Cryptopunks on the Commodore 64

png to C64 BASIC

This is a Go program will read a 24x24 pixel png image and output a BASIC program that will render it. For example, use this program to convert your favorite "cryptopunk" in to a basic program, that when run, will display your punk to be admired in true 8-bit glory!

(More about the "Cryptopunks" here)

Screenshots

Technical details

The C64 only allows for 16 colors.

The CIEDE2000 algorithm approximates each pixel to a C64 color, thanks to the co-colorful library.

Did you know: The C64 used a color palette that may seem "washed-out"? That's because these colors displayed well on TVs/CRTs of the day. The analog "saturation" dial was used to fine tune them!

A simple Run-length-encoding is used for compressing the image. The BASIC code that this Go program generates implements a decoder with just a bunch of GOTOs.

How to view your Punk

Vice Emulator

https://0xtycoon.github.io/cryptopunksc64/c64.html?file=metadata/55/5537.prg

Chips by floooh

https://0xtycoon.github.io/cryptopunksc64/c64.html?file=metadata/55/5537.prg

Basic Program

You can also view your basic program, they are located in the docs/metadata directory

BASIC Program listing

Here is an example of a generated BASIC program

10 C% = 0 : Y% = 0 : I% = 0
20 READ C
30 IF C = 42069 THEN GOTO 70
32 READ I
33 IF I = 42069 THEN GOTO 70
40 POKE 646, C
50 PRINT CHR$(18) " ";
51 I = I - 1
52 Y = Y + 1
53 IF Y = 24 THEN PRINT ""
54 IF Y = 24 THEN Y = 0
55 IF I <> 0 THEN GOTO 50
60 GOTO 20
70 POKE 781,0:POKE 782,0:SYS 65520:RESTORE:GOTO 10
100 DATA 3, 81, 14, 5, 3, 21, 0, 1
110 DATA 3, 20, 14, 2, 7, 3, 2, 2
120 DATA 3, 16, 14, 3, 7, 3, 2, 3
130 DATA 3, 14, 14, 3, 7, 5, 2, 3
140 DATA 3, 13, 14, 2, 7, 7, 2, 2
150 DATA 3, 13, 0, 1, 5, 9, 0, 1
160 DATA 3, 13, 0, 1, 5, 9, 0, 1
170 DATA 3, 13, 0, 1, 5, 2, 12, 2
180 DATA 5, 3, 12, 2, 0, 1, 3, 12
190 DATA 0, 1, 5, 3, 10, 1, 0, 1
200 DATA 5, 3, 10, 1, 0, 2, 3, 12
210 DATA 0, 1, 5, 3, 12, 1, 5, 4
220 DATA 12, 1, 5, 1, 0, 1, 3, 11
230 DATA 0, 1, 7, 1, 0, 1, 5, 9
240 DATA 0, 1, 3, 12, 0, 3, 5, 4
250 DATA 0, 2, 5, 2, 0, 1, 3, 13
260 DATA 0, 4, 5, 5, 0, 2, 3, 13
270 DATA 0, 11, 3, 13, 0, 5, 2, 3
280 DATA 0, 3, 3, 13, 0, 11, 3, 13
290 DATA 0, 1, 5, 1, 0, 8, 3, 14
300 DATA 0, 1, 5, 1, 0, 8, 3, 14
310 DATA 0, 1, 5, 2, 0, 6, 3, 15
320 DATA 0, 1, 5, 3, 0, 1, 3, 13
330 data 42069

C64 Disk Image demo

See punk64.d64 for the disk image.

Then, LOAD "*",8

and then RUN

Converting basic to PRG

This go program does the conversion from Punk image to BASIC program to PRG file.

(a PRG file is basically a memory-dump of the BASIC program, in bytecode-like form)

prg-tools

Git clone https://github.com/abbrev/prg-tools $ cd prg-tools $ make

From the project dir:

$ prg/prg-tools/bas2prg < docs/metadata/0/0.bas > test.prg $ x64 test.prg

Alternative: tok64

cd tok64 git clone https://github.com/burinm/tok64

make

./tok64 /toprg /64 ../../docs/metadata/0/0.bas

Some emulators to try one https://virtualconsoles.com/online-emulators/c64/

and more https://github.com/Reggino/jsc64/ another https://github.com/nippur72/c64-emu

License

BSD

0xTycoon/cryptopunksc64