Vintage Simmons Drums (UK) Users Group

hello@all
i am german and need help:

i will use 27256 and 27512 eproms on my sds9,
but i will not kill it, ;-)

how can i modify the eprom to switch the banks in the eprom ???

thx@all  :-)

Eprom rom-files and simmons manuals find here:

http://www.simmonsmuseum.com/

any help to:

laummmi@...