Re: Journey of a Unisys Aquanta HS/6, aka ALR Revolution 6x6

Posted on 2022-12-30, 08:57

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

H3nrik V! wrote on 2022-12-30, 08:49: https://www.cpu-world.com/forum/viewtopic.php … =asc&highlight= Anyone in need of spares? I'm not on that forum, you selling it?

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Re: Limit DOS RAM memory (XMSDSK / HimemX / JemmEx), DOS RAM size limit

Posted on 2022-12-04, 12:15

by

by cyberluke

in DOS

in DOS

I had to use LIMITMEM.SYS or try different HIMEMX versions (there are some different behavior across versions). Also needed to enable Memory Loop Hole in BIOS in some situations (together with LIMITMEM.SYS).

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Re: Need help from a programmer.... porting Open Dune/Dune Legacy/Dune Dynasty to MS-DOS thread

Posted on 2022-11-12, 18:39

by

by cyberluke

in Marvin \ Software

in Marvin \ Software

Yes, I understand, but lets forget MIDI and what about Sound Blaster + Adlib OPL3? I have 10 DOS machines here ranging from 40Mhz to 1GHz. I would prefer 550 Mhz AMD K6-62+ because of ISA slot. I compared Roland SC-MKII (including its MT-32 mode) with Sound Blaster AWE 32 as well as AZTech Yamaha …

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Re: Need help from a programmer.... porting Open Dune/Dune Legacy/Dune Dynasty to MS-DOS thread

Posted on 2022-11-11, 19:32

by

by cyberluke

in Marvin \ Software

in Marvin \ Software

Any updates?

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-10-27, 11:36

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, but this has another issue: this CT2950 card has midi note hanging bug and does not have OPL3. Haha. So now I have new problem: make Roland SC-55 working or get OPL3 card at least (like AZTech). I briefly tried CT2950 with ESS1869F in one PC, but there was some conflict in both DOS and WIN. …

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Re: RLoader: a native 16-bit MS-DOS programs and games launcher with search

Posted on 2022-10-26, 20:50

by

by cyberluke

in Release Announcements

in Release Announcements

Very good project! Now I need to write some directory scanner and generate metadata and download screenshots via script on second computerr.

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-10-26, 20:44

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I made some progress: CT2950 (should be SB 16 Pro PnP) - mine does not contain OPL3 chip, but it really solves the problem! The old 486 or pre-486 joystick works on Pentium 200Mhz MMX in both DOS and Windows CT2940 (regular SB 16 PnP) - works in DOS, Windows reports Joystick OK, but opening …

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Re: Journey of a Unisys Aquanta HS/6, aka ALR Revolution 6x6

Posted on 2022-09-17, 21:42

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, can you recommend DDR RAM for Aquanta HS/6? Would all of these work? I assume that any ECC registered PC133R 256MB should work: https://www.ebay.com/itm/203461754572 https://www.ebay.com/itm/374109390529 https://www.ebay.com/itm/202849972942 https://www.ebay.com/itm/224476335855 https://www.ebay …

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Re: Journey of a Unisys Aquanta HS/6, aka ALR Revolution 6x6

Posted on 2022-09-04, 00:57

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any news on retro vpn? @luckybob

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Re: USB ISA cards?

Posted on 2022-08-30, 14:18

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For tech support, you can mail this guy directly: mj@wch.cn (or tech@wch.cn). I bought random card USB ISA from AliExpress and it just contains the WCH (CH375) chip, so then you contact the manufacturer of the chip. That's what I did. It does not matter, who made the PCB (Lotek or Ali). By default …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-26, 06:53

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have acquired Sound Blaster 16 PnP (CT2940) - waiting for delivery - this one should be special in terms of gameport speed as you said. I have also acquired another Gameport ISA card for Pentium by InterAct - instead of knob or switch they provide some kind of calibration software (including speed …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-22, 21:02

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, what you describe is correct. Remember I have the special ISA gameport card with speed switch and that probably changes the capacitors and that did solve the issue previously, but it was half way solution (only for DOS, not for Windows). Yes, adjusting VR1 and VR2 makes your range just smaller …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-22, 12:19

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So when I adjusted VR1 and VR2, I am basically not fully charging the capacitor and I won’t reach the threshold, where the issue happens. You get half range, but it works.

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-22, 12:16

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The last oscilloscope position when bug occurs look like this yellow line. The spike is cut. Looking at the square wave signals, especially Trigger signal, I would think that at this fast rate, joystick might not be fast enough to read the Trigger change and then the latching with open collector …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-22, 12:11

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello, 'In ordinary potentiometer based joy this can only happen in the bottom/right positions (longest 'timing interval').' - Here on this joystick it happens in the top/left positions - on oscilloscope it can be seen as the shortest timing interval. Then the number of samples fall down and …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-19, 18:40

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It is normal capacitor 47uF - I removed it and measured again. It is ok. I really don't know why the range is so bad 😒

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-19, 18:26

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am not able to make any progress. I have Proskit Smart SMD Test Tweezer, which can detect component type and then measure its value. There is one blue capacitor. There is written 'COM' on it. The rest I cannot read. This tweezer will read 130 Ohm on this capacitor. Other capacitors do have nF …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-19, 12:56

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is the potentiometer, based on variable resistance, correct? The trimmer adjusts the range of it, correct? Therefore I had to decrease its range to minimum to make it work. So I should perhaps measure the middle pin to the ground and check the resistance range. I start to believe this makes the …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-19, 12:52

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now I plugged back in ESS soundcard (ISA) and start Windows 98 SE. I made it work using the trimmers. So I don't think this has anything to do with speed compensation. Also you mention that it does not make sense for you it happens at top edge or left edge (around 0,0 coords). So now I have adjusted …

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Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1

Posted on 2022-08-19, 06:48

by

by cyberluke

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It is new joystick, I can return it or change for another one if it is issue with variable capacitors. Yes I was thinking about adding resistor from the bottom on trimmer. I have gravis gamepad, will try that, thanks. So far the special isa gameport fix it with switch to Fast,but then it stops …

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