General Information
Model number: PA7042
Dimensions: 12.2" W x 2.6"H x 12"D
Weight: 10 lbs.
Voltage: Computer DC input - 9VDC, 1.1A (+ = core; - = shell)
AC adapter - 120VAC (108 - 132V) 60Hz 15W
Battery: Internal rechargeable NiCD battery pack
CPU: 80C86-2 (7.16/4.77 MHz)
RAM memory: Early models shipped with 256KB standard (conventional);
Later models shipped with 640KB standard (conventional)
Memory expandable up to 1.6MB when optional 1MB LIM-EMS
(3.2) memory card added
Number of keys: 81
Keyboard type: PC
Drives: Two 720KB 3.5" floppy disk drives
Operating system: Toshiba MS-DOS 2.11 shipped with early models
Toshiba MS-DOS 3.20 shipped with later models
Software Compatibility
Compatible with software written for the IBM PC/XT using a color graphics
adapter (CGA) display
Interfaces
RGB (CGA) color video port
Composite b&w monochrome video port
RS-232-C serial port
Parallel printer/external floppy drive port
Toshiba proprietary expansion slot - "A" form factor
Display
Display type: Reflective Supertwist LCD
Display area: 9.24" W x 4.2" H; 9.75" diagonal
Resolution: 640W x 200H
Viewing angle: -15 to 40 degrees
Contrast: 4 : 1
Battery Life (Time until low battery LED)
Tests w/ 10% FDD access, Temperature 25 degrees C
SYSTEM | HDD | FDD | MODEM | Running Time
On | NA | On | NI | 7.5 Hours
"NI" means not installed
Soft Switches
1) Change CPU speed
Ctrl + Alt + PgUp 7.16 MHz CPU speed
Ctrl + Alt + PgDn 4.77 MHz CPU speed
2) Character font
Ctrl + Alt + Right arrow Toggles display font
3) Display select
Ctrl + Alt + End External display
Ctrl + Alt + Home LCD display
4) Keypad overlay
Ctrl + Alt + Backspace 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 is accessed as drive A; top
internal 3.5" FDD as drive B, bottom internal 3.5" drive is disabled.
- With switch set to "B", external FDD is accessed as drive B;
top internal 3.5" FDD as drive A, bottom internal 3.5" drive
is disabled.
- With switch set to "PRT", internal 3.5" FDDs are both operative -
top drive as A, bottom drive as B, and PRT port is operative
as a parallel printer port.
- Computer must be re-booted for switch change to take effect.
3) LCD contrast dial
- Located on left side of computer
4) Internal 6 bit dip switch
- Located internally on left side of computer, just above keys.
SW1 OFF not used (always Off)
Settings for System Memory
SW2 SW3
OFF OFF 640K System Memory
ON OFF 512K System Memory
OFF ON 384K System Memory
ON ON 256K System Memory
Setting for one or two internal floppy drives installed
SW4 OFF 2 FDD
ON 1 FDD
Settings for Serial port and/or modem Com port
SW5 ON Serial Port - Com 1. Modem - Com 2 (if installed)
OFF Serial Port - Com 2, Modem - Com 1 (if installed)
Settings for using internal display adapter or external video adapter
SW6 ON Internal Display Controller
OFF External Controller
Enhancements
1) 1/87 Supertwist LCD screen started shipping on T1100 Plus
2) 5/87 Supertwist LCD screen upgrade available
Options & Extra Accessories
PC-PA7139U 1MB LIM-EMS 3.2 memory card (Toshiba expansion slot)
PC2-PA7132U 384KB memory card for 256KB models only (no longer
manufactured)
PC-PA7225U 5.25" 360KB external FDD with 18VDC adapter
PC-PA7310U Expansion chassis & cable (requires expansion interface
card)
PC-PA7312ER T1100 Plus expansion interface card (Toshiba expansion
slot)
PC-PA7367E Floppy Link to 5.25 desktop diskette drive
PC-PA7438E 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)
PC-PA8701U 9VDC Universal AC adapter (replaces PC-PA7482U)
PC-PA7482U 9VDC AC adapter (no longer manufactured)
PC-PA7483U 9VDC automobile power adapter (no longer manufactured)
PC-PA7590E Fabric Carrying case (no longer manufactured)
PR-PA2750U ExpressWriter 201 portable printer
PC-SW008 Toshiba MS-DOS 3.30 (includes diskettes and manual)
PC-SW004 Toshiba BASIC 3.30 (includes diskette and manual)
System Memory Map
Start Address
Space
Decimal Hex (Kilobytes) Used For:
-------------------------------------------------------
0 00000
64K 10000
128K 20000 256 System working
192K 30000 memory
-------------------------------------------------------
256K 40000 Optional expansion
320K 50000 memory with
384K 60000 384 memory card, or
448K 70000 space for I/Os on I/O
512K 80000 expansion slot
576K 90000
-------------------------------------------------------
640K A0000 Space for I/Os on I/O
704K B0000 96 expansion slot
-------------------------------------------------------
736K B8000 16 Video RAM
-------------------------------------------------------
752K BC000 16 (Reserved)
-------------------------------------------------------
768K C0000
832K D0000 192 Space for I/Os on I/O
896K E0000 expansion slot
-------------------------------------------------------
960K F0000 32 (Reserved)
-------------------------------------------------------
992K F8000 32 System (BIOS) ROM
