Hi All,
I picked up an Ohio 610 memory expansion board. It came with the following PCB attached to PB0 and PB1 on the PIA chip. Would anyone know more about what this might do? It's labelled "VK2RT".
Thanks,
Daniel
Help Identifying OHIO 610 Addon Board
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nauseous
- Posts: 2
- Joined: Tue Dec 03, 2019 8:01 pm
Help Identifying OHIO 610 Addon Board
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RedskullDC
- Posts: 62
- Joined: Thu Jul 18, 2013 11:24 am
- Location: Dorrigo, NSW , Australia
Re: Help Identifying OHIO 610 Addon Board
Hi Daniel,
Fancy seeing you here
The “VK2RT” logo plus the ls123 one-shots makes me inclined to think that the circuit is used to automatically key a transmitter and create fixed length “dits” and “dahs” when sending/receiving Morse code.
The superboard 2 was pretty popular with HAM operators at the time here in Oz, including myself.
I used mine for RTTY and slow scan tv around ‘79.
Cheers,
Leslie
(Ex VK2LR)
Fancy seeing you here
The “VK2RT” logo plus the ls123 one-shots makes me inclined to think that the circuit is used to automatically key a transmitter and create fixed length “dits” and “dahs” when sending/receiving Morse code.
The superboard 2 was pretty popular with HAM operators at the time here in Oz, including myself.
I used mine for RTTY and slow scan tv around ‘79.
Cheers,
Leslie
(Ex VK2LR)
Superboard II - RevD, 8Kb, DABUG monitor ROM.
C1P - RevD, 610, 2 drives, CEGMON.
FPGA C1P/C2/C4. 1-8MHz, 48Kb ram, CEGMON, 16KB Hires.
C1P - RevD, 610, 2 drives, CEGMON.
FPGA C1P/C2/C4. 1-8MHz, 48Kb ram, CEGMON, 16KB Hires.