Deskpro 486/25

FEATURES AND SPECIFICATION

CONFIGURATION

SPARE PART NUMBERS

OPTION PART NUMBERS


SPARE PART NUMBERS - DISKETTE DRIVES

Drive Size	Spare PN
360 KB	112567-001
1.2 MB	112566-001
1.44 MB *	112565-001

* Requires MS-DOS Version 3.31 Revision A if installed as drive B, and MS-DOS

  Version 3.31 Revision B if installed as drive A.


SPARE PART NUMBERS - HARD DRIVES

Drive Size	Drive Type	Interleave	Integrated	Minimum ROM	Spare PN	Assy No.
120 MB	50	1:1	Yes	091689	122080-001	NA
210 MB	51	1:1	Yes	091689	124013-001	NA
320 MB	28	1:1	No	091689	115182-001	001628
650 MB	49 è	1:1	No	091689	115181-001	001628     WD1009
Hard Drive Expansion Unit						001628   WD1009

è Drive type 49 with MS-DOS, drive type 42 with MS OS/2 Version 1.0, and

drive type 41 with operating systems from SCO.

HARD DRIVE ARRAY PAIRS

Drive Size	Drive Array	Minimum ROM	Spare PN	Controller Assy No.
120 MB	240 MB	091689	116806-001 è	001373     002037
210 MB	420 MB	091689	116805-001 è	001373      002037

è Spare part numbers are for individual hard drives used in drive

array pairs.  Spares kits DO NOT contain mounting hardware.


SPARE PART NUMBERS - SYSTEM BOARDS

Board Type	Assy No.	Spare PN	Switch/Jumper
486 System Board	001532	120548-001	Yes


SPARE PART NUMBERS - CONTROLLERS

Board Type	Assy No.	Spare PN	Switch/Jumper
Advanced ESDI ControllerBoard	WD1009	122370-001	Yes
Tape Adapter Board (135 MB and 150/250 MB)	000774	113259-001	Yes
32 Bit Intelligent Drive Array Controller (IDA)	001373	116807-001	No
32 Bit Intelligent Drive Array Controller (IDA)	002037	116807-001	No
SCSI Option Adapter Board	001379	116809-001	Yes
15 MHz ESDI Controller Board	001628	121667-001	Yes
32 Bit DualSpeed Token Ring Controller Board	114564-001	120615-001	No
Enhanced 32 Bit DualSpeed Token Ring Controller	114564-002	120662-001	No
SCSI Compression Adapter	001846	122185-001	Yes


SPARE PART NUMBERS - ROMS

System ROM Revisions (Spare PN 116797-001)

Rev #      PN on ODD ROM   PN on EVEN ROM

091689     116686-001      116687-001

101189     116686-003      116687-003

101989     116686-004      116687-004

112989     119863-002      119864-002

120689     119863-003      119864-003

020990     123151-001      123152-001

080190     122035-001      122036-001

101590     122035-002      122036-002

032291     126865-001      126866-001

040491     126865-002      126866-002

092391     126865-004      126866-004


GENERAL - SYSTEM BOARDS

Model 650

 > Four megabytes of 32-bit system memory (RAM)

 > 5 1/4-inch 1.2-Megabyte Diskette Drive

 > 650-Megabtye Fixed Disk Drive (full-height)

 > 15-MHz ESDI Controller

 > Six full-sized 8-/16-/32-bit EISA expansion slots available

Model 320

 > Four megabytes of 32-bit system memory (RAM)

 > 5 1/4-inch 1.2-Megabyte Diskette Drive

 > 320-Megabtye Fixed Disk Drive (half-height)

 > 15-MHz ESDI Controller

 > Six full-sized 8-/16-/32-bit EISA expansion slots available

Model 120

 > Four megabytes of 32-bit system memory (RAM)

 > 5 1/4-inch 1.2-Megabyte Diskette Drive

 > 120-Megabtye Fixed Disk Drive (half-height)

