The OSI forums (http://www.osiweb.org/osiforums) had been brought down by spambots, but is now back online.
Dave

When I go to the URL mentioned, I get a 404 - Not Found message.

When I go to http://www.osiweb.org/, I get a directory listing.

I thought you might want to know. In the mean time ...

My (admittedly limited) understanding of the compatibility issues with using the W65C02 chips is 2 things...

First, the current WDC 65c02 does not implement any of the unofficial op-codes. So, if your system is making use of undocumented op-codes from your specific chip, you may find problems ...

This is probably a stupid question and I should finish reading the data sheet for the 6532 but ...

Isn't the 6532 functionally (in terms of features) very similar to the 6522? In terms of features all I see in the 6532 that isn't in the 6522 is 128 bytes of static RAM.

In the case of jknight6's ...

They look promising.

P.S. It took me about 10 seconds to decode the message in your signature.

I'm sure this question has come up in the past but a quick search of the site didn't show anything recent so I'm going to risk getting in trouble by asking...

Can anyone recommend a store or website to order parts from, preferably in Canada? There are a few electronics stores in the GTA (Toronto ...

I challenge anyone to build an 80MHz, fully functional computer using only breadboards as its substrate. You cannot use FPGAs (since in order to couple the FPGA to the board, you'll need to use a PCB, something I must forbid for this challenge for maximum fairness). Good luck.

This might be a ...

8-Bit (one of the more active posters here) built an emulator for one of his SBC projects. I don't have the link handy but I found it through his writeup on the 6502.org site.

Right now, I'm using a windows program called "6502 Macroassembler & Simulator written by Michal Kowalski, his web page is ...

#1. WDC's 6502's are too fast to be using in a solderless breadboard. The big loops of wire give you antennas and inductors all over the place; and the groundbounce, ringing, crosstalk between lines, etc. wreak havoc. There's a rather narrow range of conditions under which the thing will work at ...

I've got a solderless breadboard kit computer with a w65c02s CPU and w65c22s for I/O ( http://www.apatco.com/products.php ). There isn't much room leftover on the board to add more chips and no way to transfer data on or off the system (other than manual entry).

So, I'm wondering if anyone has ...

I'll say yes but I won't promise not to change my mind.

On a related note (the Wiki that is). Would it be appropriate to have individual project stuff on the Wiki? I'm thinking of 8-Bit's sbc and kc's 65816 project. I know they already have web sites for those projects so really don't need to ...

CBMFile has a legal download and, apparently, are still selling GEOS. I couldn't find anything on the API but they might have some information if you were to contact them.

http://cbmfiles.com/geos/index.html

If you use the CPU's stack strictly for holding return information, you'll find that you can nest your subroutines 124 times before you run out of space. That is a huge amount of nesting.

What are the other 4 bytes for? Are they reserved for really badly timed interrupts?

Either way, I believe ...

Your questions should be pretty well answered in the discussion at http://forum.6502.org/viewtopic.php?t=148 . You should get into Forth eventually, which makes heavy but extremely efficient use of stack space. You will find that the 6502 is not short on stack space at all.

Ah, the curse of not ...

I've recently been learning 6502 assembly on my own while I wait for my first 65c02 based computer kit to arrive. Most of the sample code I look at tends to be very small to make it easier to learn. There is one area which (to me) seams missing. What is a good way of performing stack operations in a ...

I ran across a surprising emulator today. Someone has created a 6502 emulator in JavaScript (NOT java).

http://www.6502asm.com/