NTSC/PAL VDP setup?
Posted: 18 Oct 2018 09:16
Hi
I Follow another Facebookgroup for the SORD computer, which had the same hardware as the Memotech, exept from a lower clock at the CPU. 3.57mhz.
The guys there talk about have to patch games written for NTSC to PAL. Like A bit have to be diffirent while setting up the VDP registers.
That is new INFO to me, the game they talk about is actually POWERPAC which i converted to the Memotech some years ago. They said the original game will not run on PAL hardware, but I did not modify any thing about the VDP setop to make it run at Memotech hardware (only tested on PAL), I also tested on Colecovison which I only tested on NTSC hardware.
The SORD computer came out before the Memotech, could they use another earlier version of the VDP?
I am quite sure the guys published the ColecoVision version of the Powerpac (Renamed Super pacman) tested the game at both PAL and NTSC ColecoVIsions and ADAM computers.
I know at the TMS9938 and 9958 you could change the PAL/NTSC mode by a register bit.
Also should there be a problem running Memotech Games on NTSC hardware, I am quite sure Memotech did not have special NTSC versions of the Games for the NTSC market, we know MIKE have a NTSC Memotech, but not sure how many was sold to the US.
I Follow another Facebookgroup for the SORD computer, which had the same hardware as the Memotech, exept from a lower clock at the CPU. 3.57mhz.
The guys there talk about have to patch games written for NTSC to PAL. Like A bit have to be diffirent while setting up the VDP registers.
That is new INFO to me, the game they talk about is actually POWERPAC which i converted to the Memotech some years ago. They said the original game will not run on PAL hardware, but I did not modify any thing about the VDP setop to make it run at Memotech hardware (only tested on PAL), I also tested on Colecovison which I only tested on NTSC hardware.
The SORD computer came out before the Memotech, could they use another earlier version of the VDP?
I am quite sure the guys published the ColecoVision version of the Powerpac (Renamed Super pacman) tested the game at both PAL and NTSC ColecoVIsions and ADAM computers.
I know at the TMS9938 and 9958 you could change the PAL/NTSC mode by a register bit.
Also should there be a problem running Memotech Games on NTSC hardware, I am quite sure Memotech did not have special NTSC versions of the Games for the NTSC market, we know MIKE have a NTSC Memotech, but not sure how many was sold to the US.