General Information
Model number: T3100 10MB - PA8037U
T3100/20 20MB - PA8038U
Dimensions: 12.2"W x 3.1"H x 14.2"D
Weight: 15 lbs.
Voltage: 115 VAC (104-127 VAC), 1.5 A
230 VAC (207-253 VAC) 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
Number of keys: 81
Keyboard type: PC
Drives: One 720KB 3.5" floppy disk drive
One 10MB or one 20MB hard disk drive
Operating system: Toshiba MS-DOS 2.11 shipped with earlier models
Toshiba MS-DOS 3.2 shipped with later models
Software Compatibility
Compatible with software written for the IBM PC/XT/AT using CGA or
T3100/AT&T 6300 640 x 400 high resolution graphics mode
Interfaces
- RGB (CGA) color video port
- RS-232-C serial port
- Parallel printer/external diskette
- Numeric keypad port
- Toshiba proprietary memory slot
- Toshiba proprietary "A" form factor expansion slot
Display
Display type: Orange gas plasma
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 : JD-3812MOTO
Number of heads: 2
Number of cylinders: 612 plus 4 spaces
Average access time: 100ms
Recording method: MFM
TEST/TEST3 setup type: 1
3.5" 20MB Hard Disk Drive (T3100/20)
JVC : JD3824ROTO
Number of heads: 4
Number of cylinders: 612
Average access time: 78ms
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
Switch Setting Description
1 OFF American display font
ON North European display font
2 OFF 640K conventional RAM
ON 512K conventional RAM
3 OFF Internal Display Controller
ON External Display Controller
4 OFF Printer Port / FDD
ON Bidirectional parallel I/O
5 OFF Single dot low intensity,
Double dot hi intensity
ON Double dot low intensity,
Single dot hi intensity
6 OFF Serial port is COM1, internal modem is COM2
ON Serial port is COM2, internal modem is COM1
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,0040 B8 40 00 CD 10
Int 10
-or-
Mov AL,40 B0 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,0042 B8 42 00 CD 10
Int 10
-Then change 42 to 74.
Options and Extra Accessories
PC-PA7139U 1MB LIM-EMS 3.2 memory Card (Toshiba expansion slot)
PC3-PA7135E 2MB extended memory module
PC-PA7225U 5.25" 360KB external FDD with 18VDC adapter
PC-PA7310U Expansion chassis & cable (requires expansion
interface card)
PC-PA7313E Expansion interface card (Toshiba expansion slot)
PC-PA7367E Floppy Link to 5.25" desktop diskette drive
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-PA5462U ToshibaLAN 8/16 bit Ethernet card & external AC
adapter (no longer manufactured)
PC-PA8721E Fabric carrying case
PC-PA8722E Leather carrying case (no longer manufactured)
PR-PA2750U ExpressWriter 201 portable printer
PC-SW008 MS-DOS 3.30 (includes diskettes and manual)
PC-SW007 MS-DOS 4.01 (includes diskettes and manuals)
PC-SW004 Toshiba BASIC 3.30 (includes diskette and manual)
System Memory Map
Space
Address range (Kilobytes) Used For:
-----------------------------------------------------------
'000000' 640 System working
'09FFFF' memory (Conventional)
-----------------------------------------------------------
'0A0000' 96 Reserved for graphic
'0B7FFF' display buffer
-----------------------------------------------------------
'0B8000' 32 Video RAM
'0BFFFF'
-----------------------------------------------------------
'0C0000' 64 Reserved for hardware
'0DFFFF' on option boards
-----------------------------------------------------------
'0E0000' 64 Duplicated assignment
'0EFFFF' at 'FE0000'
-----------------------------------------------------------
'0F0000' 64 Duplicated assignment
'0FFFFF' at 'FF0000'
-----------------------------------------------------------
'100000' 15,232 Memory expandable
'FDFFFF' with memory card, or memory expansion
adapters in exp. box
-----------------------------------------------------------
'FE0000' 64 Reserved ROM
'FEFFFF'
-----------------------------------------------------------
'FF0000' 64 System ROM
'FFFFFF'
-----------------------------------------------------------
