ot? Simulate something....

Ron Hudson ron.hudson at sbcglobal.net
Tue Mar 8 08:21:35 CST 2005


On Mar 7, 2005, at 8:30 PM, woodelf wrote:

> Ron Hudson wrote:
>
>>
>> On Mar 7, 2005, at 5:32 PM, Tom Jennings wrote:
>>
>>> On Mon, 7 Mar 2005, Ron Hudson wrote:
>>>
>>>> I am beginning to write a simulator for a "microcomputer", it will 
>>>> feature a
>>>> curses (terminal) front panel. it will be a 12 bit machine. You 
>>>> will be able to
>>>> issue commands to the simulator without stopping the program (for 
>>>> mounting
>>>> virtual paper tapes, printing to files etc)
>>>
>>>
>>> Cool! If you haven't, check out Donald Knuth's fictional MIX
>>> computer.  It's a mishmash of a bunch of "contemporary" (1970s)
>>> architectures. The cool thing about is there is SOFTWARE written
>>> for it, even though it never physically existed.
>>>
>>> There was no physical representation, if you were to make one,
>>> it would add to the coolness of it.
>>
>>
>> Cool is it 12 bit, best expressed as 3 hex digits?
>>
> No ... I think it was decimal or base 64 depending on the computer  
> instruction
> set used. I like decmal machines but thay don't make decimal addressed 
> memory.
> His lateset version is risc machine, a machine I don't like because 
> they have too
> low a instruction density. Now does it really matter if you use hex or 
> octal or what
> ever?

only that the function keys, which will be used to invert bits in the 
switch register
are grouped in fours. only reason. could to a PDP-8 otherwise.

> Ben alias woodelf
>
>




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