webb

Check 《Microcomputer Principle and Interface Technology》
That's a college cause, maybe a bit hard for you :P

webb
I mean let WR=1, give it continuous sparks, that's how real memory works, but not a single spark

Hey guys! A working RAM!!
Comments? Criticism?

@webb
Check here
http://en.wikipedia.org/wiki/6264




No
You need to choose the chip first. Then tell him 'write', at last sent the data.
That's how a real RAM works

TPT4802:
(write/read)
1.give nothing to #CS, means you choose it now
2.give continuous spark to WR/RD pin, tell 4802 you are going to write/read it
3.Sent some spark to D0~D7 to write/ catch the sparks form D0~D7 to read

A real SRAM, for example 6264
1.when address signal comes, a single single translated form a decoder will sent to #CE, telling the 6264 that he was being choosen (and that is known as the address of the memory chip, for example 0x0F2540E2H)
2.the cpu sent a low amplitude (~0.2V) to #MEMW/#MEMR on the bus, witch is connected to #W/#R, telling 6264 the CPU is going to write /read.
3.the cpu sent the data onto the bus, witch sent to the D0~D7 pin via properly connection to write / data form 6264 was sent to bus, then the CPU will catch them, read it to his registers.

You see? My SRAM was very realistic!!

@webb
:p never mind