 > 15-MHz ESDI Controller

 > Six full-sized 8-/16-/32-bit EISA expansion slots available

Standard Features -- All Models

 > 25-MHz 486 Microprocessor (80486DX)

 > 8-KBytes internal RAM Cache

 > 128-KBytes Second-level RAM Cache

 > Interleaved Memory Architecture (80-ns DRAM)

 > Four megabytes of 32-bit system memory (RAM)

   - expandable to 100 megabytes

 > Socket for 25-MHz Weitek 4167 Numeric Coprocessor

 > Eight full-sized expansion slots

   - One 32-bit high-speed memory slot

   - Seven full-sized 8-/16-/32-bit EISA slots

 > Seven internal storage device positions

 > One 5 1/4" 1.2-Megabyte Diskette Drive

 > Integrated Video Graphics System

 > VGA Pass-Through

 > Enhanced Keyboard

 > Parallel, Asynchronous (Serial) Communications, and

   Pointing Device Interfaces

 > EISA Configuration Utility

 > Compaq Expanded Memory Manager (CEMM)

 > Disk Cache Utility

 > Security Lock, Power-On Password, Keyboard Password,

   and Network Server Mode

 > 300-Watt Power Supply with ALS


CONFIGURATION - HARD DRIVES

SINGLE AND ARRAYED SWITCH SETTINGS

DRIVE           SETTING

120-MB*         C/D ON, DSP OFF

210-MB          C/D (R15) ON, DSP (R14) OFF

320-MB          Terminating Resistor INSTALLED

* Setting for single configuration, C Drive

DUAL CONFIGURATION JUMPER/SWITCH SETTINGS

C: DRIVE	SETTING	D: DRIVE	SETTING
120-MB	DSP ON, C/D ON	120-MB	DSP OFF, C/D OFF
210-MB	DSP ON, C/D ON	210-MB	DSP OFF, C/D OFF
320-MB	Terminating Resistor	Terminating Resistor
	INSTALLED	REMOVED


CONFIGURATION - SYSTEM BOARD

COMPAQ DESKPRO 486/25 System Board Jumper Settings

Jumper	Position	Status	Function
E1	1 and 2	Maintenance	Configuration
	2 and 3 (default)	Standard
E2	1 and 2	Disabled	Power On Password
	2 and 3 (default)	Enabled
E3	1 and 2	Disabled	Integrated VGA
	2 and 3 (default)	Enabled


CONFIGURATION - VIDEO

System Board (001532)

Jumper	Pins	Function
E3	2 - 3*	Enable Integrated VGA
E3	1 - 2	Disable Integrated VGA

* - Default


CONFIGURATION - SERIAL/PARALLEL INTERFACE BOARD

(Assy No. 000570) Switch Settings

Switch	Function	Setting
1	Reserved	Always OFF
2	Asynchronous Interface	2 = ON	ENABLED
		2 = OFF	DISABLED
3, 4	Parallel Port Select/Disable
	LPT1 SELECTED	3 = ON	4 = ON
	LPT2 SELECTED	3 = OFF	4 = ON
	LPT3 SELECTED	3 = ON	4 = OFF
	LPT DISABLED	3 = OFF	4 = OFF
5, 6	Asynchronous interface
	COM1 SELECTED	5 = ON	6 = ON
	COM2 SELECTED	5 = OF	6 = ON

(Assy No. 000990) Switch Settings

Switch	Function	Setting
1	Reserved	Always OFF
2	Reserved	Always OFF
3, 4	Parallel Port Select/Disable
	LPT1 SELECTED	3 = ON	4 = ON
	LPT2 SELECTED	3 = OFF	4 = ON
	LPT3 SELECTED	3 = ON	4 = OFF
	LPT DISABLED	3 = OFF	4 = OFF
5, 6	Asynchronous Interface
	COM1 SELECTED	5 = ON	6 = ON
	COM2 SELECTED	5 = OFF	6 = ON
	DISABLE	5 = OFF	6 = OFF


