Hello New to this forum but nice to see somebody else with a Speed Freak
I have been working on one for some years after picking up a complete but broken Vectorbeam SF. I managed to get about four hours of game play out of it after getting the ALU PCB repaired. then it broke again so sent it back some time ago to the repairer and still to this day waiting for an update. All of this has happened over a 10 year period.
Any way there are a few old repair log around which sort of help if you haven't already found then and the best thing to date is this fellow
http://www.biltronix.com/cinexor.html as he seems to have replicated the repair unit that allows one to fault find the PCB. He also lists out the other links for info.
Also there is important modifications required to the vector monitor as a failure with the cap's can cause the DAC's to get damaged these mod's are listed in some of the documentation that can be downloaded. Also the main ALU PCB is a far as I know the same for all Vectorbeam/Cinematronics more or less with from memory only slight changes to how the ROM's are placed on the PCB.
Way way back in the past I did modify the ROM's as mine still ran the very old and rare 2504? with its daughter board and replaced them with with two 2716's from memory by combining the two bank data into two A & B Rom code which then allowed me to replace the daughter PCB with the two chips on the ALU. Unfortunately the board still had other problems hence sending it out for what has been a 6 year adventure.
Let us know how you go with this beast of a game, Its actually not bad to play when it works and even tho the graphics are simple it runs very smooth as the vector system works fast.
GM
