t0ri

Hello, I would like to ask if anyone has a damaged PCspeed and could sell it or give it away for educational purposes. Thank You in advance t0ri

Hello, This solution is really simplest one 🙂 You should remember that DMA chip is working almost on the vedge of its possibilities, therefore any connections must be short as possible. Any cable may introduce noise causing errors. I want to warn anyone who will use this interface with Atari older than STe serie because lack of DMA lines buffering. In case of errors, there is a need to pull-up data lines to +Vcc using resistor pack 1x9 soldered directly to data pins of WD1772. Atari STe and up have DMA data lines buffered. Regards tOri

Hello, @snarkdluG - I found on exxos's site that You don't know how to solder DB19 plug to PCB. Simplest way used by me is: - pull the pins out of the goldpin connector (header - see attached pic) - solder pins first to DB19M plug - solder complete plug to PCB in row CLOSER to xilinx like that on Peter's photo (TOP of PCB) - cut the ends of pins and all is ready. If You need parallel ACSI bus - prepare the DB19F socket in the same way as the DB19 plug and solder the bottom side of the PCB in the row closer to the edge of the board. Thanks to Peter for awesome soft- and hardware. He's projects are awesome and worth of interest.