The backup battery should prevent RAM contents from being lost on power down.
Check out STK12C68 chip (8K) as a better alternative.
I used this chip for Vic-20 MegaCart and for a NVRam 8K cart design for Vic-20.
From: torontocbm-bounce@xxxxxxxxxxxxx [mailto:torontocbm-bounce@xxxxxxxxxxxxx]
On Behalf Of Joseph Palumbo
Sent: Saturday, June 06, 2015 7:48 PM
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: A C64 Cartridge Without EPROMs
It looks like a basic RAM Cartridge about 16k....which mean it is wiped out
each time you pull it out or cut the power off. why do you want it and not a
regular type RAM expander?
________________________________
From: Frank Michielli <bigmanfrank@xxxxxxx>
To: TorontoCBM Freelist <torontocbm@xxxxxxxxxxxxx>
Sent: Saturday, June 6, 2015 4:40 PM
Subject: [torontocbm] A C64 Cartridge Without EPROMs
Hello everyone.
I came across this today and was very interest with it.
Has anyone ever seen one before? Anyone knows were to get one/or is selling? Or
making for sale?
http://ar.c64.org/rrwiki/images/5/57/The_Transactor_Vol07_04_1987_Jan_A_C64_Cartridge_without_Eproms.pdf
Let me know.
