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Technical Reference Guide
Compaq Deskpro EN Series of Personal Computers
Desktop and Minitower Form Factors
Third Edition - September 1998
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 3Ah
02h DMA Functions, SCSI Support, Flashable ROM, Setup
Partition, 101 Keyboard
27h
03h Erase-Eaze Kybd. Support in ROM, El Torito CD Boot
Support, QuickBoot, ROM Functions
53h
04h Formfactor [1]
05h Softdrive 1 & 2 Data FFh
06h Softdrive 3 & 4 Data FFh
07h-0Ah Softdrive 1-4 Starting Address B0 B5 BA BFh
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 [1]
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 0000h
16h I
2
C Information Byte 00h
17h ATAPI Device Information (Logical Devices 1 & 2) [1]
18h ATAPI Device Information (Logical Devices 3 & 4) [1]
19h 3-D Audio Support 00h
1Ah BIOS Supported Features 01h
1Bh Misc. Features (Power Inhibit Support) 01h
1Ch, 1Dh Back-to-Back I/O Delay Index 0 [1]
1Eh, 1Fh Back-to-Back I/O Delay Index 1 [1]
20h, 21h Back-to-Back I/O Delay Index 2 [1]
22h, 23h Back-to-Back I/O Delay Index 3 [1]
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 00h
27h Bit Mask for Byte 26h 00h
28h-2Bh IDE Drive 0-3 Max DMA/PIO Mode [1]
2Ch-2Dh Offset Address in EBDA for Bezel Button n/a
2Eh Processor Upgrade Mounting 06h
2Fh Parallel Port Connector Type/Pinout 41h
30h Serial Port Connector Type 01h
31h Serial Port Maximum Speed 01h
32h Serial Port Maximum Speed C2h
33h Serial Port Maximum Speed 00h
34h DMA Burst Mode Support [1]
35h Keyboard Connector Type 03h
36h System UDMA Capabilities 0Fh
37h Diskette Type Installed 01h
38h On-Board NIC Speed 00h
39h On-Board NIC Attributes 00h
3Ah General Purpose Software Support [1]
3Bh System EDMA Support 0Fh
NOTE:
[1] Determined at run time.