Disabling HP65/67 card reader write protect

[Paul Berger (Canada)]

I have done this on a 97. The write protect switch is wired to pin 3 of the card controller chip. Connecting this pin to ground will defeat copy protection. I am pretty sure that it would be the same for a 67 but I do not have one open at this time. I have never seen the inside of a 65, from Tony Duell's schematic it would appear the write protect works the same way ie a non-protected card would ground the write protect line so could likely be defeated in the same manner, according to the schematic this line goes to pin 2 of the hybrid in the 65.

Paul.