Re: Playing ON vs WITH retro hardware (and hardware preservation)

Posted on 2022-06-07, 21:26

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For CRT longevity it is best to plug in an LCD when restarting and bios setting and whatnot. The power cycles are likely not good for them. When everything has been set up then its fine. I myself do not follow my own advice on this however. I am too lazy and do not have much room. I think the same. …

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Re: How to get old Windows XP games to run on Windows 11?

Posted on 2022-06-07, 21:04

by

by Jo22

in Windows

in Windows

https://www.vogons.org/viewtopic.php?p=1011873#p1011873 Your idea wasn't bad, though. It just seems that XP nolonger is maintained well in general. 😔 VMware may still work, not sure. However, it's future is uncertain, too. https://www.vogons.org/viewtopic.php?p=1073735#p1073735 A few years ago, I …

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Re: How to get old Windows XP games to run on Windows 11?

Posted on 2022-06-07, 20:30

by

by Jo22

in Windows

in Windows

Hi there! I don't know the answer, since I don't have a Win 11 machine in reach right now. However, I'm also looking forward to a possible solution/workaround! PS: I played the first version/episode on my Win98SE machine. Or rather, the demo of it. I downloaded it from PC Welt or Chip site in ~2000. …

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Re: Using the 320x240 256 color video mode

Posted on 2022-06-07, 19:14

by

by Jo22

in Milliways

in Milliways

Hi everyone. Here's something else I've found. https://retrocomputing.stackexchange.com/questions/11234/why-vga-framebuffer-was-limited-to-64kb-window Not sure if the last claim is true, but I've read that the i808x was very limited, it had no deciaded unit for address calculation yet. - That was …

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Re: XT is 8088 IBM clone, SRAM in ROM slots?

Posted on 2022-06-07, 15:57

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's a miracle that this setup even boots and isn't completely clobbering the data and address buses. It's definitely placebo and I wouldn't suggest running it like this for long. It's not acting as cache because not only does your 8088 system not have cache control circuitry (None of them do), …

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Re: XT is 8088 IBM clone, SRAM in ROM slots?

Posted on 2022-06-05, 17:40

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What is happing here? 🤔 I dunno for sure. Maybe the SRAM gets mapped into UMA, were the BIOS code used go. Edit: Some games can use UMBs. Commodore Keen IV,for example. But that's old news to you, I assume. 😅 Oh, and if the whole UMA was flooded with SRAM.. How would this affect VGA performance? …

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Re: Are we reaching a point where hardware before year 2007 is hard to find?

Posted on 2022-06-05, 14:06

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

AppleSauce wrote on 2022-06-05, 05:24: I remember 14 years or so ago you could find Pentium 2 slot 1s on the side of the road with sound blaster 16s in them. But not the real, classic SB16s? Those must have been cheap Vibras with their coloured headphone jacks, right? 🙂

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Re: Praim Thin Client with VIA C3 processor, problem about installing Windows

Posted on 2022-06-04, 23:00

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

^lolo799, I think your explanation/tutorial was splendid. Kudos. 🙂👍

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Re: Praim Thin Client with VIA C3 processor, problem about installing Windows

Posted on 2022-06-03, 18:20

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry, but I don't have a USB floppy drive and I am not interested to spend money to buy one in a project that started only cause a friend gave this thin client to me as he doesn't use anymore. No no, I'm the one who's sorry. 🙃 Certain things could be hassle free, if people just would be willing to …

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Re: Praim Thin Client with VIA C3 processor, problem about installing Windows

Posted on 2022-06-02, 20:44

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone. Don't despair! Just use an USB Floppy drive and an Windows 98SE boot diskette. 🙂 The diskette is a modified one, of course, not the original (use a copy). Add FORMAT and SYS to it. And FDISK, if it is not there. Then just boot from floppy, use FDISK to create a partition. If finished, …

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Re: 8-bit memory/RAM cards

Posted on 2022-06-02, 19:54

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

^That's mostly right, yes. Some modern XT compatibles may have a CMOS Setup, though. And an RTC, maybe. - I'm thinking of PC1512/1640 and of certain Atari/Commodore PCs. That also includes old PC emulators (hardware solutions). However, they aren't exactly clones of the PC/XT motherboard from IBM. …

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Re: INT 8 (IRQ 0) - what is correct frequency?

Posted on 2022-06-02, 18:09

by

by Jo22

in PC Emulation

in PC Emulation

It makes no sense to argue whether the frequency is intended to be 1'193'182 Hz or 1'193'184 Hz, as crystals are not that precise. But it might make sense to lock the OPL2/OPL3 rate to the 8254 rate, as they might be derived from the same crystal (depending on the sound card). So locking in the …

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Re: S-Video vs LCA (Luma/Chroma/Audio)

Posted on 2022-06-01, 20:19

by

by Jo22

in Marvin \ Video

in Marvin \ Video

Thank you very very much for your help! I really appreciate it! These 150 Ohms were an impedance value a friend of mine vaguely remembered, as well, btw (I asked him today). So there's something different, indeed. Maybe the PAL/NTSC models of the 1702 were different a bit, too. Or maybe some early …

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Re: Getting started with an IBM XT

Posted on 2022-06-01, 12:36

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Please let me know if I'm getting anything wrong, my only experience with the hardware this old is on Macs, which is quite different. Hi there! 😃 No no, I think that's fine. I'm a beginner, too! I rather grew up with an Sharp MZ-700 and ~286-586 era PCs. I've learnt quite a bit here at Vogons and …

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Re: XTIDE and Windows 95 issues?

Posted on 2022-05-31, 19:08

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Problem is SATA 300 TX4 doesn't have drivers in Win9x system. I use one to boot to DOS on a old P75 and it's very fast, around 73MB/S in speedsys. Win9x doesn't work though, blue screen when loading. Sounds like Win9x is trying to load a driver that is not 100% compatible and it crashes when it …

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S-Video vs LCA (Luma/Chroma/Audio)

Posted on 2022-05-31, 19:01

by

by Jo22

in Marvin \ Video

in Marvin \ Video

Hello everyone, I wonder what the electrical differences between today's S-Video and the old Chroma/Luma ports are. My Commodore 1702 had LCA connectors on the back and I used them for my Super Nintendo once. However, the output wasn't exactly correct. Maybe it was the cable, but it looked to me as …

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Re: What happens if DirecDraw is removed in a sudden update?

Posted on 2022-05-31, 14:19

by

by Jo22

in Milliways

in Milliways

The last living DirectDraw was from DirectX 7, afterwards DirectDraw was deprecated. That roughly was the last time the DDraw was supported as an independent component in the DirectX SDK. In fact, it's being emulated (rendered) since Windows Vista through Direct3D. Which is kind of ironic, because …

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Re: So just how does DMA on a 8088 based PC work?

Posted on 2022-05-30, 20:03

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I did (just about) get memory-to-memory copies working on my XT at one point. It can be done without losing DRAM contents by speeding up the refresh rate until all rows are recently refreshed, then turning off refresh and doing the memory-to-memory copy, then turning refresh back on (still at the …

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Re: XTIDE Hard Drive Recommendation

Posted on 2022-05-30, 13:21

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

^A pair of shift registers w/ switch for flow control ?

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Re: XTIDE and Windows 95 issues?

Posted on 2022-05-30, 13:08

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi there! Windows 9x and MS-DOS 7.x do retrieve the drive geometry in different ways. Windows uses its driver, MS-DOS uses BIOS. I vaguely remember writing about that in the past. https://www.vogons.org/viewtopic.php?p=826426#p826426 Also, which version of Windows 95 are you using? There used to be …

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