[sdiy] using 6264 Ram

[m.bareille at free.fr]

Hi Dan,


> i am understand this a lot better now however
> the fact that the I/O pins are reading or writing depending on the state
> makes it a bit more complicated.
>
> i am assuming i cant just hook both up to the same pin...


 Use some 74LS240 bi-directional buffers (or equiv)  to wire the SRAM your data
buss and manage the access to different chips to write or read or the data
buss.. Another simple solution is to use a microcontroler  with  bi-directional
ports like a PIC chip ...


> can anyone recommend a schematic that uses SRAM chips?
>

Quantix-8 schematic may be ? ( lamely self promoting again, sorry ... )
http://m.bareille.free.fr/modular1/quantix8/dc_quantix8_v1_1a.pdf

A lot of vintage synths with memory use SRAM chips + latches/buffers to manage
datas/adresses busses to the cpu : Z80 , 8051...

I am thinking about SCI prophets, Oberheim Matrix, Roland Jupiters /JX series 
and many many others in the same range... Check their schematics...

Cheers,

Marc B.