21 Dec
2012
21 Dec
'12
2:34 a.m.
On Thu, 20 Dec 2012, Richard wrote:
Didn't they also have a binary form of tokenized
BASIC? If so, is it
possible that the opcodes in the ROM are tokenized BASIC and not
directly executable machine code?
I don't think they used BASIC tokens to implement their BASIC interpreter
or ROM packs.
I thought they needed 6800 instruction set
compatability for anyone
who had written assembly language code for the 4051.
AFAIK assembly code for the 4051 (e.g. ROM packs) explicitly don't run on
the 4052. For example, a CALL "EXEC" is not portable between the 6800 and
the bitslice systems.
Isn't understanding the 29xx parts necessary in
order to understand
the 4052 design?
Sure, but the 29xx is not the problem, it's what has been realized with
them. And without schematics and/or service manual (I know that there are
people that have them) I won't be able to understand the processor that
they've built.
We should get these uploaded to bitsavers, then.
Agreed, that is my intention. I'll send them to Al when I'll have read
the remaining ROMs.
Christian