[Coco] OS9 Pascal

[RJRTTY at aol.com]

In a message dated 8/12/07 11:08:33 A.M. Eastern Daylight Time,  
gene.heskett at verizon.net writes:



>The box?  A Quest Super Elf board, RCA 
>1802 based.   It had a whopping 256 bytes of ram, but had an S-100 buss, so 
I 
>bought  it a backplane, and 4k of 300ns static ram on a board I had to build 
 
>that cost us $300 in the late 70's.  The final code was about 1200  bytes, 
500 
>or more of which were lookup tables for character fonts on  5x7 video 
displays 
>or timing constants.  I also built the video it  needed, a huge 120 line 
>high "8.8" display by hand.  That took 6  bytes of DMA per video frame to 
>service.
 
 
HA!!!
 
you think that's retro?  I am assembling a GENUINE replica of a 
MARK-8.   1 K of 1101 ram and a 8008 processor.   Ok so  maybe it
has a little more ram BUT no S-100 bus.   Just six cards
wired together with bare bus wire so if you make a mistake
it will take you at least 2 hours to get to it to fix it.
 
And the programming is done with mechanical switches and LED
lights to indicate register content and such.   Keyboard optional  !
 
Now you are talking 120mm Howitzer.  Making a  mistake  is not an option.
 
Oh and to  make this more on topic later I will use an old 4k coco1 as  a
remote terminal :)
 
Roy
 



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