GENERAL - HARD DRIVES

	650-MB*	320-MB	300-MB*
LED Indicators
(read/write)	Green	Green	Green
Formatted Capacity	651.3	325.0	315.3
Drives Supported	Two*	Three	Two*
Drive Height	Full	Half	Full
Drive Size (in)	5 1/4	5 1/4	5 1/4
Drive Types(s)	49, 41	28	38
Controller	15-MHz ESDI	15-MHz ESDI	15-MHz ESDI
Transfer Rate (bits/sec)	15 M	15 M	10 M
Sector Interleave	1:1	1:1	1:1
Access Times (including settling):
Track-to-Track (ms)	5	5	5
Average (ms)	<18	<18	<18
Sectors Per Track	40	40	40
Physical Configuration
Cylinders	1632	1744	1222
Heads	15	7	15
Sectors Per Track	52	52	34
Bytes per Sector	512/512	512	512
Logical Configuration
Cylinders	816/1631	872	611
Heads	30/15	14	16
Sectors Per Track	52/52	52	63
Bytes Per Sector	512/512	512	512
	210-MB	120-MB
LED Indicators
(read/write)	Green	Green
Formatted Capacity	212.6	121.4
Drives Supported	Four	Four
Drive Height	Half	Half
Drive Size (in)	5 1/4	5 1/4
Drive Types(s)	51	50
Controller	Integrated	Integrated
Transfer Rate
(bits/sec)	12 M	12 M
Sector Interleave	1:1	1:1
Access Times
(including settling):
Track-to-Track (ms)	5	5
Average (ms)	<19	<19
Sectors Per Track	35	35
Physical Configuration
Cylinders	1366	1520
Heads	8	4
Sectors Per Track	38	39
Bytes per Sector	512	512
Logical Configuration
Cylinders	683	760
Heads	16	8
Sectors Per Track	38	39
Bytes Per Sector	512	512

* - This drive is obsolete

Fixed Disk Drive Arrays (two supported  120 MB          210 MB

 > Spindle Synchronization

 > Formatted Capacity/Drive Array:

        - Standard                      242.1 MB        424.7 MB

        - With Data Guarding            N/A             N/A

        - With Mirroring                121.56 MB       212.6 MB

 > Drive Array Pair Height              Half            Half

 > Drive Array Pair Size

   (in inches with drive frame)         5 1/4           Half

 > Controller (optional)                32-Bit IDA      32-Bit IDA

 > Array Transfer Rate (bits/sec)       20 MB           24 M


GENERAL - CONTROLLERS

Tape Adapter (000774)

 > Controls the 150-/250-MB Tape Drive

 > Plugs directly into an 8-bit expansion slot

 > Provides an 8-position switch for setting options

   and configuration

32-Bit IDA Controller

 > Processor                    16-MHz 80186

 > Command List Buffer          256-Kbyte, 80-ns static RAM

 > Data Transfer Buffer         128-Kbyte, 30-ns static RAM

 > Drives Supported             Up to eight

 > Simultaneous Drive Transfer

   Channels                     Four

 > Reliability Feature:

   - Data Guarding

   - Drive Mirroring

   - Controller Duplexing

SCSI Option Adapter

 > The SCSI Option Adapter board is a 16-bit expansion board

  containing the tape adapter electronics, adapter firmware,

  connectors for attachment to internal and external SCSI

  devices, and connectors for installation of future optional

  adapter modules.

15-MHz ESDI Controller

 > The 15-MHz ESDI nonintegrated fixed disk drive controller is

  compatible with the 15-MHz ESDI standard that specifies signals,

  connectors, and command protocols.

32-Bit DualSpeed Token Ring Controller

 > 32-Bit Bus Master Data Transfers

 > 16- and 4-megabit per second media transfer rates

 > Optimized drivers for NetWare and LAN Manager

 > Compatible with existing Token Ring environments

 > Shielded and unshielded swisted pair connections

 > EISA configuration - no switches or jumper settings

Enhanced 32-Bit DualSpeed Token Ring Controller

 > This board was a revision of the 32-Bit Token Ring

   Controller and resolved some compatiblity issues.

