Subject: Re: [stella] RAM Cart? From: Mark De Smet <desmet@xxxxxxxxxxxx> Date: Sat, 16 Jan 1999 14:53:47 -0600 (CST) |
> Does the Supercharger use DRAM or does it use non-battery-backed static RAM? I'm not sure, but it came out late enough for 8k or so of SRAM to not be that expensive.(I think) I would doubt that it used DRAM. The thing with DRAM is that it must be refreshed. Meaning that the extra circuitry must regularly read the data from every cell in the memory and re-write it. During these periods, the VCS wouldn't be able to read. I don't think that it would work here. (It works in a PC because it's memory subsystem has a ready line(or something similar) and the processor stalls while waiting, assuming no cache) > >EPROM or eraseable programmable read only memory can only be programed > It's definitely not useful as a general purpose RAM chip. But perfect for producing games to sell :) > Can one read and write to an EEPROM fast enough to act as general purpose RAM? Nope, and depending on what EEPROM you get, you have to erase whole blocks at a time. I think that there is a limited number of erases to. But it would be neat to build a 'RAM'-type cart with one. Mark -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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