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The system board is composed of the following major components:
K Microprocessor
One Pentium processor with VRT 64-bit microprocessor
Pentium processor operates at 75 MHz and 3.3/2.9 volts
The math co-processor and 16KB cache memory are integrated into Pentium
K Standard RAM
8 MB, four 1Mx16-bit chips
3.3 volt operation
No parity bit
Access time 70 ns
Data transfer is 64-bit width
EDO (extended data output) supported
K BIOS ROM (Flash EEPROM)
128 KB (one 128Kx8-bit chip) memory
64 KB in the ROM are used for system BIOS
48 KB in the ROM are used for VGA BIOS
16 KB in the ROM are reserved
Access time 150 ns
Data transfer is 8-bit width
K Video RAM
1 MB (Two 256Kx16-bit DRAM)
5 volt operation
K Optional memory
One expansion memory slot is available for 8, 16, and 32 MB memory modules, which
consist of 1 MBx16-bit chips
Total maximum memory size is 40 MB (if a 32 MB memory module is installed)
3.3 volt operation
No parity bit
Access time 60 ns
Data transfer is 64-bit width
EDO (extended data output) supported
K One super integration (SI)
The following components:
- Two DMACs
- Two PICs
- Two SIOs
- Two UARTs
- One PIT
- One FDC
- One VFO
- One I/O port decoder
- One SIO port control
- One printer port control supported ECP
- One FDD control
- One speaker control
- One power communication control
100CS
82C37 equivalent
82C59 equivalent
16550 equivalent (One SIO is not used)
16550 equivalent
82C54 equivalent
TC8565 equivalent
TC8568 equivalent
1-5
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Troubleshooting
