[ Up ] [ Docs Home ]

Bitfields for Intel 82378/82379 ISA Clock Divisor Register

[ Back ] [ Next ]
Bit Description

7

 reserved (0)

6

 enable positive decode of upper 64K BIOS at 000F0000h-000FFFFFh, FFEF0000h-FFEFFFFFh, and FFFF0000h-FFFFFFFFh

5

 coprocessor error enable
1 = FERR# is driven onto IRQ13

4

 IRQ12/Mouse Function Enable
0 = standard IRQ12
1 = mouse

3

 RSTDRV enable
1 = assert RSTDRV until this bit cleared (for use in changing ISA bus speed)

2 - 0

 PCICLK-to-ISA SYSCLK divisor
000 = 4
001 = 3
other = reserved

See Also:

#01064,#01069