参考资料：
https://stason.org/TULARC/pc/motherboards/A/AST-RESEARCH-INC-386-PREMIUM-II-386SX-20-MH-Versio.html
Processor
80386SX(on external CPU/Memory module)
Processor Speed
20MHz
Chip Set
AST
Max. Onboard DRAM
None (16MB on external CPU/Memory module)
Cache
None (16KB on external CPU/Memory module)
BIOS
AST
Dimensions
344mm x 250mm
I/O Options
16-bit external CPU/Memory module slot
16-bit external Memory module slot (2)
bus mouse port, floppy drive interface
IDE interface, parallel port, serial port (2), SVGA port
NPU Options
80387SX(on external CPU/Memory module)