   Performance and features remained the same.

Advanced ESDI Controller

 > 16-Bit ISA controller

 > DMA transfers when installed in an EISA system

Integrated Diskette/Fixed/Tape Controller

 > Incorporates a Read-Ahead Buffer to speed access

 > Controls up to two diskette drives, one tape drive and two hard drives

Integrated Video Controller (standard)

 > VGA, EGA, CGA, and MDA resolution compatibility

 > 256 colors displayable from a palette of more tha 256,000.

QVision 1024/E Video Graphics System (optional)

 > SVGA and VGA resolution compatibility

 > Non-interlaced at all resolutions

 > 132-column support

 > 1-MB VRAM (ujpgradable to 2-MB in versions after 7-12-93)

 > 256 colors displayable at 1024 x 768; 65,000 colors at

   800 x 600 and 640 x 480 resolution


GENERAL - ROMS

The ROM BIOS chips are mounted on the system board with the ODD chip in

socket U115; the EVEN chip in socket U131.


GENERAL - TAPE DRIVES

Up to two tape drive are supported (depending on size).  The supported

tape drive specifications are:

	320-/525-MB	150-/250-MB
LED Indicators	Green	Green
Drives Supported	Two	One
Drive Height	Half	Half
Approximate Operating Times:
Backup (MB/min)	11	5
Restore (MB/min)	11	5
Format Blank Cartridge	Not Required	Not Required
Maximum Formatted Capacities:
Per Tape	320.0/525.0 MB	150.0/250.0 MB
Per Track	12.3/20.2 MB	7.5/12.5 MB
Per Data Block	1024 bytes	512 bytes
Mechanical Measurements:
Tape Width	.25 in	.25 in
Tape Length	620/1020 ft	620/1020 ft
Tape Speed:
Read/Write (both directions)	120 ips	72 ips
Rewind/Fast Forward	120 ips	90 ips
Per Frame	29 blocks	16 blocks
Track Pattern:	Serpentine	Serpentine
Number of Tracks	26	18
Number of Blocks Per Track	859/1413	16,276/27,126
Number of Data Sectors
per block	14	N/A
Percentage of ECC	12.5	6.25
Recording Density/Inch	16,000bpi	10,000bpi
Flux Reversals/Inch            20,000ftpi	12,500ftpi
Track Density/Inch	111	76
Data Encoding Method	4.5 CGR	4.5 GCR
Data Transfer Rate (bps)	1920	720
Error Detection/Correction	Reed Solomon	Reed Solomon

Tape Cartridge:

Read/Write	QIC320 DC6320	3M6150/3M6250
	DC6525	QIC150
Read	QIC320,150,	QIC24,QIC120
	120,64 DC6525/	6320/6250/6150
	600XTD
Host Adapter	SCSI Option	Tape Host
	Adapter Board	Adapter
	80-/120-MB	80-/120-MB^
Spare Part Number	122087-001	131337-001
LED Indicators	Green	Green
Drives Supported	Two	Two
Drive Height	Third	Third or Half+
Approximate Operating Times:
Backup (MB/min)	2.5	5.0 - 10.0
Restore (MB/min)	2.5	5.0 - 10.0
Format Blank Cartridge	117/170 secs	117/170 secs
Track Pattern:	Serpentine	Serpentine
Number of Tracks	32	32
Number of Blocks Per Track	86/130	86/130
Number of Data Sectors
per block	32	32
Percentage of ECC	9.38	9.38
Data Encoding Method	MFM	MFM
Data Transfer Rate (Kbps)	500, 1000	500, 1000
Tape Cartridge
80-MB	DC2080	DC2080
120-MB	DC2120	DC2120

^ The data compression feature of EzTape ver 2.22 or later (included) can increase the capacity to as much as 240 megabytes per cartridge.

