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Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116678 01/04/20 04:40 PM
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A while ago, Al was commenting in the shoutbox that the keyboard controllers for the AT drivers aren't regularly dumped with the BIOS ROMs. I received a box of loose ROMs and keyboard controllers, and I've got some motherboards in really bad condition that I can pull off keyboard controllers - meaning, they are available for decapping / dumping. Of the lot pictured, I was able to dump the 8049 part with some certainty, but the others are tripping security fuses while being read.
If there's interes, who should I be shipping these to?

[Linked Image from i.imgur.com]


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: rfka01] #116681 01/05/20 02:03 AM
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Lord Nightmare Offline
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I found a box of even more of these things that smitdogg sent me YEARS ago to forward to Dr Decap (yeah, that long ago, so around 10 years). I'm trying to figure out if I'd be better shipping them to sean or to caps0ff or TE or someone else... EDIT: or John McMaster, as al kossow mentioned below.

Last edited by Lord Nightmare; 01/05/20 06:57 AM.

"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
Re: PC/XT/AT (inside) WIP topic [Re: Lord Nightmare] #116682 01/05/20 03:55 AM
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Al Kossow Offline
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John has been working on 805x lately.

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116683 01/05/20 01:03 PM
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rfka01 Offline
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TeamE mentioned he wouldn't be able to dump/decap them. Going throgh the driver file, I've noted down these keyboard BIOSs:


Jetkey V3
Jetkey V5
Phoenix/Intel i8242
M5L8042-165P
AMI KEYBOARD BIOS PLUS
AMI 386sx KEYBOARD BIOS PLUS
AMI 386C BIOS KEYBOARD
AMI 386 Keyboard BIOS PLUS
AMI KEYBOARD-BIOS-VER-F / Intel P8942AHP
MEGAKEY
Intel/AMI MEGA-KB-H-WP
Lance LT38C41
BESTKEY
AMIKEY
AMIKEY-2
MEGATRENDS MEGA-KB-H-WP
Lance LT38C41
Award
NEC KB-BIOS VER7
Regional HT6542
BESTKEY
MR/Amikey
VIA VT82C42N

NEC D80C42C
NEC D8041AHC
VT82C42N
Winbond 83C42
HOLTEK HT6542B
M5L8042-165P


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116689 01/05/20 04:54 PM
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It's been verified through decapping that the JETkey chips aren't real 8042s (or any other sort of MCU), despite their familiar-looking 40-pin packages. It's possible that the same might be true for some of the other custom-labeled ones.

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116718 01/12/20 10:21 PM
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Edstrom Offline
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I just got hold of another Ericsson PC containing a bunch of early ISA cards and among them a Microsoft "universal pointing device adapter" from 1986
I guess it is an 8051 or similar, has/can it be(en) dumped? If it is possible to do it electrically without destroying the card I want to emulate it
[Linked Image from i.imgur.com] [Linked Image from i.imgur.com]

Last edited by Edstrom; 01/12/20 10:23 PM.
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116720 01/13/20 03:20 AM
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Those look like Oki markings, and Oki did second-source the 8051 series. On the other hand, this and other PCB photos imply a pinout nothing like the 8051's, and the address bus being hooked up directly, with so little in the way of supporting logic, strongly suggests that this is some sort of ASIC or a hybridized MCU with custom interface glue.

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116721 01/13/20 04:58 AM
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Lord Nightmare Offline
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Oooh, that's a Microsoft InPort Mouse card, the oldest (1.0) version. Later versions used a different MCU version and different board with less chips, see https://upload.wikimedia.org/wikipedia/commons/c/c5/ISA_mouse_adapter.JPG and the presumably even later http://legacycomputersnparts.com/catalog/images/MSInpRevP.jpg card.


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Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116722 01/13/20 12:48 PM
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Also this version has the one true Microsoft logo smile

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #116723 01/13/20 01:39 PM
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Edstrom Offline
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It is Rev E so presumably quite original, question is how to dump it, if possible.

I can hook up a logic analyzer, have a 16 channels which should work. The specification is quite simple it is more the relation between mouse signals and register values that is a bit fuzzy, maybe there is a patent somewhere that can be read to understand the chip. Unfortunality I have no bus mouse but I am looking for one among friends to be able to create a HLE bus mouse emulation at least.

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