Accessing the CMOS (Cont.)
Bitfields for AMI (Saturn) parallel port:
Bit(s) Description (Table C065)
4 IRQ active high
3 parallel port extended mode
1-0 parallel port address
----------R4C--------------------------------
CMOS 4Ch - AMI (PicoPower) - CLOCK SPEEDS
Bitfields for AMI (PicoPower) clock speeds:
Bit(s) Description (Table C066)
7-6 back-to-back I/O delay
00 none
01 1 SYSCLK
10 2 SYSCLKs
11 3 SYSCLKs
5-3 Turbo clock select
001 CLK2IN/3
010 CLK2IN/4
011 CLK2IN/5
100 CLK2IN/6
101 CLK2IN/7
110 CLK2IN/8
111 CLK2IN/9
2-0 SYSCLK select (same as for Turbo clock select)
----------R4D--------------------------------
CMOS 4Dh - AMI (Saturn) - RESERVED
----------R4D--------------------------------
CMOS 4Dh - AMI (PicoPower) - MIDDLE BIOS
Note: Middle BIOS is enabled if bit 1 set
----------R4D--------------------------------
CMOS 4Dh - AWARD - USER PASSWORD
See Also: CMOS 4Eh"AWARD",CMOS 1Ch"AWARD"
----------R4E--------------------------------
CMOS 4Eh - AMI (Saturn) - SERIAL PORT
Bitfields for AMI (Saturn) serial port:
Bit(s) Description (Table C067)
7-5 serial port 1
4-2 serial port 2
0 manual programming mode
----------R4E--------------------------------
CMOS 4Eh - AMI (PicoPower) - TURBO BUS VIDEO
Bitfields for AMI (PicoPower) Turbo Bus video:
Bit(s) Description (Table C068)
2 memory enabled
1 I/O enabled
----------R4E--------------------------------
CMOS 4Eh - AWARD - USER PASSWORD
See Also: CMOS 4Dh"AWARD",CMOS 1Ch"AWARD"
----------R50--------------------------------
CMOS 50h - AWARD - PCI Bus Slot 1 Latency Timer 0-255 (default: 0)
----------R51--------------------------------
CMOS 51h - AMI - MEMORY ACCESS CONTROL
Bitfields for AMI memory access control:
Bit(s) Description (Table C069)
7 Bank 0/1 RAS Precharge
6 Bank 0/1 Access Wait States
3-2 Bank 0/1 Wait States
----------R51--------------------------------
CMOS 51h - AWARD - PCI Bus Setup
Bitfields for AWARD PCI bus setup:
Bit(s) Description (Table C070)
7 PIRQ0# Interrupt Triggering
0 = Edge Sensitive,
1 = Level Sensitive
6-2 ??? Default: all 1's
0-1 Slot 1 IRQ Setup
00 = A-PIRQ0 (Default)
01 = B-PIRQ1
10 = C-PIRQ2
11 = D-PIRQ3
----------R52--------------------------------
CMOS 52h - ???
----------R52--------------------------------
CMOS 52h - AWARD - PCI Bus Slot 2 Latency Timer 0-255 (default: 0)
----------R53--------------------------------
CMOS 53h - AMI - MEMORY ACCESS CONTROL
Bitfields for AMI memory access control:
Bit(s) Description (Table C071)
7 Bank 2/3 RAS Precharge
6 Bank 2/3 Access Wait States
3-2 Bank 2/3 Wait States
----------R53--------------------------------
CMOS 53h - AWARD - PCI Bus Setup
Bitfields for AWARD PCI bus setup:
Bit(s) Description (Table C072)
7 PIRQ1# Interrupt Triggering
0 = Edge Sensitive,
1 = Level Sensitive
6-2 ??? Default: all 1's
0-1 Slot 2 IRQ Setup
00 = A-PIRQ1 (Default)
01 = B-PIRQ2
10 = C-PIRQ3
11 = D-PIRQ0
----------R547F------------------------------
CMOS 54h-7Fh - ???
----------R54--------------------------------
CMOS 54h - AWARD - PCI Bus Slot 3 Latency Timer 0-255 (default: 0)
----------R55--------------------------------
CMOS 55h - AWARD - PCI Bus Setup
Bitfields for AWARD PCI bus setup:
Bit(s) Description (Table C073)
7 PIRQ2# Interrupt Triggering
0 = Edge Sensitive,
1 = Level Sensitive
6-2 ??? Default: all 1's
0-1 Slot 3 IRQ Setup
00 = A-PIRQ2 (Default)
01 = B-PIRQ3
10 = C-PIRQ0
11 = D-PIRQ1
----------R56--------------------------------
CMOS 56h - AWARD - ??? reserved for PCI Bus Slot 4 Latency Timer ???
