6
Features and Specifications
PROCESSOR
Intel Pentium 75/90/100/120/133/150/166/200MHz CPUs
Future Intel Pentium OverDrive processor
•
Cyrix 6x86 P120+/P133+/P150+/P166+/P200+ CPUs
SYSTEM CLOCK
•
CPU external clock: supports 75MHz, 66.6MHz, 60MHz, 55MHz
and 50MHz
PCI clock: 33MHz - 25MHz depending on the CPU external clock
Relation between CPU clock and PCI clock:
CPU Clock
75MHz
66.6MHz
60MHz
55MHz
50MHz
PCI Clock
32MHz
33.3MHz
30MHz
27.5MHz
25MHz
PCI bus clock/4 = ISA bus clock
ISA bus clock = Keyboard clock
ISA Bus Clock
8MHz
8.4MHz
7.5MHz
7MHz
6MHz
SYSTEM CONTROLLER
VLSI Lynx system controller
-
VL82C541: CPU interface, cache and DRAM control, data bus
control, and PCI control
-
VL82C543: ISA control, PCI to ISA bridge, DMA, and interrupt
control
CACHE MEMORY
•
256KB (32Kx32x2-6ns) or 512KB (64Kx32x2-6ns) pipeline burst,
direct map write-back cache installed on the system board
SYSTEM MEMORY
Four 72-pin SIMM sockets
8MB to 256MB onboard memory
Uses EDO (60ns) or fast page mode (60ns) x32 or x36 DRAM,
50ns or 60ns 5V
Parity check supported (using x36 DRAM)
