PDI-464-SP Pure Data LTD WD8250 Intel 8255A-5 Manual anyone?

Posted by investorhalp@reddit | vintagecomputing | View on Reddit | 4 comments

Hello! Anyone has the manual or know anything similar so I could guess how the jumpers work? The Intel 8255A is a general purpose programmable I/O device designed for use with Intel microprocessors. WD8250 Async Communications Elements 

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hlmgcc@reddit

[RAMDisk card](https://books.google.com/books?id=4pAtWRegI1gC&pg=PP44&lpg=PP44&dq=pure+data+ltd+PDI-464-SP&source=bl&ots=VJDpGNJx08&sig=ACfU3U1rdXnHp-11cEV5jO88zBHqwBoRrw&hl=en&sa=X&ved=2ahUKEwjb6Z_Kqe2AAxXTMDQIHc4yDO8Q6AF6BAgFEAM#v=onepage&q=pure%20data%20ltd%20PDI-464-SP&f=false) piggybacking on a Multi I/O board (1x serial and 1x parallel).

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investorhalp@reddit (OP)

wow! auto calendar! thank you that helps a little, I will need to figure out how to enable/disable the ram banks  wow, probably impossible to find that software, pretty cool!

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Ice_BergSlim@reddit

Any identifying information on the other side?

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investorhalp@reddit (OP)

Nada. Green pcb. No numbers at all