A500 keyboard membrane - pc kb adapter built (help)

[rkauer]

 U can uz this very simple hack.

 The things u must have are:

 - A PIC programmer board (it's bloody simple to make one, btw, and very cheap to buy one);

 - A peecee OR Amiga program to save the .hex to the mini-risc cpu (16c84 or 16F84) via serial port;

 - The parts listed in the archive. :roll:

[rkauer]

7407, or 74LS07 (LS means low schottky), or 5407, or 54LS07 will do the trick.

 They are TTL chips.

 Prefer the ls version. IF you are a very lucky guy, you can even find the military version (5407 or 54LS07). Mil-spec jokes, here I come... :-)

[rkauer]

odious wrote:
I got an LS. What is so special about those military version chips? Are they less prone to faults?

 MIL-spec :-D versions are more tolerant to voltage variations (don't count on it) and heat range (no doubt about this).

 They are made in ceramic dies, oposed to plastic dies in regular versions.

[rkauer]

 Buy a serial OR USB pic programmer from anywhere.

 A tip: look for it on Ebay, those programmers are common as mud.