What Type of RAM should i be using?

[BigLadWhillis]

pretty self explanatory. Should I Use SRAM, DRAM or a different type?

[thedrip]

For practicality and ease of design, use SRAM. Attach the address and data bus, R/WB qualified by O2 and your Chip select logic and you're running.

If you're worried about being "period correct", use DRAM. There is quite a bit of supporting circuitry needed to refresh the dram that will very much complicate your design.

[BigEd]

Agreed, SRAM is easiest and best for most purposes. And don't worry too much if you don't have a round number: if you buy a 128k SRAM because it's a good price and a good package, and only use 48k of it, that's fine.

[BigDumbDinosaur]

BigLadWhillis wrote:

pretty self explanatory. Should I Use SRAM, DRAM or a different type?

As the others suggested, go with SRAM. SRAM can be gotten in a variety of sizes, with the largest 5 volt-capable size being 512KB. I used a 128KB SRAM in my POC V1 series, grounded A16 and rigged up the glue logic to expose 52KB to the MPU ($0000-$CFFF).

[BigLadWhillis]

Thank you all for the replies, I will most certainly go with SRAM, is the IDT 71256SA a good choice, It does not have 512Kbit of Storage (Half of that) But is one that i can acquire easily, i am not expecting to have 32KB of ram also, Closer To 24KB

[GARTHWILSON]

From a quick (not very detailed) look at the data sheet, it looks like it will be perfectly fine. Do go through the 6502 primer before you get too far though.