DOS65_C02Pocket.zip

Thank you! Yes, it's worthwhile to build up a larger software/application collection for DOS/65. I use the RAM version of it, as I mix DOS/65 with the KIM and Apple-1 ROMs and DOS/65 should not always be in the memory map. But it is a very effective DOS. And it opens up the ...

May I ask where I can find those? They were not in the DOS/65 versions that I found, but would be very useful.

Kind regards,

Oscar.

Apparently written for the NMOS 6502. A casual scan of the source code reveals areas where use of the improved 65C02 instruction set would be beneficial.


Indeed - the "6x0x" PCB set that Dan wrote this for was designed to take any type of 6502, 6800 or 6809. Nice board, but it did not have many ...

Very nice! I just ported DOS/65 to my 6502 project as well. Or rather, my fake 6502-emulated-on-esp32 project.

There is one piece of DOS/65 software that I did not see listed in your screenshots, but it is worthwhile.

Dan Werner wrote a VT-100/ANSI full-screen editor for DOS/65 some years ago. I ...

Update... I've progressed to bring together KIM-1, Apple-1 and the DOS/65 operating system so they work together. It still leaves 32K for regular DOS/65 programs, and as the DOS/65 bootstrap only takes 75 bytes of ROM, almost all 64K space is free for KIM-1 and Apple-1 software. Which DOS/65 can ...

Nothing beats a good lockdown to make progress on the successor of the KIM Uno.

Here is the prototype "ESP65" in KIM-1 mode, cased with its optional fold-up display.
As my Christmas location does not offer a box of screws, the panels sit loose in the case. But never mind. Those are details ...

That would be fun - Al Williams already made a Cosmac Elf (1802) for it, the 6800 would complete the trilogy.

Kind regards,

Oscar.

I just updated my KIM Uno, a little ($10 in parts) pocket-sized KIM-1 'replica' of a few years ago. The code now also runs on the STM32 Blue Pill & esp32 microcontrollers. And on the TT-GO 2020 smartwatch, for no particular reason.

A picture is quickest to explain what the update is intended to do ...

Thank you!! Indeed an amazing piece of code. No sleep tonight I don't think...

Kind regards,

Oscar.

I think the 256 byte version for the C64 by Ruk/P-a Bäckström was already mentioned - here is the link:
http://csdb.dk/release/?id=104384

It's pretty amazing. Alas, the link to the source code is broken and I haven't been able to find it anywhere else either.
Does anyone have the source code ...

Are you using version C?

Yes, I went for small as my KIM Uno has only a tiny bit of free ROM space left... to the point where every byte matters. Which is as it should be.

Also, in the 1K RAM available inside the KIM, you can only write a couple dozen lines of VTL-02 code before running out of ...

Here is one I have - alas, without knowing very much about it...
http://obsolescence.wix.com/obsolescence#!es65/cy04

If anyone (maybe from Austria, where it comes from) knows more, I'd love to know!

Kind regards,

Oscar.

Hi,

Just for the record, I added VTL-02 to my KIM Uno (a pocket-sized fake KIM-1). Thanks for a true 6502 coding gem!
Here is a pointer to the project and the VTL-02 firmware update:

http://obsolescence.wix.com/obsolescence#!kim-uno-summary/c1uuh
https://hackaday.io/project/4802-kim-uno-a ...

Michael (A):

Thanks! The algorithm is more concise than the one I used to fix the 6502 emulator, I'll bring it across. Looks better...

Kind regards,

Oscar.

I never realised BCD was such a stumbling block. Half of the 6502 emulators I tested broke on the BCD code in fltpt65. Including very nice ones like Mayrat Fayzullin's M6502 and Piumarta's lib6502.

Regards,

Oscar.