Awesome!

I flashed a Pico and it is really a SYM-1 via TTY.
A Pico W also works fine.
I do have to test the SYM 1541 DOS

Will add this to my website today!

Great to see the complete 1541 DOS manual in the archive.
I hope that other users of PicoSYM will benefit from the other SYM-1 manuals and ...

Not the best name tbh.

Neo6502 is the name of a succesfull Olimex product.

https://neo6502.com/

The issue with that is that the Kowalski simulator doesn't know about the hardware that the KIM-1 has, like the keypad or display. Hans Otten has written a simulator specifically for the KIM-1. You can use the assembler in the Kowalski simulator to assemble your code, save it to a file, and then ...

First things to do on a KIM-1 (see the sticker attached from my original KIM-1)

Fill in the vectors, so Break /Stop/NMI works works.

Clear decimal 00F1 to 00 at least

Then press Go.

It was removed and bridged. See the bottom of the PCB. The owner must have supplied sufficient + 5V power on the backplane.

KIM-5 Resident Assembler/Editor available!

MOS Technology, part of Commodore in 1977, sold the KIM-1 SBC. And added hardware and software as KIM System Products.

Not only hardware, a Motherboard (KIM-4), RAM memory expansions (KIM2, -3, -3B) and a prototype board (KIM-6) but also software, like ...

wow! 6502.org at his best!

http://retro.hansotten.nl/6502-sbc/kim- ... re/#mchess

where I document Microchess for the KIM-1, original manual and articles..

Has source (in TASM format!) that delivers an exact binary as from my dumped original audio tape.

I believe I found another problem:

On line #4335, you are missing ">>8"

This is a good reason for .byte to issue an error or at least a warning for an out of allowable range value.

Already fixed last friday in the archives. This is the one error I found in the KIM-1/TIM Program Exchange sources ...

That would be nice Bill.

Load/save programs and data is what is missing. No file I/O in this version makes it a bit unfriendly. There are two ways to load/save a Focal program: dump the whole memory image including the program space (that is what was done in the old days) or do a text file download ...

. I had seen your Papertape (PTP) version of FOCAL, but didn't realize that further down your FOCAL page you have the source(s) you recreated as well: http://retro.hansotten.nl/6502-sbc/focal-65-v3d/#sources


That papertape file is not mine and not from my pages. I suppose it is a patched ...

Mike, Sam,

Thank you for the nice words! It has been fun recreating source for this program.

Porting to another 6502 system requires:
character input (no echo)
character output
setting of BRK/IRQ vector (BRK used a lot in the interpreter)
See the KIM=-1 or TIM I/O package in the Denver 6502 Group ...

It was an easy job to reconstruct the source of the Aresco Focal version from the TIM source.

I took the binary of the tape dump from 1978, the interpreter part.
And compared it with the binary output of the assembler.
The TIM source was the beginning of the Aresco source. I had also the ...

Out of curiosity, has anyone tried the TIM version on Hans' TIM (i.e. JOLT computer) simulator? Also, I'm not sure but I think the original assembler used might have been Aresco's version of the MOS resident assembler, https://www.pagetable.com/?p=1522
A quick find! That page is up since yesterday!

SECONDRUN.jpg I took a different route in my work to reconstruct Focal-65 from source.

My goals are to preserve the original work as much as possible, to honor the work of the original author(s).
This means for me staying as close as possible to the original!

Only when that is looking good, I ...