Subject: Re: [stella] SRAM cart for 2600? From: Sark <ian.primus@xxxxxxx> Date: Tue, 29 May 2001 17:34:31 -0500 |
Thank you very much for your wonderful schematics... but I think I goofed somewhere in the base unit. I can't read or write carts. I tried writing a few games to the RAM cart, and it just said that all the bytes were bad. I also tried reading PacMan and Combat, and neither worked in an emulator. It also thinks that there is a 2k cart in the thing all the time, even when there isn't a cart in it. Did I wire a connector backward? Any ideas? Thanks! Ian Primus ian.primus@xxxxxxx Maximiliam Luppe wrote: > Hi, every body. I finished the 4KCart schematic for any 8k*8 SRAM (with 28 > pins). It can be found at: > > ftp://kew.sel.eesc.sc.usp.br/Electric/Atari2600/SRAM-Cart/4KCart.zip > > A modified version for 32k*8 SRAM (28 pins) can be found at: > > ftp://kew.sel.eesc.sc.usp.br/Electric/Atari2600/SRAM-Cart/4KCart-32Kx8.zip > > It's possible to store eight 4k games in the 32k*8 SRAM. Just add 2 new > switch to the lines A13 and A14 of the SRAM (just like line A12). You can > use the two inverters of the 74HC14 that are unused. Good Luck. > > Max > > -----Mensagem Original----- > De: "Gonzalo" <horcas@xxxxxxxxxxxxxxxxxx> > Para: <stella@xxxxxxxxxxx> > Enviada em: Quinta-feira, 26 de Abril de 2001 03:17 > Assunto: RE: [stella] SRAM cart for 2600? > > > > Once I get it > > > working, I will be creating a web site documenting the process, and I > will > > clean > > > up these schematics a little, etc. Thanks! > > > > I'll be waiting for it! I'm trying to build the SRAM cart too, I have the > 6 > > chips (SRAM HM6264LP-70 8K*8 included)... and spent $8.91 for it (dollars) > > so I really hope it works... > > The SRAM cost $3.9095, it's not too much. My idea was to get a > supercharger > > but it will cost $100 exactly to me (shipping and stuffs), so the SRAM > cart > > will be a good deal if it works. > > Next step is to make the PCBs (hard to design) and I have the same > questions > > you have about unlabeled parts. > > > > Good Luck for you! > > > > > > - > > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > > Unsub & more at http://www.biglist.com/lists/stella/ > > > > - > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://www.biglist.com/lists/stella/ - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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