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| Does anyone recognise this logo? DD? |
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| TomS_:
--- Quote from: GlennSprigg on December 04, 2020, 12:03:51 pm ---I TRIED!! (but failed..) --- End quote --- You sort of beat me to it. I was going to try this, but given I couldnt really find anything to begin with I didnt fancy my chances - as you found out. Strange that even though they are still an active company, google knows nothing about them! Probably they will now though. ;D |
| TomS_:
--- Quote from: Labrat101 on December 03, 2020, 03:49:19 pm ---Do a close up of the bottom of the card as well . Some times it can be helpful :-+ --- End quote --- There really is nothing on the back to help, just the model number of the card! :) edit: srsly wtf eevblog. A tiny bit of skin from my hand and my image "fails security checks"?? |
| TomS_:
--- Quote from: CJay on December 04, 2020, 02:05:26 pm ---Now I need to know if they've got schematics available :) --- End quote --- Ive sent them an email to ask for datasheets/schematics if they have them. Lets see how I get on. :-+ |
| CJay:
TBF, there's very little to it, 32 identical looking Opto isolated ports with some simple protection, connected to the PIO chips, buffered 8 bit databus via the LS245,, some address/select decoding via PAL/GAL IC4 and that's about all she wrote, it's a nice exercise to reverse it and if you've a retro habit then it'd make a nice IO card for a homebrew computer, the DIN connectors are still available... |
| TomS_:
Yeah. Im doing a lot of retro type stuff lately, which is largely the reason why I picked these up. It has all been reasonably predictable given that Ive studied the PRO-LOG datasheets for similar cards a bit. Actually Im more interested to see how close I got with the control signals themselves, because the rest of the circuitry Ive been able to figure out quite easily. Ive made some educated guesses based on what I observed while playing with the PAL and knowing how the Z80 toggles its signals, if I had the schematic for one of the boards that would at least let me know if I got them right. I probably cant do much with the cards themselves, the bus is non standard, or I would have to build everything to match this bus, but there are parts I could play with. Its more of a distraction than anything else. 2020 doesnt really deserve much attention. :-DD |
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