Multiple EPROMs in one large switchable-bank EPROM?

[TTL]

Some drum machine voice boards contain two 2764 EPROMs which can be configured for multiple sounds, longer sounds and so on:




If the voice board is configured for two EPROMs and each socket (U8, U9) is populated with a multi-bank EPROM adapter... could I switch banks of both boards at once simply by joining the 4 MSQ signals together to one DIP switch, like this?

 

[Harald Kapp]

Of course. What makes you think this wouldn't be possible?

 

[TTL]

Just my lack of knowledge, concerned that the 2nd EPROM would be affected by the first one. But I'm learning
Thanks again for confirming.

 

[Sandrow]

Hi all there, found this thread and then subscribed instantly to this forum.

I have an E-MU Drumulator which is basically the same concept, a drum machine based on Eprom sound memory banks.

I have some questions for you.

1) About "Stacking" or "Paging" several codes into one eprom:

@Harald Kapp, You wrote:

"Use the three uppermost bits to emulate 2732 memory chips. 8 images of those will fit into one 27256.
This is very likely the same method used in the circuit in your image using a 27512 chip and the 4 uppermost address bits to select one out of 16 images from 2732 chips."

This doesn't sound clear to me.
In other words, what should I actually must do?

2) Will the scheme with pull ups made by @TTL works on this machine?

Some technical informations about Drumulator here below:





Thank you very much
Cheers.
S.

 

[mahdi93]

sorry guys for stupid question i'm noob on this but here's my idea :
i have .bin file in 27c256 in my car control unit
i wanna make 4 bin file in that control unit ( ecu )
so i should use 1mb eprom right ? i got a 27SF010 because its flashable and it replace the 27c
the 27c256 in DIP28 and the 27SF010 is DIP32
can somone please show me a simple shematic on how to make it work ?