Tried 1024KB cache on this board, doesnt seems to work. Also trying to set the nearst by jumpers on every setting possible. Ending in a board that locks on boot, or dont want to start (black screen)
Before using the 1024KB chips i verified them with my Mini pro and they seems to be good. Does that mean that not every board with 32 pin dip cache sockets will actually will support 128x8 sram chips? PCB say so. 128*8.
Then i going further with 256KB srams that i have in spare. Installed them.. Board is starting.. and detects 256Kb cache. Only bad thing its slow as hell on boot trying detecting ide controller..
Iam also thinking it could be an industrial motherboard. But it its not strange that pre-pentium class motherboard didnt had floppy or IDE on board. I think that this board was released between socket 4 and the first socket 5 boards.
Board works with a PTI-277w version 3 isa controller.. No errors anymore. Yeah..
Only have to find out the jumper settings of this motherboard. And that is pretty hard without any documentation or manual. any suggestions?
And iam waiting on some RTC replacements. I dont know if the max of this board is Pentium 133. But i find this already special for a pre-socket 5 board.
Iam guessing that JP23 Jumper is for the multiplier.. Because when removed it makes from the pentium 133 to 100 Mhz.. When close its 133mhz. (so i think its a 1.5 / 2.0 multiplier..) I dont think that the board have a higher multiplier then 2x for its time period.
Somebody knows if there are dos programs that detects the processor frontside bus as the multiplier?
And i found the FSB Jumpers @ JP9 (horizontal position)
Pin 1-2 & Pin 3-4 closed - closed 66mhz FSB with Jp23 open = 100 Mhz CPUclock closed = 133 Mhz CPUclock
Pin 1-2 & Pin 3-4 open - closed 33 mhz FSB with jp23 open = 50 Mhz CPUclock closed = 66Mhz CPUclock
Pin 1-2 & Pin 3-4 closed - open 60 mhz FSB with jp23 open = 90 Mhz CPUclock closed = 120Mhz CPUclock
Pin 1-2 & Pin 3-4 open - open 50mhz with jp23 open = 75 Mhz CPUclock closed = 100 Mhz CPUclock
~ At least it can do black and white~