6502.org

6502 instructions only.

Please double-check that the reset switch is in fact the correct pin - the third one (P96). The diagram was wrong until this Nov 29. It's correct now.

OK, 6502 only.
Yes, the button is connected to the third pin (P96) and 3,3V. It seems to be working.

And yet again, I got the SD picture wrong! Clock is on P90! Sorry, guys. Diagram and web site fixed yet again...

Hi enso,
The SBCOS source file still contains 2 instances of 65C02 codes.
The SBCOS bin file didn't work for eg.
5000: 55 (not written)
and
! ? (Help at mini-assemmbler)

The codes are sta (addrptr) and lda (addrptr) in the SBCOS src.
should be ldy #$00, sta (addrptr),y and lda (addrptr),y respectively.

I've just gotten round to installing a 6502 cross assembler on my Mac, and modified enso's modified SBC2OS sources. With two trivial changes for the 65c02 instructions you've identified, the modify and assembler help operations seem to work.

BTW: The assembler I chose is "ATAsm" (found under tools/asm here on 6502.org); I downloaded the "trunk" version from sourceforge and compiled it without any problems. There were only one or two minor things that had to be changed in the SBC2OS source to get the assembler to accept the code (character constant: #"C" -> 'C, and an issue with a required space between .BYTE and a string constant).

Note that this assembler defaults to an Atari-specific output format, so the "-r" command line switch is necessary to get raw binary output.

The CHOCHI boards are really neat - I keep thinking that they might be pressed into service as co-processors/accelerators for the Apple ][

Has anyone talked to enso recently? He hasn't posted here in eight months, and hasn't even visited in almost seven. I hope that he's doing okay ... maybe he lost interest, or he just got ridiculously busy ?!?

Mike

I've been wondering myself... He was a great asset.

Ditto for Arlet. And there are others we haven't heard from lately, such as ttlworks. I'm not a person given to worrying, but I echo Mike's sentiment -- I hope they're alright.
Ridiculously busy would be good!

-- Jeff

Well, I emailed Arlet about 6 months ago. He was doing well, but busy with work...
ttlworks I PM'd awhile ago (2013) and he responded... Maybe Dajgoro knows?
Although not mentioned, Bruce is lurking. He answered my PM very recently. I'm trying to get him to revise his version of Bob Bishop's mandelbrot machine language routine (made for the Apple IIgs) for my project.
Not sure about enso though...

I see enso's CHOCHI board just got featured on hackaday, so he'll be getting some email enquiries, I would think.
http://hackaday.com/2014/08/16/an-fpga- ... -computer/

I recently found the CHOCHI board enso sent me. I hope all is going well with him, and hope to see him back on this forum soon. I sent him a PM some months back but received no reply in return.

I'm getting a bit nervous with these members that are MIA. Nightmare Tony's untimely death is still fresh in my mind.