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I totally forgot, there was a daughterboard of some kind piggybacked on the main board @U43 but I forgot to take a picture of it, I'll do that later.

Hi Sharkpuncher, thanks for the pictures ... if you can, read the ICs at U9 and U34 ... and also the keyboard MCU.

As for the hard disk controller ... what is known about the chipset?

The only thing that seems somewhat close is the wdxt_gen.cpp ISA harddisk controller ...

I've issued a pull request for the Omni 4 logic analyzer. We already had the ROMs for the Omni 2, this 4 is based on the Kaypro 4/84 instead of the II.



The story of archiving the Omni 4's disk and ROMs (and the files) can be found here:

https://hackaday.io/project/20151-floppy-fun-backing-up-a-unique-kay-pro-disk

The emulated Omni 4 boots the disk image, but the logic analyzer software obviously complains about the missing i/o board.

Here's the promised dump of my Kaypro 10's keyboard controller. It's a Mitsubishi 8049 that I've dumped using the i8749 settings. It's on the FTP as well, as usual.

Kaypro 10 keyboard MCU dump

Cool, a small one. I like emulating keyboards, so I'll take a look at it some time. No guarantee we can support it yet, because we don't emulate MCS-51 onboard serial and it could very well use that. Is it just the MCU in the keyboard, or does it have a mapping PROM as well? What's the chip's clock source? IIRC the Kaypro uses a 300 Baud ASCII keyboard.

Vas, there's a picture of the 8049 in the keyboard on page 1 of this thread - next to it sits a 6 MHz crystal. Also on page 1 is a photo of sharkpuncher's mainboard which shows this side of things.

Here's the technical manual

https://www.mirrorservice.org/sites...o/1484-D_KayproTechnicalManual_Dec84.pdf

Keyboard ports are on page 142

Here's a piece about the Kaypro keyboard ... 300 Baud seems to be correct.

http://www.classic-computers.org.nz/blog/2010-02-18-kaypro-m100-keyboard.htm

MCS-48 doesn't have builtin serial, does it? (except via bitbanging in software, which is why the notetaker used an hd6402 uart outside the 8748 chip...)

LN

Yeah, intel MCS48 doesn't have onboard serial. That's good news. Also, fairly small program, so should be tight code and easy to work out. BTW what's the small chip? I can't read its label. The big chip is a demux presumably used for scanning rows as in the Zorba keyboard.

Right, the chips are: SN74154N, the crystal, the 8049, a SN75451BP, a beeper and a DM7406N