CPCWiki forum

General Category => Other retro => Topic started by: zapp_man on 23:14, 05 September 15

Title: can Amstrad PPC512 use CPC monitor or maybe MP1 or MP2 modulator
Post by: zapp_man on 23:14, 05 September 15
Hello can anyone confirm if I can use a CPC monitor with a PPC512/PPC640 and if so can I use a MP1 or MP2 modulator to power and display via a tv. I read this at old-computers.com.


Thanks in advance.
ZM
Title: Re: can Amstrad PPC512 use CPC monitor or maybe MP1 or MP2 modulator
Post by: Velktron on 14:26, 08 September 15
That sounds unlikely, as the PPC512/640 had a TTL-level CGA/MDA output, which is unsuitable for driving any kind of analog RGB monitor directly.


It's possible to build a relatively simple semi-active converter though (search for CGA to SCART), but I don't know if the CPC monitor could handle the 60 Hz scan rate.


EDIT: my bad, it seems that the PPC512 (or at least certain revisions) included a 6-pin DIN connector for Amstrad's RGB monitors:


(http://old-computers.com/MUSEUM/photos/Amstrad_PPC512_RearSides_s1.jpg)


Well, it'd be interesting to see how CGA colors were rendered through the RGB output  :o 8)
Title: Re: can Amstrad PPC512 use CPC monitor or maybe MP1 or MP2 modulator
Post by: Bryce on 14:39, 08 September 15
As far as I can remember, the analogue RGB outputs were rendered with a simple resistor network from the TTL levels, much like those CGA to SCART adapters work, so I suspect the picture quality was still crap CGA.

Bryce.
Title: Re: can Amstrad PPC512 use CPC monitor or maybe MP1 or MP2 modulator
Post by: Velktron on 15:22, 08 September 15
Quote from: Bryce on 14:39, 08 September 15
As far as I can remember, the analogue RGB outputs were rendered with a simple resistor network from the TTL levels, much like those CGA to SCART adapters work, so I suspect the picture quality was still crap CGA.

Bryce.


Well, I was referring to a "dispute" about CGA's color 6, which should be Brown instead of Dark Yellow  ;)


http://www.oldskool.org/pc/cgacal (http://www.oldskool.org/pc/cgacal)


So, does the PPC512/640 display the One True CGA Palette the Way It Was Meant To Be ? (TM)  ;D


(http://www.oldskool.org/pc/cgacal/look_ma_its_brown.png)
Powered by SMFPacks Menu Editor Mod