They use 4 Layer PCB with power and ground planes to reduce noise interference and power impedance.
PCI Slot
1 System slot (PCI), 3 I/O slots for any PCI interface card
ISA Slot
1 System slot (for Converter board which is mounted on VS's CPU Card), 2 I/O slots for any ISA interface card and 1 slot for short 8 bit interface card
Power Connector
PS/2 (P8/P9)
LED Indicator
Five power LEDs (+5V, -5V, +12V, -12V and +3.3V)
Advantage
Supports PCI bus and ISA bus in 1 system Supports 1 PCI bus system and 1 ISA bus system independently