Re: Journey of a Unisys Aquanta HS/6, aka ALR Revolution 6x6
Posted on 2022-09-04, 00:57
Any news on retro vpn? @luckybob
Re: USB ISA cards?
Posted on 2022-08-30, 14:18
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-26, 06:53
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-22, 21:02
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-22, 12:19
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.
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-22, 12:16
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-22, 12:11
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-19, 18:40
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 😒
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-19, 18:26
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-19, 12:56
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-19, 12:52
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-19, 06:48
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 …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-19, 05:50
It is shown that it does not work in DOS. It has nothing to do wth power saving. It happens on pci and isa gameports on any PC. Pentium 1, AMD K6-2, Pentium 3. I will try some bios options for DOS, but to me it seems trimmer or something connected to trimmer issue. Trimmer range is from 7-13kOhm …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 23:27
Now I tried to adjust the trimmers on the joystick. I notice that the maximum value is always 130k Ohm. Then long time nothing and then it jumps to 13k Ohm. So if I adjust the maximum value on both axis to 13k Ohm, the problem disappear and DOS calibration utility can live with that, even it is not …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 23:07
The issue is that when I move the stick: - lowest position, lowest resistance = 3k Ohm - middle = 4k Ohm - top = 130k Ohm Clearly the autocalibration is not correct. The middle should be 50-60k Ohm
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 23:02
Could it be some issue in autocalibration on faster CPU? I tried to re-measure resistance when connected to PC. Without any software running, the middle position shows only 4k Ohm. Top position shows 130k Ohm. When running calibration software with timer loop, resistance is 2M Ohm. Is some component …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 22:23
Onedrive link - mp4 video….in the end it was faster to upload in 720p here: https://1drv.ms/v/s!Aq5X0D4OWWAThodvN4nTGEZKOO9reQ
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 21:55
Ok, I measured something interesting on oscilloscope. Uploading to Youtube. There is a Ramp signal and its length is getting smaller and smaller if you move the axis to the top. Then it stops.....video in 10 minutes.
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 14:04
So this is what the board looks like. Visually it is new. The green board on the right is only for turbo button switch. This joystick emulates throttle and rudder (analog axis) with POV hat (digital like buttons). That is probably why there are resistors at the top for R2X, R3X, R2Y, R3Y and not for …
Re: Some DOS joysticks keep disconnecting in Windows 98 on Pentium 1
Posted on 2022-08-18, 12:50
Yes, I have small oscilloscope - 2 channels - OLED display - on breadboard. XMEGA Minilab: https://www.seeedstudio.com/XMEGA-Xprotolab-p-1336.html?queryID=8e46e740e4d03d2fe50d955c33311fb9&objectID=1535&indexName=bazaar_retailer_products Manual is here: http://www.gabotronics.com/download/xscopes/ …
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