Previous Thread
Next Thread
Print Thread
Page 259 of 261 1 2 257 258 259 260 261
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115200 04/30/19 02:16 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline
Senior Member
Offline
Senior Member
Joined: Jan 2012
Posts: 999
A while ago I posted two ROM versions for a Sanyo MBC-17plus 286 compatible. They wouldn't work in the regular 286 driver, and there was still the suspicion that they might be bad dumps.
I got one of those machines myself in the meantime and dumped the ROMs, but those don't slot into the AT driver either. As friends are trying to repair a MBC-17plus it would be great to have it running in MAME for comparisons.
Could some kind soul please take a stab at getting the confirmed good ROMs (on the FTP) running?


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: rfka01] #115205 05/01/19 02:11 AM
Joined: Dec 2015
Posts: 104
A
AJR Online Content
Senior Member
Online Content
Senior Member
A
Joined: Dec 2015
Posts: 104
The MBC-17plus reportedly uses the ZyMOS POACH/AT chipset. Documentation for this seems hard to find, or I might just be looking in the wrong places.

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115206 05/01/19 03:26 AM
Joined: Mar 2001
Posts: 16,273
R
R. Belmont Online Content
Very Senior Member
Online Content
Very Senior Member
R
Joined: Mar 2001
Posts: 16,273
I discovered a lot of the -bios options on at486 come to life (and give you niceties like working > 504MB IDE support and IDE geometry auto-detect) if you give them the Dallas version of the MC146818 with double the CMOS RAM, but it's kind of a pain to make the AT motherboard device do that in a switchable way.

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115208 05/01/19 08:18 AM
Joined: Jan 2012
Posts: 999
rfka01 Offline
Senior Member
Offline
Senior Member
Joined: Jan 2012
Posts: 999
Nice discovery, RB! I have several more 286, 386 and 486 and quite a few Pentium firmware versions to add.

@AJR thanks for checking ... I'll ask what's in the Sanyo documentation.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115211 05/01/19 12:22 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline
Senior Member
Offline
Senior Member
Joined: Jan 2012
Posts: 999


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115219 05/01/19 09:51 PM
Joined: Dec 2015
Posts: 104
A
AJR Online Content
Senior Member
Online Content
Senior Member
A
Joined: Dec 2015
Posts: 104
From those links, it seems that the 82230/82231 described in my Intel databook were second sources of the ZyMOS POACH1/2, so that chipset can be considered documented. (POACH3, according to Circuit Cellar, is just a bus buffer.)

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115239 05/06/19 09:16 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline
Senior Member
Offline
Senior Member
Joined: Jan 2012
Posts: 999
Some of the Commodore AT machines require Ctrl-Alt-Esc to access the BIOS setup. How do I pass these keystrokes to MAME? Even in full keyboard mode Windows is task switching me away from MAME.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115240 05/06/19 11:33 PM
Joined: Mar 2001
Posts: 16,273
R
R. Belmont Online Content
Very Senior Member
Online Content
Very Senior Member
R
Joined: Mar 2001
Posts: 16,273
Remap Ctrl to Shift maybe?

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115265 05/11/19 04:13 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline
Senior Member
Offline
Senior Member
Joined: Jan 2012
Posts: 999
The Commodore PC-I (compc1) seems to have acquired the correct BIOS ROM V1.1 in MAME 0.173 (I had dumped them in 2012 and just re-compared with my unit), but it looks like it didn't run - I tried old MAME and MESS versions up to 0.209.

http://www.zimmers.net/anonftp/pub/cbm-pc/ALLFILES.html has that V1.1 ROM and a V1.2 ROM. Moving the PC-I to compc.cpp got the V1.2 ROM going, the V1.1 just freezes MAME.

Included in the archive on the FTP is a PDF with a technical manual of the PC-I.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #115272 05/12/19 12:26 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline
Senior Member
Offline
Senior Member
Joined: Jan 2012
Posts: 999
I added the ROM for a Nixdorf 8810 M30, a 286 desktop machine.This one doesn't like our NEAT chipset. A user on the German forum commented that the NEAT chipset hat two revision bits that could be queried by the BIOS.

[Linked Image]


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Page 259 of 261 1 2 257 258 259 260 261

Who's Online Now
2 registered members (AJR, Dorando), 93 guests, and 3 spiders.
Key: Admin, Global Mod, Mod
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Forum Statistics
Forums9
Topics8,673
Posts113,788
Members4,852
Most Online418
Aug 14th, 2019
Powered by UBB.threads™ PHP Forum Software 7.7.3