Thanks a lot!

Erik

Hey, thanks a lot!

But: STZ-OP-Code is only for 65C02, I guess!

Best

Erik

I cleaned up everything and re-soldered some connections. Now it's fine.

Thanks a lot!

Best Erik

Hello everybody,

here ist the circuit-diagram, and it's really simple for you guys. it's embarrassing for me!

So there's no code needed because of the $ea on the data-bus.
I inspected the address- and data-bus with the connected arduino, like Bean Eater did it.
As I said, on the breadboard it ...

Hello all,

I have something that is driving me crazy and normally I know something about electronics.
On my breadboard I have built a basic circuit for the 6502 which works wonderfully and after a reset and 7 clock cycles it jumps to the reset vector $FFFC/$FFFD. If I build the same circuit on a ...

I have the 65c22N.

And yes, to solve the problem, I schould use a 74LS244.

Thanks a lot!

Best

Erik

Hi there,



I have some strange problems using the 65c22 VIA-Chip.

If I use Port-B to control some LEDs, it works fine.

But if I switch to Port-A, the LEDs shine very weak .

I switched to an original VIA 6522 but it looks the same.



I certainly make a stupid mistake, but I do not find.



Best ...