CNT_SELECT1     equ 1
CNT_START2      equ 2
CNT_SELECT2     equ 3

CD only

;System ROM calls
SYS_VIDEOEN     equ $C00470
SYS_UPLOAD      equ $C00546   ;Upload to DRAM
SYS_CDDACMD     equ $C0056A   ;Issue CDDA command

;DMA:
REG_DMACPYSRC   equ $FF0064
REG_DMAFILDEST  equ $FF0064
REG_DMACPYDEST  equ $FF0068
REG_DMAFILVAL   equ $FF006C
REG_DMASIZE     equ $FF0070
REG_DMASTART    equ $FF0060

REG_DISBLSPR    equ $FF0111
REG_DISBLFIX    equ $FF0115
REG_ENVIDEO     equ $FF0119
REG_CDCONFIG    equ $FF011C

REG_UPMAPSPR    equ $FF0121
REG_UPMAPPCM    equ $FF0123
REG_UPMAPZ80    equ $FF0127
REG_UPMAPFIX    equ $FF0129
REG_UPUNMAPSPR  equ $FF0141
REG_UPUNMAPPCM  equ $FF0143
REG_UPUNMAPZ80  equ $FF0147
REG_UPUNMAPFIX  equ $FF0149
REG_DISBLIRQ    equ $FF016F
REG_ENZ80       equ $FF0183

REG_CDDALEFTL   equ $FF0188   ;CD audio levels
REG_CDDARIGHTL  equ $FF018A