13 May
1999
13 May
'99
1:13 p.m.
On May 12, 23:56, Derek Peschel wrote:
- Was the source to the MOS ever released or
reverse-engineered?
It's very well documented but there are some undocumented
features.
(One example came up in the discussion of the Torch
Z-80 card.
It involved interrupts at power-on time, I think.)
The bits that people tend to regard as "undocumented" are mostly the bits
avbout how the interface to a second procvessor (The Tube (TM)) work. But
there are documents that Acorn used to supply on request that describe the
Tube, and the Sideways ROM protocols, etc. I have them.
How about
the source or disassembly for BASIC?
There wasn't a good listing of BASIC. There were two books published by
third parties, but one wasn't very good, and the other was written by
someone whom Acorn knew well, and they persuaded him to drop it before many
were sold. Why? Mainly because it was very specific about addresses of
routines that were going to change in the next version. It would have been
quite misleading in places.
"The Advanced BASIC ROM User Guide" by Colin Pharo, pub. Cambridge
Microcomputer Centre.
"The BASIC ROM User Guide" by Mark Plumbley, pub. Adder.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York