Conventional Memories

This page is part of my Toshiba Tech Access archive project, to learn more please visit the project page, Some of the files from the Toshiba BBS referenced here can also be found there.

Index

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T3100, T3100/20

(No longer manufactured) (3100)

General Information

Model number: T3100 - PA7037U (FCC ID# CJ69XAE231)

T3100/20 - PA7038U (FCC ID# CJ687NE240)
Dimensions: 12.2" W x 3.1"H x 14.2"D
Weight: 15 lbs.
Voltage: 115V (104 - 127V) 1.5A

230V (207 - 253V) switch selectable
Frequency: 50/60 Cycles (49 - 61 cycles)
CPU: 80286-8 (8/4.77MHz)
RAM memory: 640KB (Conventional)
  Memory expandable up to 3.6MB when optional 2MB extended and 1MB expanded memory cards are added
Video RAM: 32KB
Number of keys: 81
Keyboard type: PC
Drives: One 720KB 3.5" FDD

One 10MB or one 20MB hard disk drive
Operating system included: Toshiba MS-DOS 2.11 or 3.2

Software Compatibility

Compatible with software written for the IBM PC/XT/AT using CGA or T3100/AT&T 6300 640x400 high resolution graphics mode

Interfaces

RGB (CGA) color video port

RS-232-C serial port

Numeric keypad port

Parallel printer/external diskette or tape drive port

Toshiba proprietary memory slot

Toshiba proprietary "A" form factor expansion slot

Orange Gas Plasma Display

Display area: 7.5"W x 5.7"H; 9.5" diagonal
Resolution: 640 x 400
Contrast: 5 : 1

3.5" 10MB Hard Disk Drive (T3100)

JVC HDD: JD-3812MOTO
Number of heads: 2
Number of cylinders: 612 plus 4 spaces
Average access time: 100 ms
Recording method: MFM
TEST/TEST3 setup type: 1

3.5" 20MB Hard Disk Drive (T3100/20)

JVC HDD: JD3824ROTO
Number of heads: 4
Number of cylinders: 612
Average access time: 78 ms
Recording method: 2-7 RLL
TEST/TEST3 setup type: 2

Soft Switches

1) Change CPU speed

Ctrl + Alt + PgUp 8MHz CPU speed
Ctrl + Alt + PgDn 4.77MHz CPU speed

2) Display select

Ctrl + Alt + End External Display
Ctrl + Alt + Home Plasma Display

3) Keypad overlay

Alt + Numlock Toggles keypad overlay

Hardware Switches and Controls

1) Power on/off

Located on back of computer

2) A/B/PRT switch

Located on left side of computer

With switch set to "A", external FDD port is accessed as drive A; internal 3.5" FDD as drive B.

With switch set to "B", external FDD port is accessed as drive B; internal 3.5" FDD as drive A.

Switch is set to "PRT" for parallel printer output.

Computer must be re-booted for switch change to take effect.

3) 6 DIP Switch bank

Located on back of computer

Default from factory - all switches down

SW1 OFF American Font ON North European Font
SW2 OFF 640K ON 512K
SW3 OFF Internal Display Controller ON External Display Controller
SW4 OFF Prt/FDD ON PRT bidirectional
SW5 OFF Single dot - Low Intensity

Double dot - High Intensity

 ON Double dot - Low Intensity

Single dot - High Intensity
SW6 OFF Serial Port - Com 1

Modem - Com 2

 ON Serial Port - Com 2

Modem - Com 1

4) 110VAC or 220VAC

Move metal plate located on back of computer to appropriate voltage. Default setting in USA shows 115AC with 230AC covered by plate.

Toshiba High Resolution 640 x 400 mode

a) T3100 and T3100/20

To switch to 640 x 400 graphics mode use the following routine.

Mov AX,0074

Int 10

b) AT&T 6300 or Olivetti

Mapped just like the T3100 BIOS ROM font starts at FCA0:0000.

To look for the video call in a program driver installed as an AT&T 6300, look for:

Mov AX,0040B8 40 00 CD 10

Int 10

or

Mov AL,40B0 40 CD 10

Int 10

Then change 40 to 74.

c) Sigma Color 400

Mapped just like the T3100, but this is a 16 color monitor.

