Has anyone seen this mod before? I'm wondering what it was for.
Pins 1 and 2 of IC36 go to pin 10 on the card edge connector, pin 3 of IC36 goes to pin 8 of IC45 via a signal diode and pin L on the edge connector goes to gnd (pins 1,2 & 3 A,B & C) on the edge connector?
IC36 is a 7400 and IC45 is a MC14006B. It looks like a button would go between pin 10 and pin L on the edge connector and would ground the inputs of the nand gate on the 7400 (pins 1 and 2) and the output of this gate (pin 3) goes off to pin 8 of the MC14006B. The terminals on the card edge connector for the jamma adaptor for these two pins aren't used. I'm just wondering if I could remove this mod without causing problems seeing that it's not connected to anything?
Question
BIG Trev
Has anyone seen this mod before? I'm wondering what it was for.
Pins 1 and 2 of IC36 go to pin 10 on the card edge connector, pin 3 of IC36 goes to pin 8 of IC45 via a signal diode and pin L on the edge connector goes to gnd (pins 1,2 & 3 A,B & C) on the edge connector?
IC36 is a 7400 and IC45 is a MC14006B. It looks like a button would go between pin 10 and pin L on the edge connector and would ground the inputs of the nand gate on the 7400 (pins 1 and 2) and the output of this gate (pin 3) goes off to pin 8 of the MC14006B. The terminals on the card edge connector for the jamma adaptor for these two pins aren't used. I'm just wondering if I could remove this mod without causing problems seeing that it's not connected to anything?
Any ideas
Cheers Trev
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