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c64.asm

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+; c64.asm - Useful dasm macros and definitions for C64 programs
+; will likely grow as I do more with the C64.
+; you can INCLUDE this file or just copy the parts you want.
+; This file is CC0 (Public Domain)
+
+; KERNAL functions
+CHROUT  = $FFD2
+ACPTR	= $FFA5
+CHKIN	= $FFC6
+CHKOUT	= $FFC9
+CHRIN	= $FFCF
+CHROUT	= $FFD2
+CIOUT	= $FFA8
+CINT	= $FF81
+CLALL	= $FFE7
+CLOSE	= $FFC3
+CLRCHN	= $FFCC
+GETIN	= $FFE4
+IOBASE	= $FFF3
+IOINIT	= $FF84
+LISTEN	= $FFB1
+LOAD	= $FFD5
+MEMBOT	= $FF9C
+MEMTOP	= $FF99
+OPEN	= $FFC0
+PLOT	= $FFF0
+RAMTAS	= $FF87
+RDTIM	= $FFDE
+READST	= $FFB7
+RESTOR	= $FF8A
+SAVE	= $FFD8
+SCNKEY	= $FF9F
+SCREEN	= $FFED
+SECOND	= $FF93
+SETLFS	= $FFBA
+SETMSG	= $FF90
+SETNAM	= $FFBD
+SETTIM	= $FFDB
+SETTMO	= $FFA2
+STOP	= $FFE1
+TALK	= $FFB4
+TKSA	= $FF96
+UDTIM	= $FFEA
+UNLSN	= $FFAE
+UNTLK	= $FFAB
+VECTOR	= $FF8D
+
+; Macros
+    MAC BasicUpstart
+    ; writes a C64 BASIC start script for the address provided as an argument.
+    ; Usage:
+    ;     org $0801
+    ;     BasicUpstart init
+    ; init:
+    ;   [your code here]
+    dc.w .nextline
+    dc.w 10 ; Line Number
+    dc.b $9e ; SYS
+    dc.b <((({1} / 1000) % 10) + $30)
+    dc.b <((({1} / 100 ) % 10) + $30)
+    dc.b <((({1} / 10  ) % 10) + $30)
+    dc.b <((({1}       ) % 10) + $30) ; Address, converted to 4 PETSCII bytes
+    dc.b 0
+.nextline:
+    dc.w 0
+    ENDM

readme.md

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+# dasm-c64
+
+macros and definitions for the c64 for the dasm 6502 assembler.
+
+## Current contents
+
+* Definitions for all the KERNAL routines so they can be used by name (see https://www.c64-wiki.com/wiki/Kernal)
+* BasicUpstart macro: Writes a BASIC start script for the address provided as an argument.