Re: XT clone motherboard won't read 360k disks

Posted on 2023-09-14, 18:28

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi. 🙂 That's interesting, an average XT floppy controller can't do high speed transfers, as used by HD floppy drives with HD floppies formatted with HD capacity. I mean, there really were controllers that could, but they were higher end. Anyway, if it's a software problem, I recommend loading a …

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Re: VGA mode 13 no signal on real hardware

Posted on 2023-09-14, 09:36

by

by Jo22

in Marvin \ Video

in Marvin \ Video

One thing that I do have noticed though when working with VGA to HDMI converters is one cheap converter that was losing signal depending on what the viewed content is on the screen. Typically this was due to having a single color screen output, the converter misses seeing any active image content …

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Re: CGA/MDA/HGC test program

Posted on 2023-09-14, 06:50

by

by Jo22

in Marvin \ Software

in Marvin \ Software

I don't mean to "purr oil in the fire", but.. Back in the day, XT class PCs with on-board graphics not too seldomly had a COLOR/MONO switch on the back (next to DE9 and RCA jack). That way, they could either act as CGA compatible (home users who play games) and Hercules "MGA" compatible ( …

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Re: VGA mode 13 no signal on real hardware

Posted on 2023-09-14, 06:39

by

by Jo22

in Marvin \ Video

in Marvin \ Video

@jo22: I'm sure the VLB card differs in many ways, including the bios -- but like this? seems so weird. Like...reading 3DA should be pretty common for any 8, 16, or 32-bit VGA compatible adapter to support, right? Your guess is as good as mine, I'm not entirely sure, either. :shrug: Hm. Maybe it's …

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Re: VGA mode 13 no signal on real hardware

Posted on 2023-09-14, 04:04

by

by Jo22

in Marvin \ Video

in Marvin \ Video

Mode 13h without modifications is MCGA, rather than VGA (it also offers mode 11h).. All the intelligence of VGA is missing in that mode, it's more like a frame buffer.. Anyway, I don't mean to be nitpicking here. What I mean to express is something else: For troubleshooting, it's possible to try …

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Re: Will the Book 8088 be a future classic?

Posted on 2023-09-13, 08:59

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had a feeling that there was source for a logitech mouse driver out there in the wild at some point. That would be cool, because the Logitech one supports the Helix Multimedia Cloaking technology (running above 1 MB) . Sure, that's not really important on an XT, but might be of general interest …

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Re: Nozzle benchmark

Posted on 2023-09-13, 08:54

by

by Jo22

in Milliways

in Milliways

I think remember having seen either a DWG or DXF of that load up really slowly in Autocad release 10 about 30 years ago . [..] EDIT3: To answer your question, I like the idea, but the copyright/distribution status of the file would need to be clarified. Thank you very much, darry! :D I'll try to …

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MS Game Shop - Game programming in Quick Basic before QBasic ?

Posted on 2023-09-13, 08:47

by

by Jo22

in Milliways

in Milliways

Hi everyone, Just found out that there was a special release of Quick Basic 4.5 aimed at game development! :) - This was roughly a year before QBasic was bundled with MS-DOS 5 and up. It also comes with a few sample games based popular genres, like Breakout, Tetris or Missle Command etc. Or a music …

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Re: Will the Book 8088 be a future classic?

Posted on 2023-09-12, 09:09

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now, mouse driver for CH375 chip, anyone? Technically, it's possible for sure. There are vintage DOS mice drivers for real USB controllers, even. They worked with text-based applications like Norton Commander and its clones (Volker's Commander etc). There also were USB drivers on the Bret Johnson …

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Re: Will the Book 8088 be a future classic?

Posted on 2023-09-11, 23:35

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

GloriousCow wrote on 2023-09-11, 23:31: Let's bug reenigne to make a V20 version of 8088MPH and Area 5150. 😁 Yay! 😁 Your summary of the matter was excellent, also. Also kudos for the little mod on a veroboard. 😃👍

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Re: Will the Book 8088 be a future classic?

