Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2023-01-04, 19:09

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@MMaximus : thanks, your physical Model80 machine has the exact same BIOS version as 86box VM Model80. So, I think DMQS gets disabled most likely due to what @SSTV2 noticed about the overlapping ROM ranges. I hope with help of 86box developers all those findings be put together and soon we have …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-29, 21:45

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://www.ardent-tool.com/video/XGA2.html XGA-2 all of them have slightly different versions but as far as IBM is concerned, is equivalent in specs, officially. There is no such as 45MHz ramdac, this is rated around 75MHz for all of these. thanks, it's all getting together, because in IBM 's "XGA …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-29, 20:49

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't have access to my machine at the moment but I bought my XGA adapter from WBST on amibay a few years ago. Here is the archived thread - you might be able to get more info about the adapter from the picture same as @SSTV2, i.e. "RAMDAC with Heatsink". according to @SSTV2 those are the 1st …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-29, 19:28

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

it's the first revision with a heatsinked RAMDAC I don't know which one is the 1st revision and so here I count on your good knowledge about PS/2, but then it means even the 1st XGA-2 is 90MHz RAMDAC, i.e. "Index 53H=0x53", I guess that means there are no "Index 53H=0x50" (45MHz RAMDAC) XGA-2 cards …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-29, 14:15

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@MMaximus and @SSTV2 : just out curiosity how the DAC chip looks on your cards from the above 3 options - maybe we can at least in the end of 2022, almost 2023 tell, how at least some of 90MHz DACs are looking, as you both have cards with 90MHz DAC for sure.

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-29, 14:02

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

actually, in my previous post I am talking total nonsense in my reply to @MMaximus, because still there is no connection in my brain to our latest finding about Index 53H and xga2 info tool DMQS output: https://www.vogons.org/viewtopic.php?p=1127947#p1127947 So, based on @MMaximus logs : https:// …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-28, 16:10

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@MMaximus : currently, most helpful would be "xga2 -s >> xga_full.log" from your Model 80 to investigate the DMQS support issue. Other tests would be mostly redundant, but it depends on what XGA-2 card revision you have - if you look here: https://github.com/86Box/86Box/issues/2983#issuecomment- …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-28, 04:35

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

good catch and observation - probably another bug, I did not even noticed that, because instead "PS/2 SCSI Adapter" as in your case, I have "ESDI Fixed Disk" in my config and thus no conflict is shown explicitly (to draw my attention on it) like in your case, where C6000 - C7FFF is obviously subset …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-27, 21:40

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@ MMaximus : please, when have time, do collect: Copy code to clipboard 1 xga2 -s >> xga_full.log because you have Model 80 - same as what 86box emulates and yet in your system DMQS works, while it fails in 86box. thanks.

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-27, 21:31

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

XGA2 Index 52H value: 21FA; XGA2 Index 53H value: 2153. Great! Now thanks to your tests, the undocumented Index 53H became really obvious: * on XGA-1 card its value is 0x30 and DMQS reports: 3 - XGA implementation function level identifier 0 - XGA implementation resolution level identifier * on XGA …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-27, 19:47

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@SSTV2 : wait, on 2nd thought, I think the result is so weird in the machine with XGA-2 card, because there is bug in my XGARD52H/XGARD53H - in machine like yours with 2 x XGA cards, one XGA-1 (on-board) and one XGA-2 as add-on card, my tools always pickup the XGA-1 card and in that case the on- …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-27, 19:08

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@SSTV2 : Wow, more surprises in terms of values. It's good we're making emulators, the only real way to preserve those old machines and technologies forever, but it's like no one is actually validating those emulators against real machines - not that I am blaming anyone, I myself was not able to buy …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-27, 11:11

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, here are the next 4 test tool and they are the last ones I have for the time being, i.e. after we collect the output from them I will not bother you with more tests (at least for some time until I am analyzing the results and trying to make more sense what is going on): https://www.mediafire.com …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-27, 10:47

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

let's hope it will output "FAIL" in "DMQS not supported" machines and "GOOD" in "DMQS supported" machine The result was exactly that - FAIL on the XGA and PASS on the XGA-2 graphics adapter. excellent, so at least one thing confirmed that I am correct about it. So, it seems IBM's XGAAIDOS.sys …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-26, 20:57

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@MMaximus and @SSTV2 both of you - many thanks! it's very interesting, to be honest I did not expect that, because @MMaximus model 80 reports "DMQS supported" - that fails in 86box even when VM is emulating Model 80. So, that kind of confirms my suspicious that maybe there are BIOS revisions without …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-26, 15:45

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

PS/2 model with 32-bit MCA slots compatible with such a card. no one corrected me, but after some reading it seems at least "XGA-2" cards even they are 32-bit MCA, work in 16-bit MCA slots. however, their drivers require at least i386 cpu and even more unfortunate cheap and available models like ps …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-25, 16:04

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@MMaximus and just to add if you take your PS2 out of storage first you can do is download this: https://web.archive.org/web/20140911121135if_/http://www.members.aon.at/mcabase/pub/files/xga2util.zip and run: xga2 -v >> xga.log and upload the "xga.log" here and we proceed from there. Right now, I am …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-25, 15:28

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a model 80 in storage with an XGA2 adapter, I might be able to help out if you don't require anything too complicated from me :) nope, it's very easy, it will be just boot to dos, copy and run few exe files that I provided to you and tell the output - see the attached screenshot for example …

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Re: Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-25, 11:37

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I know @LuigiThirty in Twitter has one working (she was developing a port of Doom for XGA cards), maybe she could help with this. thanks, I don't want to bother directly people, i.e. approach them on Twitter, etc. So, if anyone is interested, can contact me here or join the "party" here: https:// …

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Help anyone with IBM PS2 and XGA card on MCA bus

Posted on 2022-12-23, 10:47

by

by mattw

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I am fighting few problems with the very new XGA emulation in 86box: 1) https://github.com/86Box/86Box/issues/2983 2) https://github.com/86Box/86Box/issues/2968#issuecomment-1353478837 and 2) even the developer of the emulation has no any idea at the moment. So, I want to investigate further …

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