Compaq 4000N User Manual
Page 149
Technical Reference Guide
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
8-9
Peripheral and Input Device Record, SIT Record 07h
Byte
Function
Default
Value
00h
Record ID
07h
01h
No. of Data Bytes in Record
34h
02h
DMA Functions, SCSI Support, Flashable ROM, Setup
Partition, 101 Keyboard
07h
03h
Erase-Eaze Kybd. Support in ROM, El Torito CD Boot
Support, QuickBoot, ROM Functions
53h
04h
Formfactor
04h, DT
05h, MT
05h
Softdrive 1 & 2 Data
FFh
06h
Softdrive 3 & 4 Data
FFh
07h-0Ah
Softdrive 1-4 Starting Address
all 0s
0Bh
Panel ID
00h
0Ch
Integrated Monitor, ROM Socket, No. of Prog. Serial Ports
12h
0Dh
Parallel Port Mode, Modem Type
00h
0Eh
Drive Fault Prediction Support for Drives 0-3
F1h
0Fh, 10h
PCI Bus Master CMOS Data
0000h
11h, 12h
VGA Palette Snoop Function
0000h
13h
Misc. PCI Information
01h
14h, 15h
I/O Address for I
2
C Device
00h
16h
I
2
C Information Byte
00h
17h
ATAPI Device Information (Logical Devices 1 & 2)
00h
18h
ATAPI Device Information (Logical Devices 3 & 4)
00h
19h
3-D Audio Support
00h
1Ah
BIOS Supported Features
00h
1Bh
Misc. Features (Power Inhibit Support)
01h
1Ch, 1Dh
Back-to-Back I/O Delay Index 0
0420h
1Eh, 1Fh
Back-to-Back I/O Delay Index 1
0300h
20h, 21h
Back-to-Back I/O Delay Index 2
0660h
22h, 23h
Back-to-Back I/O Delay Index 3
0780h
24h
Back-to-Back I/O Delay NVRAM Location
n/a
25h
Bit Mask for Byte 24h
n/a
26h
O/S Boot NVRAM Location
n/a
27h
Bit Mask for Byte 26h
n/a
28h-2Bh
IDE Drive 0-3 Max DMA/PIO Mode
n/a
2Ch-2Dh
Offset Address in EBDA for Bezel Button
n/a
2Eh
Processor Upgrade Mounting
01h
2Fh
Parallel Port Connector Type/Pinout
41h
30h
Serial Port Connector Type
01h
31h
Serial Port Maximum Speed
16h
32h
Serial Port Maximum Speed
E3h
33h
Serial Port Maximum Speed
60h
34h
DMA Burst Mode Support
0Bh
35h
Keyboard Connector Type
13h