giomba
977c3cf0e6
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| res.org | ||
| src | ||
| util | ||
| .gitignore | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
README.md
snake6502
snake6502 is a snake-like game clone for Commodore home computers, written for fun because «I always wanted to code something for a computer of my retrocomputers collection – actually, this is the main reason I collect them: to write programs».
Compile
You need the dasm macro assembler, then:
$ make
You can also make it output useful extra info with:
$ make debug
Developer docs
Memory map
| Address | PRG | Description |
|---|---|---|
$0000 - $0001 |
no | hardware |
$0002 - $00FF |
no | zero page pointers |
$0100 - $07FF |
no | free ram |
$0800 - $0FFF |
yes | initialized data segment (incl. const) + BASIC autostart |
$1000 - $1FFF |
yes | SID tune |
$2000 - $27FF |
yes | custom char |
$2800 - $xxxx |
yes | program logic (only needed part used) |
$xxxx - $CCFF |
no | free ram |
$CD00 - $CDFF |
no | data segment (not-initialized vars) |
$CE00 - $CEFF |
no | list X |
$CF00 - $CFFF |
no | list Y |
$D000 - $DFFF |
no | I/O |
$E000 - $FFFF |
no | Kernal |
Custom charset
| Index | Description |
|---|---|
$00 - $1F |
A-Z (space first) |
$20 - $3F |
A-Z, reversed (space first) |
$40 - $4F |
hex digits |
$50 - $5F |
hex digits, reversed |
$60 - |
game tiles |