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S-RAM module

A project log for PIC MCUs Based Homebrew Computer

The goal: to make a working computer, with a keyboard input, LCD Display output, a compiler and to have fun all the way. NEWBIE ALERT

davedave 01/29/2015 at 22:110 Comments

Tomorrow, after I get home from work, I'm going to pick up some 1N4148 diodes. I need at least 30 of them, for my keyboard matrix, but I better stack up a bit.

Tomorrow, or the day after, I will start implementing S-RAM module. I have a CS18LV02563P low power SRAM. Basically it's a 256K RAM IC, made by Chiplus. I hope I will manage it, or I will have to stick to my eeprom acting as a ram (lower speed). EEPROM is 24LC256 Serial ROM, which will definetly stay, since I want to have some form of permanent data storage for my OS (which will be written using ASM compiler embeded in my computer's firmware).

The plan is to use a different board (a smaller one) for implementing this Random Access Memory, since I want it thurley tested before connecting it with the main board, which will be done through a slot of some sort, so that if I fail at implementing it, I don't mess up my main board too much.

So if everything will go as planned, I will have a S-RAM module done by monday.

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