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PET 2001

Should the Commodore Plus/4 project be parked to make room for some vintage CBM PET?

pub/cbm/src/pet

Communications Week

These guys

We begin with document preparation and liking the correct vintage.

VIC20 SAVE

VIC20 SAVE

The VIC20 machine is quickly catching up to the AppleII with usable keyboard matrix and other IO improvements incoming.

ben eater

drawing

Learn how computers work by building and programming a computer with the classic 6502 microprocessor.

eater.net 6502

Hurrah, the machine project now has it’s own assembler - burn more ROM

drawing

drawing

loading Little Brickout

an alternative method of manual program entry / pasting is the cassette

the load command reads from cassette

back in the day the cassette came from the shop, or your mates

and FM radio stations popped up blasting 80’s synth pop, yeesh…

drawing

tape counter gets to 1407? umm ok

drawing

1541 blinking leds

Processor diagnostics with precursor, action and status columns.

drawing

VIC20 with json hand label diversions

drawing

1541 drive stepping

The 1541 disk drive has it’s own 6502 CPU and is running virtual in my terminal.

drawing

We single step throught the first instructions, let it run for a bit,

25B4A7 cycles later…

and it returns!

Blinking lights incoming.

VIC-1541

an appleII in my terminal

Winter 2026 and current appleII emulation development ticks all the boxes in nostalgia section.

brickout

I have the terminal mouse mapped to appleII paddle timer, initial findings, woz’s brickout is difficult.

sabotage

Sabotage is in the I cannot wait to see the little guys come raining down. Early days…

screenhole

Educational value of this technique worth a case study.

elite

Only 4 new opcodes added to get this far, too cool for school.

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