weird scrolling on 386 \ VOGONS

weird scrolling on 386

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First post, by weldum

Posted on 2017-09-18, 12:32

weldum Offline

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Joined: 2016-02-16, 07:25
Location: Mendoza-Arg

Hello, I have an old Acer Anyware K386s that seems to work well, but in some games, like commander keen, horizontal scroll makes the screen "jumpy", very weird problem.

Also, it seems to be that the video card always compensate the image, becuase in 320x200 games it adds 40 pixels below to make it 320x240, and that is in the internal screen as well as in an external CRT or LCD monitor, it looks weird.

I think the video card is a Cirrus Logic 6420, and always locked to the screen's 640x480, also the colours are very saturated.

If anyone knows something helpful, it would be very good. Thanks.

P.D: One neat feature is that the 16 colors are represented as 16 grays on the internal LCD, I don't think that's very common on pre-color laptops and makes windows look very well.

DT: R7-5800X3D/R5-3600/R3-1200/P-G5400/FX-6100/i3-3225/P-8400/D-900/K6-2_550
LT: C-N2840/A64-TK57/N2600/N455/N270/C-ULV353/PM-1.7/P4-2.6/P133
TC: Esther-1000/Esther-400/Vortex86-366
Others: Drean C64c/Czerweny Spectrum 48k/Talent MSX DPC200/M512K/MP475

Reply 1 of 5, by keropi

Posted on 2017-09-18, 13:47

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try these patches for Keen 4/5/6 : Re: Keen 4-5-6 choppy scrolling on EGA card

🎵 🎧 ⏳ ⚡ PCMIDI MPU , OrpheusII , Action Rewind , Megacard and 🎶GoldLib soundcard website

Reply 2 of 5, by Rawit

Posted on 2017-09-18, 14:17

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It probably adds 40 pixels so when doubled you get a nice 640x480 resolution, probably the native resolution of the laptop. I hope the patches work, because it's also possible it forces 60Hz for the internal LCD, which can cause timing issues.

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Reply 3 of 5, by chris_vs

Posted on 2023-06-29, 12:48

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Hi!
I bought few years ago the same laptop Acer k386s but my original PSU is damaged - someone desolder few capacitors from PCB and I don't know their value. Maybe someone have service manual or schematics for this model (or for any of Anyware series if exist), or can do a pictures of PCB ? (this PSU has 4pin din plug).
Thanks
Chris

Reply 4 of 5, by weldum

Posted on 2023-06-29, 12:51

weldum Offline

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Joined: 2016-02-16, 07:25
Location: Mendoza-Arg

chris_vs wrote on 2023-06-29, 12:48:
Hi! I bought few years ago the same laptop Acer k386s but my original PSU is damaged - someone desolder few capacitors from PCB […]
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Hi!
I bought few years ago the same laptop Acer k386s but my original PSU is damaged - someone desolder few capacitors from PCB and I don't know their value. Maybe someone have service manual or schematics for this model (or for any of Anyware series if exist), or can do a pictures of PCB ? (this PSU has 4pin din plug).
Thanks
Chris

right now I'm on a Work trip but when I get home I can disassemble my psu and take some pictures of the components for you

Reply 5 of 5, by chris_vs

Posted on 2023-06-29, 18:45

chris_vs Offline

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Rank: Newbie
Posts: 3
Joined: 2023-06-29, 12:17

OK, thank You very much!!!, I need a photo of pcb where low voltage caps are - there are also two LED diodes.
Best Regards
Chris

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