The ATR8000 had a software uart coded into it's rom. It wasn't any good
over 4800 baud. It would work at higher rates but would overflow if you
tried to download anything.
The ATR8500 is an ATR8000 with a hardware UART and DMA capability. There
was a hard disk interface that worked with several z80 machines including
the ATR8000. The ATR8500 is much smaller than it's predecessor and came
standard with 64k ram. There is a 50-pin dma header on the board for
upgrades but I don't know of any.
The ATR8500 was never released for sale. Only a few went to dealers for
evaluation. Mine is serial number 5 and includes the dealer application
and acceptance sheets as well as schematics and brochures.
>>
>> Never heard of the ATR8500. How did it differe from the 8000?
>It's my understanding that the 8500 had a real serial port and a hard
>drive interface (optional?). I think there was more also. I'd never
>really heard of it until I went looking for info on the 8000. My freind
>ran a BBS off the ATR with a hard drive. I always assumed that it was
>attached to the 8000.
I think the DMA jack was meant for an HDDC but I don't think they ever
made one. My ATR8000 also has the copower 88 board installed with 256k
ram. PKZip runs.....
--
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Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
THETechnoid_at_home.com
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Received on Wed Sep 20 2000 - 09:15:57 BST