Conventional Memories

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Index

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T8500

(No longer manufactured) (8500)

General Information

Model number: PA5042U (FCC ID# CJ69XAE325)
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 Weitek 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
Video RAM: 256KB
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 system included: 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)

Environmental Specifications

1) Operating condition

Ambient temperature: 41 to 95 degrees F. 5 to 35 degrees C.
Relative Humidity: 20% to 80% non-condensing

2) Non-Operating condition

Ambient temperature: -4 to 131 degrees F. -20 to 55 degrees C.
Relative Humidity: 5% to 90% non-condensing

3.5" 100MB Hard Disk Drive

Conner Peripherials HDD: CP-3104 or CP-30104
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 (no longer manufactured)
PC-PA8313U 8MB memory module (no longer manufactured)
PC11-PA5355U Additional 100 MB Hard Drive (no longer manufactured)
PC-T24A 2400 bps Hayes compatible Toshiba expansion slot modem w/serial port (no longer manufactured)
PC-PA5467U ToshibaLAN 16 bit Ethernet card (no longer manufactured)
PC-PA5466U ToshibaLAN 8 bit Ethernet card (IBM/XT compatible 1/2 size card) (no longer manufactured)
PC-PA7225U 5.25" 360KB external FDD with 18VDC adapter
PC-PA722L TD80 external tape drive (no longer manufactured)
PR-PA2750U ExpressWriter 201 portable printer (no longer manufactured)
PC-SW004 Toshiba BASIC 3.30 (includes diskette and manual) (no longer manufactured)
PC-SW008 Toshiba MS-DOS 3.30 (no longer manufactured)
PC-SW007 Toshiba MS-DOS 4.01 (no longer manufactured)
PC-SW013 Toshiba MS-DOS 5.0 (no longer manufactured)
PC-SW015 Toshiba MS-DOS 5.0 (no longer manufactured)
PC-SW012 Toshiba MS OS/2 operating system 1.21 (no longer manufactured)

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)

System Memory Map

Same as T5200 (refer to that section)

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

Toshiba America Information Systems Inc. (" TAIS ") shall not be liable for damages of any kind for use of this information, Which is subject to change without notice. Copyright 1994, 1995 TAIS.