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I would make the include files be modules that I would use in other projects. Otherwise there's not much sense in breaking it up just to break it up.

The (ZP,X) addressing mode is great for when you have a ZP data stack, using X as the stack pointer, and various cells on this stack may be addresses. This addressing mode is used all the time in Forth and I suspect other HLLs too. We had a discussion on this on the 6502.org forum, at http://forum.6...

Noises get in when a signal is referenced against something that not really ground. People thing that connecting all the grounds everywhere to each other should fix it, and that ground is ground is ground; but that's not true. The term "ground loop" is often misapplied, and the phenomenon is widely ...

It's only seven bytes; so you could even straightline it (instead of called as a subroutine) and add a NOP or two, and if necessary, a trailing BCC to the next instruction (meaning a 3-cycle NOP, assuming it doesn't cross a page boundary), in quite a few places to get the needed resolution without t...

Check out also this slick one from Bruce Clark. The delay is 9*(256*A+Y)+8 cycles (plus 12 more for JSR & RTS if you make it a subroutine). This assumes that the BCS does not cross a page boundary. loop: CPY #1 DEY SBC #0 BCS loop He writes: "A and Y are the high and low bytes (respectively) of a 16...

Good points so far. I have a lot at http://wilsonminesco.com/6502primer/PgmTips.html .

nocash wrote: ↑

Sat Sep 26, 2020 7:41 pm

But did 32pin SRAMs even exist in 1994?

My 1992 Hyundai data book has up to 128Kx8 (1Mb) SRAMs, in 32-pin DIPs and SOPs. I got a 1 megabyte SRAM STD-bus board at work in 1990 or so which had eight 128KB SRAMs on it. ("STD" stands for "simple to design," not "standard.")

Any progress?

Jacobson, I had not seen the post you linked to. I'm not a moderator or administrator on this forum; but I am one on several others, and I've seen the pattern over and over. Although there's nothing specific wrong with the one post, if it looks suspicious like this and I use the tools available to o...

Jacobson wrote: ↑

Tue Sep 01, 2020 12:48 am

Well said, thanks for sharing, it is very helpful to my understanding of programming.

This is a typical first post for a spammer who thinks there's some kind of probation period to get past, and shows no legitimate interest or knowledge in the subject.

Move from A to B is technically correct but not something you would say "Move from A to B" is very normal in English. "Maths" however is not a word we use in the U.S.. (I think England uses it though.) In the U.S., it's always "math," like "dirt" or "air," never plural. 6502 is based on 6809 which ...

User-level bans for spammers are meaningless, only IP blocks and deleting users means anything. I should have been more complete in my post right before that. phpBB forum mods can ban a user by name and IP address, and, if they can get an email address from a site like stopforumspam.com, ban the em...

Dwedit wrote: ↑

Mon Jul 27, 2020 12:23 am

Mods can't ban, only admins can do that.

Mods can ban, but not delete the user.

Now I've just gotten spam by private message, from Claytonpeect!! It's past time to do something drastic . I'm also a moderator on the 6502 CPU Family group where we have a question for applicants, about why they want in. This is to sort out those with a legitimate interest from those who just want ...

New (ab)users' posts should not show until they've had a few valid ones approved by moderators. Just one post may not be enough, as I'm a moderator or administrator on several other forums and I've seen newcomers come with bad intentions who don't know our subject matter so they copy and paste someo...