[Coladam] VDP upgrade?
oltmansg at bellsouth.net
oltmansg at bellsouth.net
Thu Aug 31 10:55:42 EDT 2006
I used to have a TIM board that I converted to work with the Adam....before I bought my house that is, and started unloading a bunch of old stuff. :)
Worked allright for EOS native stuff, but I had trouble with colecovision games for some reason. Wrote a small program to initialize the palette registers on it so it could be used. Like you, I used mine with an old Amiga monitor.
Only problem with the AIM/TIM option is that they're rare. 9938s and 9958s are hard to come by in the states too, as they were mostly for the MSX stuff and that never really caught on here. The SMS caught my eye since they are relatively abundant on this side of the pond.
> From: "Dale Wick" <dalemwick at hotmail.com>
> Date: 2006/08/31 Thu AM 10:41:36 EDT
> To: oltmansg at bellsouth.net, coladam at adamcon.org
> Subject: RE: [Coladam] VDP upgrade?
> I have an AIM board on my Adam (Adam-Image-Maker). It was a prototype
> created by Osais Penseive Abacutors. It contains a V9958 and 128k of RAM.
> It works pretty well. I wrote drivers for it for BASIC, assembly and C.
> It shares all components except the addresser chip and the timing crystal
> with the TIM (TI-Image-Maker). So it would theoretically be possible to
> convert a TIM into an AIM if you could find a used one. The AIM was fist
> shown at AdamCon 5, and the finished version was shown at AdamCon 9.
> Since my version outputs only RGB, I use it with an NTSC RGB monitor (an
> Amiga monitor is suitable), and get extremely crisp video out of it.
> If you come to AdamCon in Ottawa, I'll bring it and demo the hardware line
> drawing/blitting/256 colour mode.
> >From: Geoff Oltmans <oltmansg at bellsouth.net>
> >To: Adam Coleco <coladam at adamcon.org>
> >Subject: [Coladam] VDP upgrade?
> >Date: Wed, 30 Aug 2006 07:21:54 -0500
> >This may have been done already, but I figured I'd ask.
> >While hunting around for info on the Yamaha V9938/9958 VDPs, I stumbled
> >across information talking about the Sega SG-1000 and Sega Master System.
> >The SG-1000 uses the same hardware that the ColecoVision uses (same sound
> >chip, same vdp, same processor). Then I looked at the SMS, which is SG-1000
> >compatible. Turns out that it's VDP is a derivative of the 9918 as well,
> >but with some additional graphics modes (and more colors, up to 64) and
> >also a SN76489 sound generator built in (same as the CV/Adam uses).
> >Has anyone ever attempted to interface one of these chips to the Adam as an
> >Coladam mailing list
> >Coladam at adamcon.org
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