One Commander 3.58 instal the new version for apple

I'm fairly confident this will work, but I thought I'd post here so anyone can say this is a crazy idea before I get in too deep. I'm using this approach so I don't have to do any mods to the MSX's motherboard and I can just pop in the old VDP if I want things to go back the way they were. The adapter is intended to go in the sandwich of: TMS9128 - socket - TMS-RGB - adapter - pin headers - socket - MSX motherboard. Adds 470 ohm load resistors on the Y, R-Y, and B-Y pins as there is no connection to the motherboard on this adapter for those pins. Moves the TMS9128 CPUCLK signal from pin 37 to pin 38, where it is on the TMS9118 I've created this adapter PCB design that does the following: Another bonus is that the TMS9128 supplies CPUCLK, which this particular computer needs. I'm going to attempt using a TMS-RGB to add RGB, swapping in a TMS9128 (needed instead of a TMS9928A because of the RAM interface). This is the variant that has composite output and supports 16Kx4 video RAM chips. I have a Sony HB-101 'HitBit Mezzo' MSX computer that uses the relatively rare TMS9118 VDP. Should I assume that the monitors have 75ohm resistors built on RGB? How about sync? Should I short the four 75 ohm pads on the TMS RGB?Īny help I can get is REALLY appreciated! Do I need to connect the 5v pad on the TMS RGB to a 5v source, or is this a output? Do I need to use the S-TTL pad for Csync on the VGA connector? Can I be sure that it isn't a TMS9918A?īefore I pull the computer apart and check it over I thought I'd ask some questions. The heatsink is glued to the TMS9928A chip, so I can't be 100% sure that it actually is a TMS9928A chip - but all the documentation I can find say that's what is used in these Adam computers. These monitors support 15Khz on the VGA connector, and I can run Amiga RGB, Atari ST RGB, Apple IIgs RGB, C128 RGB (with a custom cable), TRS-80 Coco 3 RGB (with generated Csync added) and get a great picture. I have two monitors here that should work with this connection, but I am getting no display on either of them. I wired it to a 15pin VGA connector as follows: I'm pretty sure that there are no shorts, and that I soldered all the pads on the TMS RGB board to the TMS chip. I was careful during the install, and checked my connections before putting the Adam back together. I just installed the TMS RGB board in an NTSC Coleco Adam system.

One Commander 3.58 instal the new version for apple