mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-26 10:49:17 +00:00
142 lines
7.0 KiB
C
142 lines
7.0 KiB
C
; 7800.h
|
|
; Version 1.0, 2019/12/13
|
|
|
|
; This file defines hardware registers and memory mapping for the
|
|
; Atari 7800. It is distributed as a companion machine-specific support package
|
|
; for the DASM compiler. Updates to this file, DASM, and associated tools are
|
|
; available at https://github.com/dasm-assembler/dasm
|
|
|
|
|
|
; ******************** 7800 Hardware Adresses ***************************
|
|
;
|
|
; MEMORY MAP USAGE OF THE 7800
|
|
;
|
|
; 00 - 1F TIA REGISTERS
|
|
; 20 - 3F MARIA REGISTERS
|
|
; 40 - FF RAM block 0 (zero page)
|
|
; 100 - 11F TIA (mirror of 0000-001f)
|
|
; 120 - 13F MARIA (mirror of 0020-003f)
|
|
; 140 - 1FF RAM block 1 (stack)
|
|
; 200 - 21F TIA (mirror of 0000-001f)
|
|
; 220 - 23F MARIA (mirror of 0020-003f)
|
|
; 240 - 27F ???
|
|
; 280 - 2FF RIOT I/O ports and timers
|
|
; 300 - 31F TIA (mirror of 0000-001f)
|
|
; 320 - 33F MARIA (mirror of 0020-003f)
|
|
; 340 - 3FF ???
|
|
; 400 - 47F unused address space
|
|
; 480 - 4FF RIOT RAM
|
|
; 500 - 57F unused address space
|
|
; 580 - 5FF RIOT RAM (mirror of 0480-04ff)
|
|
; 600 - 17FF unused address space
|
|
; 1800 - 203F RAM
|
|
; 2040 - 20FF RAM block 0 (mirror of 0000-001f)
|
|
; 2100 - 213F RAM
|
|
; 2140 - 21FF RAM block 1 (mirror of 0140-01ff)
|
|
; 2200 - 27FF RAM
|
|
; 2800 - 2FFF mirror of 1800-27ff
|
|
; 3000 - 3FFF unused address space
|
|
; 4000 - FF7F potential cartridge address space
|
|
; FF80 - FFF9 RESERVED FOR ENCRYPTION
|
|
; FFFA - FFFF 6502 VECTORS
|
|
|
|
|
|
;****** 00-1F ********* TIA REGISTERS ******************
|
|
|
|
INPTCTRL = $01 ;Input control. In same address space as TIA. write-only
|
|
VBLANK = $01 ;VBLANK. D7=1:dump paddle caps to ground. write-only
|
|
INPT0 = $08 ;Paddle Control Input 0 read-only
|
|
INPT1 = $09 ;Paddle Control Input 1 read-only
|
|
INPT2 = $0A ;Paddle Control Input 2 read-only
|
|
INPT3 = $0B ;Paddle Control Input 3 read-only
|
|
|
|
; ** some common alternate names for INPT0/1/2/3
|
|
INPT4B = $08 ;Joystick 0 Fire 1 read-only
|
|
INPT4A = $09 ;Joystick 0 Fire 1 read-only
|
|
INPT5B = $0A ;Joystick 1 Fire 0 read-only
|
|
INPT5A = $0B ;Joystick 1 Fire 1 read-only
|
|
INPT4R = $08 ;Joystick 0 Fire 1 read-only
|
|
INPT4L = $09 ;Joystick 0 Fire 1 read-only
|
|
INPT5R = $0A ;Joystick 1 Fire 0 read-only
|
|
INPT5L = $0B ;Joystick 1 Fire 1 read-only
|
|
|
|
INPT4 = $0C ;Player 0 Fire Button Input read-only
|
|
INPT5 = $0D ;Player 1 Fire Button Input read-only
|
|
|
|
AUDC0 = $15 ;Audio Control Channel 0 write-only
|
|
AUDC1 = $16 ;Audio Control Channel 1 write-only
|
|
AUDF0 = $17 ;Audio Frequency Channel 0 write-only
|
|
AUDF1 = $18 ;Audio Frequency Channel 1 write-only
|
|
AUDV0 = $19 ;Audio Volume Channel 0 write-only
|
|
AUDV1 = $1A ;Audio Volume Channel 1 write-only
|
|
|
|