----------R57--------------------------------
CMOS 57h - AWARD - PCI Bus Setup
Bitfields for AWARD PCI bus setup:
Bit(s) Description (Table C074)
7 PIRQ3# Interrupt Triggering
0 = Edge Sensitive,
1 = Level Sensitive
6-0 ???not used Default: all 1's
----------R58--------------------------------
CMOS 58h - AWARD - ??? reserved for PCI Bus Slot 5 Latency Timer ???
Bitfields for AWARD PCI bus slot 5 latency timer:
Bit(s) Description (Table C075)
3 onboard CMD IDE Mode 3
----------R59--------------------------------
CMOS 59h - AWARD - ??? reserved for PCI Bus Setup ???
----------R5A--------------------------------
CMOS 5Ah - AWARD - PCI Bus IRQ Setup 1
Bitfields for AWARD PCI bus IRQ setup 1:
Bit(s) Description (Table C076)
4-7 PIRQ1# Interrupt Line (0=none, Bh=IRQ11, etc)
0-3 PIRQ0# Interrupt Line " " "
----------R5B--------------------------------
CMOS 5Bh - AWARD - PCI Bus IRQ Setup 2
Bitfields for AWARD PCI bus IRQ setup 2:
Bit(s) Description (Table C077)
4-7 PIRQ3# Interrupt Line (0=none, Bh=IRQ11, etc)
0-3 PIRQ2# Interrupt Line " " "
----------R5C--------------------------------
CMOS 5Ch - AMI (PicoPower) - LOW-SPEED CLOCK
Bitfields for AMI (PicoPower) low-speed clock select:
Bit(s) Description (Table C078)
2-0 low-speed clock divisor
000 /1
001 /2
010 /4
----------R5C5F------------------------------
CMOS 5Ch-5Fh - AWARD - ??? unused ???
Note: Defaults to all FFh's.
----------R5D--------------------------------
CMOS 5Dh - AMI (PicoPower) - DOZE MODE
Bitfields for AMI (PicoPower) doze mode control:
Bit(s) Description (Table C079)
7 APM enabled
6-4 doze mode CPU clock speed (see #C080)
3 hotkey setup enabled
2-0 "sleep mode" CPU CLK speed (see #C080)
See Also: #C082
(Table C080)
Values for AMI (PicoPower) CPU clock speeds:
000 MAX
001 MAX/2
010 MAX/4
011 MAX/8
100 MAX/16
101 MAX/32
110 MAX/64
See Also: #C079,#C082
----------R5E--------------------------------
CMOS 5Eh - AMI 1990 Hyundai super-NB368S notebook - ???
00h when values from bios defaults
34h when values from power up defaults
----------R5E--------------------------------
CMOS 5Eh - AWARD v4.50G - ?
See Also: CMOS 5Fh"AWARD"
Bitfields for AWARD register 5Eh:
Bit(s) Description (Table C081)
0 user password enabled
See Also: #C012
----------R5E5F------------------------------
CMOS 5Eh-5Fh - AMI (PicoPower) - CPU SPEEDS
Bitfields for AMI (PicoPower) CPU speeds:
Bit(s) Description (Table C082)
7 suspend warning beeps enabled
6-4 "full on" CPU CLK speed
000 MAX
001 MAX/2
010 MAX/4
011 MAX/8
1-0 power management mode
00 disabled
01 Auto
10 enabled
See Also: #C079
----------R5F--------------------------------
CMOS 5Fh - AMI (PicoPower) - POWER MANAGEMENT TIMEOUTS
Bitfields for AMI (PicoPower) power management timeouts:
Bit(s) Description (Table C083)
7 enable battery-low beeps
5-3 SUSPEND timeout
000 disabled
001 5 minutes
010 10 minutes
011 15 minutes
100 20 minutes
101 30 minutes
110 40 minutes
111 60 minutes
2-0 DOZE timeout
000 disabled
100 1 second
101 4 seconds
110 8 seconds
111 16 seconds
See Also: #C085
----------R5F--------------------------------
CMOS 5Fh - AWARD v4.50G - USER PASSWORD CHECKSUM
See Also: CMOS 5Eh"AWARD"
----------R60--------------------------------
CMOS 60h - AWARD - POWER MANAGEMENT
Bitfields for AWARD power management:
Bit(s) Description (Table C084)
7 ???
6 Video Off Method
1 = V/H SYNC + Blank (default)
0 = Blank Screen
4,5 Video Off Option
00 = Always On (default)
01 = Suspend -> Off
10 = Suspend, Standby -> Off
11 = All Modes -> Off
3 PM Control by APM (1=Yes)
2 ???
1,0 Power Management Setup
00 User Defined
01 Disabled (default)
10 Minimum Power Savings (40 Minutes for all events)
11 Maximum Power Savings (20 Seconds for all events)
----------R60--------------------------------
CMOS 60h - AMI (PicoPower) - SLEEP TIMEOUT