trash_44fr

Take a look here.

Hi, You can try to replace the 74LS138 at position H2 and see if the ROM Card in slot 0 is working. You have probably another issue as the Z80 card doesn't work at all.

Speaking of demos, take a look at the French Touch archive & their Youtube channel. You won't be disapointed !

Keep up the good work ! You're almost there.

Thanks !

Hi, Count me in for PAL & NTSC Apple //e. Do I need 2 cards then ?

Great !

Fantastic news !

Congratulations ! You have a IIGS prototype (Cortland). More pictures here. The two wires are part of a fix for the Sound Glu Fix as described on page 2 in this document.

Awesome !

@YannAros beautiful ! Keep up the good work.

But if you take a good look at the upper right chip, it says NEC D780C. This one is a Z80. The card plugs into the 65C02 socket so it has to be relocated on the board. @wins4 You're located in Germany and I see "de" on the card so probably a Z80 clone card made in your country. It seems pretty close to the Cirtech card (almost the same passives components and number of logic ICs) but with a very different layout. On the Cirtech, the Z80 is below the card :

I didn't notice that, that's weird. Upon further investigation, the "standard" 4164 design doesn't often has an extra IC. But I have found this one from A.E. using the 74LS14 : On the opposite side, there is also the "compact" 41464 design without any extra IC : And to add more confusion, another one : So I would say, you have to try ?

Why not using the classic 64 Ko/80 col design from back in the day ?

Hi, I can't see a direct link between the keyboard fault and the disk drive... Maybe one track to follow : the //c is using two round metal washers to make contact between the disk drive and the ground on the motherboard. Misplacing them may result in short circuit. But it can't explain the delay. You can always try to remove them and do a test. My two cents ?