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32-bit acorn hardware • Re: Acorn Archimedes A410 monitor option

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Hi, I wanted to take care of my A410 today (got it some times ago, but didn't had time until today to power it on). I'm stuck on something very simple: I don't find a way to output something. First I thought that the DB9 video output is similar to CGA and therefore I tried a RGB2HDMI, without success. Then I googled a bit and found out that it's not at all CGA
It's as good as "VGA" really. You can wire directly to any VGA/SVGA monitor and off the shelf dumb DB9 to HD15 ("CGA to VGA") adapters work just fine. e.g. https://www.amazon.co.uk/dp/B005M1M4J2
. I have a small extension called VIDC plugged on the motherboard, but its looks disconnected (only the ground is hooked to the backplane, another wire is hanging in the case, and there is a jack lead on the outside attached to the board. I tried to remove the board and putted the jumpers back (I think that it's designed this way), but it doesn't help.
That's a "VIDC enhancer" - designed to overclock the VIDC to allow higher resolutions such as SVGA. I'd remove it, at least for now, as it requires control software to be of any use anyway. (And yes, you must fit the two shunts instead)

Given that my goal is to run RiscIX on this machine, what is my best option? I have a 15Khz compatible monitor (NEC LCD 1970), but I don't know if this help.
Hold down '3' on the keypad whilst you turn it on - keep that held down until you see text on the screen. That forces the machine to believe it has a VGA ("30kHz") monitor attached, rather than the default TV res "15kHz". Attach a VGA-capable monitor and you should be good to go. You definitely don't want to be messing with 15kHz for iX.

Statistics: Posted by IanJeffray — Sun Dec 15, 2024 6:28 pm



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