Guest
Hi All,
I have in a 1978 model pinball machine, one 1702a.
I would like to backup it contents, but my eprom programmer works with
2716 and later.
My question is -
When I probe the cpu board with a scope, around the eprom, I was
expecting to find 5, -5 and -12.
I only find +5 and -12.
Can I power this device from an external -12 and make a adapter to then
read its contents like a 2716.
I can then program a 2716 and using a couple of sockets, rewire for the
2716 in place of the 1702a.
Any help appreciated.
Kind Regards, Garry
I have in a 1978 model pinball machine, one 1702a.
I would like to backup it contents, but my eprom programmer works with
2716 and later.
My question is -
When I probe the cpu board with a scope, around the eprom, I was
expecting to find 5, -5 and -12.
I only find +5 and -12.
Can I power this device from an external -12 and make a adapter to then
read its contents like a 2716.
I can then program a 2716 and using a couple of sockets, rewire for the
2716 in place of the 1702a.
Any help appreciated.
Kind Regards, Garry