To look for the video call in a program driver installed as a Sigma Color 400, look for:

Mov AX,0042B8 42 00 CD 10

Int 10

Then change 42 to 74.

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 95% non-condensing

3) Acclimation

Needs no more than 60 min. warm up

Options and Extra Accessories

PC-PA7139U 1MB LIM-EMS 3.2 memory Card (Toshiba expansion slot) (no longer manufactured)
PC3-PA7135E 2MB extended memory module (no longer manufactured)
PC-PA7225U 5.25" 360KB external FDD with 18VDC adapter
PC-PA722L TD80 external tape drive (no longer manufactured)
PC-PA7310U Expansion chassis & cable (requires expansion interface card) (no longer manufactured)
PC-PA7313E Expansion interface card (Toshiba expansion slot) (no longer manufactured)
PC-PA7367E Floppy Link to 5.25" desktop diskette drive (no longer manufactured)
PC-PA7438EB 300/1200 bps Hayes compatible Toshiba exp. slot modem (no longer manufactured)
PC-T24A 2400 bps Hayes compatible Toshiba exp. slot modem w/serial port (no longer manufactured)
PC3-PA7353E 15-key numeric keypad (no longer manufactured)
PC-PA801L Statpower Prowatt 125 auto adapter
PC-PA5462U Toshiba LAN 8/16 bit Ethernet card & external AC adapter (no longer manufactured)
PC-PA8721E Fabric carrying case (no longer manufactured)
PC15-PA8020U Fabric carrying case (no longer manufactured)
PC-PA8722E Leather carrying case (no longer manufactured)
PR-PA2750U ExpressWriter 201 portable printer (no longer manufactured)
PC-SW008 Toshiba MS-DOS 3.30 (no longer manufactured)
PC-SW007 Toshiba MS-DOS 4.01 (no longer manufactured)
PC-SW004 Toshiba BASIC 3.30 (no longer manufactured)

System Memory Map

Address range Space (Kilobytes) Used For:
'000000'

'09FFFF'

 640 System working memory
'0A0000'

'0BFFFF'

 128 Reserved for graphic display buffer
'0C0000'

'0DFFFF'

 128 Reserved for ROM on option adapters
'0E0000'

'0EFFFF'

 64 Duplicated assignment at 'FE0000'
'0F0000'

'0FFFFF'

 64 Duplicated assignment at 'FF0000'
'100000'

'FDFFFF'

 15,232 Memory expandable with memory card, or memory expansion adapters in exp. box
'FE0000'

FEFFFF'

 64 Reserved ROM
'FF0000'

'FFFFFF'

 64 System ROM

Interrupts

Interrupt Level Assigned To:
-- NMI RAM parity error; I/O channel error
  0 Timer
  1 Keyboard
  2 Interrupt controller 2 for levels 8 to 15
1 3 Secondary Communications (COM 2)
  4 Primary Communications (COM 1)
  5 PRT 2
  6 FDC
  7 PRT 1
  8 RTC
  9 Software Redirect to INT '0A'
2 10 (Reserved)
  11 (Reserved)
  12 (Reserved)
  13 (Reserved)
  14 HDC
  15 (Reserved)

I/O Port Assignment

Port Address

From / To

Device / Function
'000' / '01F' 82C37 : DMA Controller 1
'020' / '03F' 82C59 : Interrupt Controller 1
'040' / '05F' 82C54 : Timer
'060' / '06F' 8042 : KBC
'070' / '07F' RTC and NMI
'080' / '09F' DMA Page Register
'0A0' / '0BF' 82C59 : Interrupt Controller 2
'0C0' / '0DF' 82C37 : DMA Controller 2
'0E0' / '1EF' (Reserved)
'1F0' / '1F8' HDC
'200' / '2D7' Game I/O
'278' / '27F' Parallel PRT 2
'2F8' / '2FF' Serial Port 2 (COM2)
'300' / '31F' Prototype card
'360' / '36F' (Reserved)
'378' / '37F' Parallel PRT 1
'380' / '38F' SDLC, Bisync 2
'3A0' / '3AF' Bisync 1
'3B0' / '3BF' MDA and PRT
'3C0' / '3CF' (Reserved)
'3D0' / '3DF' CGA
'3F0' / '3F7' FDC
'3F8' / '3FF' Serial Port 1 (COM1)

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.