+ This 80-/120-MB Tape Drive comes standard in half height configuration but can be converted to third height by switching the tape drive side  rails and rotating them 180 degrees.  Removal of the attached blank bezel (affixed to the drive bezel by two clips) completes the conversion.  The Tape Drive can then be installed in the "B" drive position in the small form factor desktops, such as the Deskpro 386/25e.

1.3-/2.0 GB DAT DRIVE

Dimension

 Height                         Half

Approximate Operating Times (MB/m):

 Back Up                        11

 Restore                        11

 Format Blank Cartridge         N/R

        Track Density                   1869 TPI

Recording method                Helical scan

Error Detection/Correction      CRC/Reed Solomon

Bytes/Group                     126,632

Data Framex/Group               22

Density/Inch (bpi)              61,000

Flux Reversals/inch             76,250

Data Encoding Method            8-10 (0,3) RU, Group Code

Data Transfer Rate (bps)        183,000

Media                           QIC320, DC 6320, DC 6525*

                                QIC320/QIC150/QIC120/QIC64**

                                DC 6525/DC 6320, DC 6250/DC 6150**

                                DC 600XTD**

                                DDS DG-60M***

*   Read Only

**  Read/Write

*** Recommended


OPTION PART NUMBERS - TAPE DRIVES

DRIVES:

80-/120-MB w/compression	131251-001
150-/250-MB w/compression	131247-001
320-/525-MB	116573-001
1.3-/2.0-GB DAT	131162-001

TAPE CARTRIDGES:

80-MB	115212-001
120-MB	115212-002
150-MB	113192-001
250-MB	115212-003
320-MB	116570-001
525-MB	116571-001
1.3-GB DAT	131107-001
2.0-GB DAT	131107-002


OPTION PART NUMBERS - MEMORY

2-MB Single-Socket Memory Module - 80 ns        115144-001

8-MB Single-Socket Memory Module - 80 ns        116561-001

32-MB Dual-Socket Memory Module                 116568-001


OPTION PART NUMBERS - VIDEO

114438-001   Video Graphics Monochrome Monitor (Model 411)

143650-001   COMPAQ VGA Color Monitor (Model 470)

122917-001   Video Graphics Color Monitor (Model 420)

122918-001   Reduced Emissions Video Graphics Color Monitor (Model 420sc)

143800-001   COMPAQ SVGA Color Monitor (Model 471)

143800-003   Reduced Emissions SVGA Color Monitor (Model 472)

141546-001   COMPAQ 1024 Color Monitor (Model 461)

141564-001   COMPAQ 1024 Color Monitor (Model 460)

147250-001   COMPAQ 151 FS Color Monitor (Model 441,442)

147250-003   COMPAQ 151 FS Color Monitor (Model 443,444)

133560-001   QVision 150 Color Monitor (Model 440)

133510-001   QVision 170 Color Monitor (Model 450)

143350-001   QVision 200 Color Monitor (Model 480)

126657-001   QVision 1024/E Controller

139148-001   QVision 1280/E Controller


OPTION PART NUMBERS - SERIAL/PARALLEL BOARD

Serial/Parallel Interface Board                 108406-001


CONFIGURATION - MEMORY

Memory is configured using the EISA Configuration program.


SPARE PART NUMBER - IDA DRIVE BRACKETS

420-MB Drive Array Bracket          116785-001

240-MB Drive Array Bracket          116786-001

680/1.02-MB Drive Array Bracket  128180-001


FEATURES AND SPECIFICATION

CONTROLLERS

HARD DRIVES

ROMS

SYSTEM BOARDS

TAPE DRIVES


CONFIGURATION

HARD DRIVES

MEMORY

SERIAL/PARALLEL INTERFACE BOARD

SYSTEM BOARD

VIDEO


SPARE PART NUMBERS

CONTROLLERS

DISKETTE DRIVES

HARD DRIVES

SYSTEM BOARDS

ROMS

IDA DRIVE BRACKETS


OPTION PART NUMBERS

SERIAL/PARALLEL BOARD

VIDEO

TAPE DRIVES

MEMORY