Specifications

73
MISCSET Register 1
Index: 1 Data Port Description
MISCSET 1 RES ROM CC V48K VGADIS VGARS RES RES
PWR x 0 0 0 0 0 x x
r r/w r/w r/w r/w r/w x x
D7 D6 D5 D4 D3 D2 D1 D0
Index: 2 Data Port Description
WDTRIG x x x x x x x x
PWR x x x x x x x x
x x x x x x x x
D7 D6 D5 D4 D3 D2 D1 D0
Bit Name Function
7 RES (reserved)
6 ROM Disable VGA-ROM at address C0000h
0 = VGA-ROM on
1 = VGA-ROM off
5 CC Disable VGA-ROM at address C0000h
0 = VGA-ROM on
1 = VGA-ROM off
4 V48K Select VGA-ROM size
0 = 48 kB
1 = 32 kB
3 VGADIS Disable on-board VGA controller
0 = WD90C24A on
1 = WD90C24A off
2 VGARIS Disable on-board VGA controller
0 = WD90C24A on
1 = WD90C24A off
1 - 0 RES (reserved)
The watchdog timer is reset by a write operation to this register.
Watchdog Retrigger