Why was PETSCII based on an obsolete version of ASCII?
Jun 15, 2022 · 24 PETSCII (sometimes PETASCII) is the character set developed by Commodore for use in its microcomputers. The first of these, the PET, started to be developed in early 1976. Why, …
How is PETSCII used by assembly-language programs?
Jul 30, 2019 · The PETSCII encoding is a variation of ASCII, this is used by the builtin operating system for text. But at least the C64 has fonts in a completely different encoding, called "screen codes".
Software to generate C64 BASIC code printing PETSCII art
Nov 21, 2022 · The code generator should run on Linux or Windows, compressing a bigger number of PETSCII graphics by finding common strings, then generating C64 BASIC code containing these …
Bypassing C64's PETSCII to screen code mapping
Sep 27, 2025 · I asked this in stackoverflow and was told to better ask it here. I'll link between these 2 questions, if I get an answer. Sorry. So: In upper-case mode, the C64 PRINT ASC("A") …
What was the purpose and history of the C64's special keys?
Jun 7, 2017 · 6 Background: The Original PET Keyboard and PETSCII Most of these keys have their roots in the original Commodore PET 2001 keyboard: The scanning and conversion was complex …
How does the sequence $C3, $C2, $CD translate to "CBM"?
Apr 1, 2024 · The C64 used PETSCII, not ASCII, as its character set, and most Commodore 6502-based computers had a 'shift' between the normal layout, with uppercase letters at $41 through $5A …
commodore 64 - C64/PETSCII block graphic symbol: was there ever a ...
Jul 23, 2020 · The "PETSCII" encoding is based on keyboard positions of the original PET chicklet keyboard (*1): (Taken from Wikipedia) The keyboard is made similar to basic typewriter keyboards, …
commodore 64 - Why the disparity between the screencodes and the ...
Sep 11, 2018 · Further, the PETSCII encoding corresponded to what the keyboard delivered, and the ROM was organized accordingly. So while it made sense for the first PET, the C64 and other 8-bit …
Commodore 8-bit character sets - Retrocomputing Stack Exchange
Is the character set format same on every Commodore 8-bit computer or are there any character size, character order, or other differences between the machines? I'm purely interested in the charact...
commodore 64 - Retrocomputing Stack Exchange
And if you ask any Commodore computer for the ASC () value of one of those characters, it will report the high-bit value. So the shift key really is a high-bit-toggle key from the PETSCII standpoint, at …