VOGONS


First post, by gemerttower

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Hi all!
Busy bringing a Vendex Headstart III back to life. All goes well so far but the videosignal: I'm only getting the screen in monochrome. The message when powering on the system:
Monochrome will be assumed unless there is a co-resident MGA installed.

I have totally no idea what that message is supposed to be. Btw, it's a CL-GD520A ISA card. Using a different card then the output is "full" color; in this case an Oaktech VGA, also ISA, using the same slot.
Card says also 9990-CVGA VER1.1 if that's of any help. Btw, I'm a bit scared of that C in CVGA 😉

Someone who can tell me what this message means, thanks!

Reply 1 of 6, by Pierre32

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Not sure if it's the same issue, but I had this symptom in my 386 with a Tseng card. It was full colour on an LCD, but detected my CRT as monochrome. I used the Trident utility 'smonitor' to fix it (it needs to run in autoexec, and no it doesn't matter that it's not a Trident video card). It's discussed here: Tseng labs ET4000AX - no color = problem

There is an alternative called 'coloron' which I haven't tried: Re: Investigating old ISA VGA cards

Reply 2 of 6, by gemerttower

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Thanks for your help. Starting MSD the splash screen is in color, then switches back to monochrome. Tried out another monitor and it's directly in color and stays in color. Weird, this is something I've never experienced before in my 30+ years of being busy in computers and so a new thing was learned today 😀

Thanks again for the help!

Pierre32 wrote on 2020-11-18, 13:16:

Not sure if it's the same issue, but I had this symptom in my 386 with a Tseng card. It was full colour on an LCD, but detected my CRT as monochrome. I used the Trident utility 'smonitor' to fix it (it needs to run in autoexec, and no it doesn't matter that it's not a Trident video card). It's discussed here: Tseng labs ET4000AX - no color = problem

There is an alternative called 'coloron' which I haven't tried: Re: Investigating old ISA VGA cards

Reply 4 of 6, by gemerttower

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Hmm, that's another very interesting idea in this case, will check that tomorrow when I'm at work again! I use this Dell monitor for various computers I'm fixing but this is the first PC where it's not giving any color from start.
The Headstart III is back in storage, but worth a test with the current VGA cable if that is the culprit.

kixs wrote on 2020-11-18, 14:13:

Have you checked the VGA cable?

Reply 5 of 6, by Jo22

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You can also turn on without the VGA cable plugged in.
Later on, plug in the VGA cable and see if colour is available.

Alternatively, run some games. Some of them do directly program the VGA card and by-pass the VGA BIOS.

"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//

Reply 6 of 6, by vlask

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Have few cards like this in my collection. I guess that they have modded bios optimised for monochrome vga monitors. Because text modes are usually monochome, but if you run some graphics modes (run volkov commander or quake), they are with colors (some not with all colors).
For example STB TLI4:ERGOPowergraph with Tseng ET4000AX works like this.
http://vgamuseum.info/index.php/cards/item/46 … -tseng-et4000ax

Not only mine graphics cards collection at http://www.vgamuseum.info