[Coco] OS9 Pascal
devries.bob at gmail.com
Sun Aug 12 20:29:02 EDT 2007
Ah, the memories....
My first computer was a DREAM 6800. MC6800 cpu, 1K ram made of two 2114
4-bit chips, 1K rom (2708), and a whopping 64 x 32 DOTS screen, which was
displayed using hardware DMA. Programmed in either hand assembled 6800
machine code, or CHIP-8 high-level (!) language.
Regards, Bob Devries, Dalby, Queensland, Australia
Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.
my blog: http://bdevries.invigorated.org/
----- Original Message -----
From: <RJRTTY at aol.com>
To: <coco at maltedmedia.com>
Sent: Monday, August 13, 2007 7:13 AM
Subject: Re: [Coco] OS9 Pascal
> 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,
>>bought it a backplane, and 4k of 300ns static ram on a board I had to
>>that cost us $300 in the late 70's. The final code was about 1200 bytes,
>>or more of which were lookup tables for character fonts on 5x7 video
>>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
> 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 :)
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