Hi,
I got this Soyo SY-015H MB a bit corroded, try to revive. Retroweb helped me to identify the board but there is no documentation for this MB. Most of the jumpers are printed well but some has only the JPxx silkscreen. If somebody has info about this MB please share with me. Thank you!
There’s not much to know. The cache is integrated into the chipset and the cpu is soldered down. There’s not really much to configure.
"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium
Thank you your reply!
I was not able to identify the function and pinout of the following jumpers:
- J5, next to the oscillator circuit
- JP51 next to the BIOS
-JP3 next to the keyboard controller
-J16 next to the CPU
-J20 next to the DIN keyboard connector
All the oher jumpers are self explanatory more or less.
I have no experience with 30-pin SIMM expansion of the 386 boards. Which modules are acceptable for this MB? 1,4,8MB? With parity or no parity? What is the minimum amount of memory - number of SIMM -for testing? I hoped there is some documentation to answer these questions. I think people with lot of experience on this field can answer these questions without docs but I am a bit cautious, try to avoid sourcing wrong memory modules.
-J5, next to the oscillator circuit: it's silkscreened in the middle of the board. My guess is that the same board was also sold with a 33MHz CPU which needs a 66MHz crystal and it's one of the 3 jumpers to set 66 or 80MHz
-JP51 next to the BIOS: if it has 3 pins and is next to the BIOS, almost certainly it's for clearing the CMOS settings
-J20 next to the DIN keyboard connector: external battery connector
-JP3 next to the keyboard controller: no idea
-J16 & J10: just guessing here, but they might be related to the FPU or cache
mita wrote on 2024-02-15, 17:10:I have no experience with 30-pin SIMM expansion of the 386 boards. Which modules are acceptable for this MB? 1,4,8MB? With parity or no parity? What is the minimum amount of memory - number of SIMM -for testing? I hoped there is some documentation to answer these questions. I think people with lot of experience on this field can answer these questions without docs but I am a bit cautious, try to avoid sourcing wrong memory modules.
It's a DX, so you need to 4 modules to fill 1 bank. It's a late 386 so 8MB SIMMS will probably get recognized, but 1MB and 4MBs are a safe choice (and there is no need for more than 16MB of RAM on a 386 to be honest)
OK, Thank you!
