I don't mind having to divide the clock externally, I can just connect the oscillator to the clock input on a counter and divide it down to the frequency that I want. To get components I go to a liquidation outlet that has a whole floor full of electronics and get parts for much cheaper than ...

No, unfortunately I wasn't able to find one when I went to get components last week. They seemed to have eliminated a large ammount of their ic's since I last went there. All I managed to find from the 65xx family was a handful of 6529's and a couple of 6530's. The only UART's I found were 8250's ...

That would be great. I am very interested to see how to interface to and program a 6850.

Could you post some schematics and code for how to do that? The last few times I tried to use an 8250, I couldn't get it to work properly. Maybe I was doing something wrong, but anything has to be easier than using a 6402.

Which is easier to interface to, a 6850 or an 8251?

I just got an Apple //e and the keyboard doesn't seem to respond to anything that I type, that is, nothing I type comes up on the screen, all I get is the blinking cursor. Any ideas?

I was googling for datasheets on MOS's custom chips, and found this site.
http://highgate.comm.sfu.ca/~rcini/clas ... y_docs.htm
Mike or someone should contact him to put all of these excellent datasheets and scans of AIM65 manuals in the documents section. I found it to be very helpful.

I'm going to go to a liquidation outlet this friday to get some chips for my 6502 computer. Are there any rare/useful/prototype chips that I should look out for?
I already plan to get 6522's, 6551's, and oscillators. Any other suggestions would be wonderful.

How do you use an 8250A with a 6502, as the only clock it has is for the baud generator?

Writing to the ROM address sets the page latch, reading from the ROM address reads the ROM.


I want to be able to read the latch as well, so I can easily figure out what page I'm on. That's why I was thinking of using the ram, I could have a buffer so it writes to both the ram and the latch, and ...

I've been kicking around the idea of building a 6502 computer for over a year now, and I started learning 6502 asm a couple of weeks ago.
I know what I want, but I wanted to check and make sure that it should work, before I start, as I am on a very tight budget.
I have a potential memory map,(this ...