Good luck!
For me, the tricky part has always been the physical/mechanical design - how to fit the parts in the QL case and make reliable connections.
All good fun!
Hardware detectives for FrankenQL?
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martyn_hill
- QL Wafer Drive
- Posts: 1063
- Joined: Sat Oct 25, 2014 9:53 am
Re: Hardware detectives for FrankenQL?
Perhaps I might be wide of the mark - but didn't some 64K DRAMs only need the bottom 7 address lines to be cycled for refresh so it suited Z80 REFRESH hardware? Don't know if this carried through to 256K DRAMS...
edit1: 'address' not 'data'
edit2: Useful site http://www.minuszerodegrees.net/memory/ram.htm
edit1: 'address' not 'data'
edit2: Useful site http://www.minuszerodegrees.net/memory/ram.htm
Last edited by Silvester on Fri Dec 14, 2018 1:48 pm, edited 2 times in total.
David
Re: Hardware detectives for FrankenQL?
Ahhh, good memories... not...
Installing SPEM memories in QLs while knowing how much slower they were. They had crappy pins covered in solder, and the sockets under the 8301 and CPU sucked too, so they were quite troublesome overall.
Installing SPEM memories in QLs while knowing how much slower they were. They had crappy pins covered in solder, and the sockets under the 8301 and CPU sucked too, so they were quite troublesome overall.