General Information
Model number: PA5042U
Dimensions: CPU - 5.8"W x 16"D x 4.1"H
Keyboard - 18.5"W x 8.5"D x 2.2"H
Weight: 22 lbs.
Voltage: 115 VAC, 1.3A
220 VAC, 0.7A auto sensing
CPU: 80386-25; 80387-25 or Wetek 3167 coprocessor socket
RAM memory: 2MB (640KB conventional; 1.384MB LIM-EMS
4.0 or extended memory)
Memory Expandable up to 14MB with optional 2MB and 8MB
memory modules (Must have at least one 2MB memory module
installed to use 8MB memory module)
64K Cache Memory
Display adapter: VGA Display Controller
Resolution: 640 x 480
Number of keys: 101
Keyboard type: 101-key keyboard compatible
Drives: One 100MB hard disk drive, Second 100MB hard disk drive
optional
One 1.44MB 3.5" floppy disk drive
Features: Speaker Volume Control, Reset Switch, Key Power Switch
Operating systemd: Toshiba MS-DOS 4.01
Software Compatibility
Compatible with software written for the IBM PC/XT/AT
Interfaces
VGA color video port
2 RS-232-C serial ports
Parallel printer port
External diskette or tape drive port
SCSI port
3 Toshiba proprietary memory slots
3 full-length 16 bit IBM expansion slots, and 1 dual purpose half-length
expansion slot (IBM 8-bit or Toshiba "A" form factor slot)
3.5" 100MB Hard Disk Drive
Conner Peripherials HDD: CP-3104
Interface: IDE
Average access time: 25
Recording Method: 2-7 RLL
Soft Switches
1) Change Speed
Ctrl+Alt+PgDn 8Mhz CPU speed
Ctrl+Alt+PgUp 25Mhz CPU speed
Hardware Switches and Controls
1) Power on/off
Key lock located on front of computer
Power on/off switch located on back of computer
2) Reset
Located inside door on front of computer
3) Speaker volume control
Located inside door on front of computer
4) 8 DIP switch bank
Located inside door on front of computer
SW1 OFF IRQ4 to Toshiba slot ON IRQ4 to all IBM slots
SW2 OFF IRQ3 to Toshiba slot ON IRQ3 to all IBM slots
SW3 OFF Reserved (set to OFF) ON
SW4 OFF Enable internal video controller ON Disable internal
video controller
SW5 OFF PRT output only ON PRT Bidirectional
SW6 SW7 SERIAL 1 SERIAL 2
----------------------------------
OFF OFF COM1 COM2
OFF ON COM1 COM3
ON OFF COM2 COM1
ON ON COM2 COM3
SW8 OFF EXT-FDD DRIVE "B" ON EXT-FDD DRIVE "A"
Options & Extra Accessories
PC10-PA8304U 2MB memory module
PC-PA8313U 8MB memory module
PC11-PA5355U Additional 100 MB Hard Drive
PC-T24A 2400 bps Hayes compatible Toshiba expansion slot
modem w/serial port (no longer manufactured)
PC-PA5467U ToshibaLAN 16 bit Ethernet card
PC-PA5466U ToshibaLAN 8 bit Ethernet card (IBM/XT compatible
1/2 size card)
PC-PA7225U 5.25" 360KB external FDD with 18VDC adapter
PC-PA722L TD80 external tape drive
PR-PA2750U ExpressWriter 201 portable printer
PC-SW004 Toshiba BASIC 3.30 (includes diskette and manual)
PC-SW008 Toshiba MS-DOS 3.30 (includes diskettes and manual)
PC-SW007 Toshiba MS-DOS 4.01 (includes diskettes and manuals)
PC-SW013 Toshbia MS-DOS 5.0 (includes diskettes and manuals)
PC-SW012 Toshiba MS OS/2 operating system 1.21
System Memory Map
Same as T5200 (refer to that section)
Interrupts
Interrupt Level Assigned To:
NMI Memory Parity Error, I/O Channel Error
0 Timer
1 Keyboard
2 Interrupt Controller for levels 8 - 15
1 3 Secondary Communications (COM 2)
4 Primary Communications (COM 1)
5 Printer 2
6 Floppy Disk
7 Printer 1
8 Real Time Clock
9 Software Redirect to INT '0A'
2 10 (Reserved)
11 SCSI
12 Mouse
13 Math Coprocessor
14 Hard Disk
15 (Reserved)
I/O Port Assignment
Port Address
From / To Device / Function
-------------------------------------------------------
'000' / '01F' 82C37A : DMA Controller 1
'020' / '03F' 82C59A : Interrupt Controller 1
'040' / '05F' 82C54 : Timer
'060' / '06F' 8042/8742: Keyboard Controller
'070' / '07F' RTC & NMI
'080' / '09F' DMA Page Register
'0A0' / '0BF' 82C59A : Interrupt Controller 2
'0C0' / '0DF' 82C37A : DMA Controller 2
'0E0' / '0EF' Reserved
'0F0' / '0F7' NPX Error Reset
'0F8' / '1EF' (Reserved)
'1F0' / '1F7' HDC port
'200' / '207' (Reserved)
'208' LIM Set 0 Page Register
'209' / '217' (Reserved)
'218' LIM Set 1 Page Register
'219' / '257' (Reserved)
'258' LIM Set 5 Page Register
'259' / '267' (Reserved)
'268' LIM Set 6 Page Register
'279' / '2F7' (Reserved)
'2F8' / '2FF' SIO Port 2 or Toshiba modem
'300' / '337' SCSI adapter (MB89352)
'338' / '33F' SIO Port 3
'340' / '377' (Reserved)
'378' / '37F' Printer Port 1
'380' / '3AF' (Reserved)
'3B0' / '3DF' BGS/HRGS Ports
'3E0' / '3EF' (Reserved)
'3F0' / '3F7' FDC/FDD Interface
'3F8' / '3FF'' SIO Port (1, 2, Modem card
'X000' / 'X00F' For T8500 I/O card
'4010' / '401f' For T8500 I/O card
'40D0' / 40DF' For T8500 I/O card
'8010' / '801F' For T8500 I/O card
'8080' / '808F' System Control Register and Status
'80D0' / '80DF' 17-inch CRT
'C010' / 'C01F' T8500 System Control
'C0D0' / 'C0DF' For T8500 I/O card
'X020' / 'X03F' For T8500 I/O card
'X0A0' / ' X0CF' For T8500 I/O card