;****** 20-3F ********* MARIA REGISTERS ***************
|
|
|
|
BACKGRND = $20 ;Background Color write-only
|
|
P0C1 = $21 ;Palette 0 - Color 1 write-only
|
|
P0C2 = $22 ;Palette 0 - Color 2 write-only
|
|
P0C3 = $23 ;Palette 0 - Color 3 write-only
|
|
WSYNC = $24 ;Wait For Sync write-only
|
|
P1C1 = $25 ;Palette 1 - Color 1 write-only
|
|
P1C2 = $26 ;Palette 1 - Color 2 write-only
|
|
P1C3 = $27 ;Palette 1 - Color 3 write-only
|
|
MSTAT = $28 ;Maria Status read-only
|
|
P2C1 = $29 ;Palette 2 - Color 1 write-only
|
|
P2C2 = $2A ;Palette 2 - Color 2 write-only
|
|
P2C3 = $2B ;Palette 2 - Color 3 write-only
|
|
DPPH = $2C ;Display List List Pointer High write-only
|
|
P3C1 = $2D ;Palette 3 - Color 1 write-only
|
|
P3C2 = $2E ;Palette 3 - Color 2 write-only
|
|
P3C3 = $2F ;Palette 3 - Color 3 write-only
|
|
DPPL = $30 ;Display List List Pointer Low write-only
|
|
P4C1 = $31 ;Palette 4 - Color 1 write-only
|
|
P4C2 = $32 ;Palette 4 - Color 2 write-only
|
|
P4C3 = $33 ;Palette 4 - Color 3 write-only
|
|
CHARBASE = $34 ;Character Base Address write-only
|
|
CHBASE = $34 ;Character Base Address write-only
|
|
P5C1 = $35 ;Palette 5 - Color 1 write-only
|
|
P5C2 = $36 ;Palette 5 - Color 2 write-only
|
|
P5C3 = $37 ;Palette 5 - Color 3 write-only
|
|
OFFSET = $38 ;Unused - Store zero here write-only
|
|
P6C1 = $39 ;Palette 6 - Color 1 write-only
|
|
P6C2 = $3A ;Palette 6 - Color 2 write-only
|
|
P6C3 = $3B ;Palette 6 - Color 3 write-only
|
|
CTRL = $3C ;Maria Control Register write-only
|
|
P7C1 = $3D ;Palette 7 - Color 1 write-only
|
|
P7C2 = $3E ;Palette 7 - Color 2 write-only
|
|
P7C3 = $3F ;Palette 7 - Color 3 write-only
|
|
|
|
|
|
;****** 280-2FF ******* PIA PORTS AND TIMERS ************
|
|
|
|
SWCHA = $280 ;P0+P1 Joystick Directional Input read-write
|
|
CTLSWA = $281 ;I/O Control for SCHWA read-write
|
|
SWACNT = $281 ;VCS name for above read-write
|
|
SWCHB = $282 ;Console Switches read-write
|
|
CTLSWB = $283 ;I/O Control for SCHWB read-write
|
|
SWBCNT = $283 ;VCS name for above read-write
|
|
|
|
INTIM = $284 ;Iterval Timer Read read-only
|
|
TIM1T = $294 ;Set 1 CLK Interval (838 nsec/interval) write-only
|
|
TIM8T = $295 ;Set 8 CLK Interval (6.7 usec/interval) write-only
|
|
TIM64T = $296 ;Set 64 CLK Interval (63.6 usec/interval) write-only
|
|
T1024T = $297 ;Set 1024 CLK Interval (858.2 usec/interval) write-only
|
|
TIM64TI = $29E ;Interrupt timer 64T write-only
|
|
|
|
;XM
|
|
XCTRL = $470 ; 7=YM2151 6=RAM@6k 5=RAM@4k 4=pokey@450 3=hsc 2=cart 1=RoF_bank1 0=RoF_bank2
|
|
|
|
; Pokey register relative locations, since its base may be different
|
|
; depending on the hardware.
|
|
PAUDF0 = $0 ; extra audio channels and frequencies
|
|
PAUDC0 = $1
|
|
PAUDF1 = $2
|
|
PAUDC1 = $3
|
|
PAUDF2 = $4
|
|
PAUDC2 = $5
|
|
PAUDF3 = $6
|
|
PAUDC3 = $7
|
|
PAUDCTL = $8 ; Audio Control
|
|
PRANDOM = $A ; 17 bit polycounter pseudo random
|
|
PSKCTL = $F ; Serial Port control
|