General public machines (Was: Altair 8800 name Was: Re: Altair 680 Expansion Boards?

geneb geneb at deltasoft.com
Sat Dec 24 09:46:59 CST 2016


On Fri, 23 Dec 2016, Cameron Kaiser wrote:

>>> Commodore's Z80 in the 128 was due to unnecessary fear that they might lose
>>> market share to CP/M, when IBM should have been their big worry.
>>> I don't know all of the details of the ST/Amiga technology swap, but BOTH
>>> were too late, if the primary goal was competing with IBM.
>>
>> That might be Commodore marketing - Bil Herd said that he threw the Z-80
>> into the design essentially because he could. :)  He's done a few talks on
>> how the C-128 came about.  It's pretty interesting.
>
> It also saved the 100% compatibility problem (in this case, with Commodore's
> CP/M cartridge by designing it onto the board, and with Commodore Magic Voice,
> which fouled banking by altering the memory configuration lines in realtime:
> the 8502 would crash, but the Z80's activity would not be detected and the
> C= key could be checked to force a C64 memory map).

Yep.  The group actively kept one step ahead of management to keep them 
from screwing with the project too badly. :)

g.

-- 
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby.  Geeks collect hobbies.

ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://scarlet.deltasoft.com - Get it _today_!


More information about the cctech mailing list