Posted on 2023-09-11, 23:27

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Poor V20, being replaced by a castrated 8086.. 😢

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640x200 4c on regular CGA board possible?

Posted on 2023-09-11, 23:15

by

by Jo22

in Marvin \ Video

in Marvin \ Video

Hi everyone, I wonder if it's possible to have 640x200 in 4 colours on a regular CGA card. Assuming that 32 KB were physically available (as piggy back) and that no aliasing happens (BC000-BFFFF range is an alias of B8000-BBFFF, the primary CGA page). And most importantly, how would the memory …

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Re: Garbled text when using CF-IDE adapter on 386 motherboard

Posted on 2023-09-11, 17:22

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Removing Pin 28 from the CF-IDE adapter did not fix the issue.. It's just an idea, but if it's not a hardware issue, then maybe it's a software issue? The ATA-2 specification (Fast ATA, Enhanced IDE) changed a lot of things back then. It could be that the HDD routines in the BIOS have issues with …

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Re: Garbled text when using CF-IDE adapter on 386 motherboard

Posted on 2023-09-11, 16:56

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In the end i configured the card manually in the bios and ran a low level format from the bios. Then Fdisk/format the card from dos 6.22 . Be careful with low-level format feature in BIOS. It's dangerous under most circumstances. It's not like a soft format, at all. The feature is there for 16-Bit …

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Re: Older Sierra games crashing IBM PS/2 Model 70

Posted on 2023-09-11, 04:35

by

by Jo22

in Marvin \ Software

in Marvin \ Software

This one, maybe? http://agi.sierrahelp.com/CopyProtection/SUP.html The earliest releases were from 1988-1990, so it's period correct. When I used SUP with KQ3 about 20 years ago, I vaguely remember, it had asked me for my original disk, though (which I had owned, ofc).

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Re: Will program written in Microsoft Visual Basic 1.0 work in Real-Mode on Windows 3.0?

Posted on 2023-09-10, 23:29

by

by Jo22

in Milliways

in Milliways

Well, it seems that it really doesn't worth an effort and the only practical option is a Turbo Pascal for Windows. Hm. Maybe I can find the old disk set of Realizer.. My dad has it stored somewhere, I vaguely remember. If I've found it, I'll try if it works in Windows 3.0 Real Mode and write back. …

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Re: Will program written in Microsoft Visual Basic 1.0 work in Real-Mode on Windows 3.0?

Posted on 2023-09-10, 17:50

by

by Jo22

in Milliways

in Milliways

I was asking because Windows 3.0 is the latest available version of Windows that somehow works on HP 200LX. Don't know why I pay so much attention to this cute little nonsense ... Maybe because it is cute. Ah, I see. Makes sense. Maybe CA Realizer does work here, it was a Visual Basic alternative. …

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Re: Will the Book 8088 be a future classic?

Posted on 2023-09-10, 17:39

by

by Jo22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

betamax80 wrote on 2023-09-10, 15:10: If anyone spots the model with serial and parallel on any site other than TaoBao do let me know 😀 Let's just hope the serial port is an 16550A and not an XT era i8250; certain things are better left in the past.. 🙁

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Re: TopTek Golden Sound Card Pro Deluxe ISA

Posted on 2023-09-10, 06:50

by

by Jo22

in Marvin \ Sound

in Marvin \ Sound

The latter was so popular, I believe, that Creative sold an 1.5 firmware upgrade to 1.0 owners for a short moment in time (= new microcontroller or re-flashing of old one). Definitely not re-flashing. Creative always used mask-programmed 8051 chips on their cards. The chip labeled "DSP-1321" on the …

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Re: Will program written in Microsoft Visual Basic 1.0 work in Real-Mode on Windows 3.0?

Posted on 2023-09-10, 03:15

by

by Jo22

in Milliways

in Milliways

Hi there. ^^ I'm afraid VB 1 applications need Protected-Mode (80286+). Maybe an old version of CA-Realizer will do, however, not sure. On the bright side, though, Turbo Pascal for Windows (TPW) applications are Windows 3.o RM compatible (8086+). The Windows compiler in Borland Pascal 7 (Turbo …

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