Hallo allemaal, Anthony Beckett put these fotos on the net: http://home.austarnet.com.au/avcaz/max/max.htm Not being familiar with the MultiMax hardware it seemed a nice way to learn about it. I replied to a message with the following but never got a reply :( ========================================================================= >> It would be interesting to learn where in memory this chip is mapped to. >> Could you maybe use a multimeter to figure out the connections between >> the RAM's pins and the cartridge connector and write that down in a >> table? > > For sure, I left my multimeter on all night the other day, so it's flat. > I'll have to buy a 9volt. Get back to you tommorow. Studying the photos the first thing I noticed was that pin 5 of the expansionslot, the R/W line, is not connected. Very strange when there is a SRAM onboard. Pin 21 of the SRAM is the R/W-input and is connected to the DMA-input. The CS- and OE-pin of the SRAM are connected to I/O1. I/O2 goes to jumper J5 and through the solderpad to EXROM I believe? It doesn't make sense to me or somebody is pulling our legs :) ========================================================================= Any explanation is welcome. ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org Message was sent through the cbm-hackers mailing list
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