DIYbanter - View Single Post

mike[_22_]

On 4/2/2017 12:28 PM, wrote:
On Sat, 1 Apr 2017 15:15:19 -0700, John Robertson
wrote:

On 2017/04/01 12:52 PM, wrote:
The replacement circuit board arrived yesterday afternoon. I very
carefully grounded myself as well as the new and old boards. Then,
taking the care of a watchmaker, removed and inserted the 6 EPROMs.
Upon firing up the machine NO MACHINE ERROR! Cool. Now I'm gonna buy
an EPROM programmer and learn how to copy all the EPROMS in the
machine. Thanks everybody for the good advice.
Eric

What type of EPROMs are used? If from the 70s could be 2716s, 2532s,
2732s or possibly 2764s. Early 70s might be 1702As.

Not all programmers can read the early parts - 1702A, 2716, or 2532 so
do check the number on the EPROM before investing in the wrong burner!

John :-#)#
The EPROMs are the 2716 so I had better check.
Thanks,
Eric

Keep your eyes out for a UV EPROM eraser.
If you're ever gonna do anything with those bits you saved,
you're gonna need one.