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Questions tagged [commodore-pet]

Questions regarding the Commodore PET range of microcomputers.

3
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1answer
228 views

Transatlantic gray market Commodore PETs and 220V/50Hz vs. 115/60Hz

In the late seventies, Commodore sold the PET in Europe at a considerably higher price than in America; they could get away with this because there was less competition there. Some of the American ...
8
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1answer
311 views

PET game, enemies attempt to break through several concentric sets of walls

I'm looking for another PET game, which I cannot find on various sites. It was one of the earlier ones - it was available when I first got access to the PETs circa 1981/82. The user starts in the ...
8
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1answer
359 views

How did the Commodore PET 80 column display work?

Some variants of the Commodore PET (e.g. the 8000 and 9000 series, as well as some other versions with an aftermarket add-on) produce an 80x25 character display. Their character set is fixed in ROM ...
8
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4answers
558 views

Columns of text in early microcomputers

As discussed in some previous questions here, 80-column text was established by IBM as the standard for business computing as early as the sixties, but monitors capable of displaying that resolution ...
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5answers
8k views

Why were early personal computer monitors not green?

Green was traditionally the most common color for computer monitors; it combines strain-free readability with low cost. Given this, it's surprising that the first versions of the Commodore PET and ...
6
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2answers
678 views

Is it possible to bank out Kernal in Commodore PET, VIC-20 or 264 series computers?

You can bank out Kernal ROM in C64 using $01 register. This was preferred by game/demo coders who wants to employ self tuned routines and wants to expose ram 'underneath'. You can do lda #$35 : sta $...
6
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3answers
411 views

Origin of Dongles

The first time I ever heard of a dongle was when it was used on a text processor called Wordcraft on the Commodore 8032. It was around 1980. We had three machines and had to share the dongle amongst ...
9
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4answers
2k views

Who wrote the MS BASIC on the PET/C64/etc?

I'm wondering if anyone has a document that describes the history of the BASIC interpreters used in the various Commodore 8-bit machines? Ultimately I'm trying to track down how it is that the A% ...
10
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1answer
626 views

PET space arcade game with surprisingly good graphics

We had PET computers in my high school, 4032's IIRC, and a few classic games to go with them - the excellent Space Invaders port, Star Trek of course, and a few others. These all used PETASCII for ...
14
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3answers
779 views

Obscure uses of the Commodore 8050/1541 disk drive

When I was working for a foundry consultancy, we did the following Download routines to add delays when writing certain tracks. This was a security feature. When the program started, it would try ...
9
votes
2answers
640 views

Transferring files between Commodore PET and IBM PC

Suppose you have two early eighties computers, a Commodore PET with 8050 disk drive and an IBM PC with its 5.25" disk drive. Is there a way to transfer files between them? Not machine code programs, ...
11
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4answers
506 views

Is there software that will run across multiple Commodore 8-bit machines without modification?

I noticed in some of the answers in this question that the Commodore 8-bit line apparently used a jump table at $03xx for entry into the kernel ("kernal" for the pedantic) routines. Figuring that the ...
15
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4answers
2k views

Computers with integrated monitor (all-in-one form factor)

The Commodore PET had an all-in-one form factor where the monitor was fused into the rest of the computer, making a single unit, not dissimilar to some early terminals like the VT100. This is ...
8
votes
3answers
402 views

Origin of dealer networks

Roughly speaking, the two main ways to sell computers are, and particularly were in the old days, Three digit price tag sold to individuals => mass market, department stores and suchlike. Four digit ...
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5answers
6k views

Can a PET 2001 be physically damaged from BASIC?

In the early 1980s my primary school was the proud owner of a Commodore PET 2001. There was a commonly held belief among the young geek fraternity that there existed a BASIC command—perhaps a ...
13
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2answers
457 views

What was the end of line convention for text files on the 8-bit Commodores

A two part question: Did an agreed upon convention for end of line (EOL) within text files exist on the 8-bit Commodores? If there was a convention, what was it?
14
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2answers
672 views

What is this code on the zero page that was put there by the BASIC ROM?

(question copied from SO (from the days before RC.SE existed): http://stackoverflow.com/q/31877835/477476) Zero-page memory maps of the PET that I've found claim that the zero page address range$00C2....