64k is not enought...



I agree. In the Amstrad CPC6128 (128K RAM), they used a Z80 (like the 6502, it can only access 64k of RAM). They set its hardware up somehow so it could switch between several banks, all made from 16k (from what I can remember). This 'switching' was controlled by a memory ...

I have just reacently recieved an Apple ][ clone. I had a look inside it and found the 6502 but to my surprise a Z80 was there too.

I understand the original Apple ][ was 6502 based, what's the Z80 doing there?

I know its unrelated but Visual BASIC?

THX 1.0E+6

This will realy help. I like the logic behind the LED indicator circuit, very simple.

I made an attempt to make a simple 4-bit adding device. I fried all five chips (actually they just got VERY hot then made the outputs link directly to V+).

When you refur to 'making' 6502's, do you mean making them directly from NOT AND OR and XOR chips, by buying arithmetic chips or doing ...

I have found my 6502's inside a Commodore 1541 floppy drive and a Commodore VIC-20 (remember them?).

You shouldn't have any problems removing the 6502 from the VIC (finding one on the other hand...)

If you find a 1541 drive, make sure its the old grey ones with the built in power supply, not the ...

I was just about to make something similar. However I am going to set it up so there is a sort of 20x2 LCD alphanumeric display emulator, like on some laser printers. I intend to use it to perfect my programming as a friend and I are going to attempt to make a simple 6502 microcomputer.

Actually I ...

Has anyone got a good clock schematic that WORKS?

I have tried to use the typical 1MHz crystal with the NOT gates. I don't think it works. How would I make a reliable clock circuit and how would I test it? I don't have immidiate access to an CRO.

Would a fast 555 timer circuit suffice?

I have ...