Questions tagged [bbc-micro]

For questions about the BBC Micro, programs written for the BBC Micro or peripherals for the BBC Micro.

Filter by
Sorted by
Tagged with
26
votes
3answers
2k views

What's the TUBE interface of the BBC micro all about?

I keep reading of the BBC micro's tube interface that was apparently designed as a co-processor interface to the 6502. I would be interested in what were actual applications of this interface and ...
34
votes
2answers
2k views

What BBC Microcomputer features were requested specifically by BBC engineers?

When requirements for the BBC Microcomputer were developed as part of the BBC Computer Literacy Project, an outline specification was created by an independent consultant, the late John Coll. This ...
14
votes
1answer
778 views

How did the Sideways address space work?

I was researching the BBC Micro when I found the Sideways address space: a 16KiB memory space allowing access to up to 16 16KiB external blocks of ROM (or RAM). But 16 blocks of 16KiB is 256KiB, ...
22
votes
4answers
6k views

Why was IBM BASIC so Huge?

The early versions of Microsoft BASIC required 4KB of ROM, and many versions existed in the 8KB and 16KB size. But Microsoft's IBM BASIC (known as "Cassette BASIC") for the original IBM PC (Model 5150)...
25
votes
2answers
3k views

Was the first ARM "processor" a BBC BASIC program?

The best background I have found so far on the early development of the ARM processor at Acorn comes from this interview with Steve Furber. The interview does not mention the development of the first ...
7
votes
2answers
699 views

What was the title safe area on PAL TV sets?

Computers that used TV sets for display, needed to worry about the title safe area. By consensus, on NTSC sets, it was 200 scan lines, or 192 if you wanted to play it really safe. What was the ...
13
votes
2answers
703 views

Reading the BBC Domesday Project

In 1986, the 900th anniversary of the original Domesday Book, the BBC coordinated a project to document modern Britain. This was claimed to be data to last for the next thousand years. Data was ...
5
votes
1answer
516 views

Cost differential between 2 and 4 MHz RAM chips in 1982

The most common speed of the 6502 was 1 MHz, allowing the use of 2 MHz RAM chips (half the bandwidth went to the video chip to refresh the screen). In 1982, the BBC Micro shipped, with double speeds ...