The Tandy 1400FD was a Tandy 1400 Series computer, replacing the earlier 1400LT model. The 1400FD however had a very similar specification, with it's V-20 CPU, two 720K floppy drives, and 768KB RAM. The system ran Tandy MS-DOS 3.30 and Deskmate.
The machine was made mostly by Sanyo, with a Toshiba display panel.
The 1400HD version was identical except that it was fitted with a 20MB hard disk in lieu of one of the floppy drives.
Dimensions: 3.5 X 12.5 X 14.5 Weight: 12.8 lbs. Processor: NEC V-20 (8088 equivalent) CPU Speed: 8/4.77 MHz Switchable FCC Class: B, UL Listed Battery: 4.8V 4400 MAh(Nickel-Cadmium) # of Slots: (1) Modem slot MTBF: N/A Std. Memory: 768K Op. Sys: MS-DOS Max. Memory: 768K Video: Backlit LCD Mem Cache: No cache, RAMDISK Heat Output: N/A Power Supply: 15VDC 700 mA,4.8V 4400 MAh Std. Ports: AC Adapter Keyboard: Full Size 76 Keys Parallel Printer-(DB-25) Math Co.: 8087-2 Intel 8 MHz Serial-(DB-9) Floppy: (1) 720K 3.5" RGB Monitor-(DB-9) Environment: Operating: 41 to 95 F External Disk Drive(DB-37) Storage: -4 to 140 F External Keyboard(7-Pin) Humidity: 20 to 80 % CURRENT BIOS ROM Version: 01.08.00 Utilities Version: N/A AC Adapter: Input: 105-135 VAC 60Hz Output: 12VDC 1.2A Polarity: Center Positive
The BIOS configuration utility is accessed using <CTRL><ALT><INSERT>.
Accessories and Options
A number of accessories and options could be added:
- 8087-2 math coprocessor (not listed as a RadioShack part)
- Internal modem boards - 2400bps (cat # 25-3524) or 1200bps (cat # 25-3510)
- Internal 20MB hard disk (cat # 25-3516)
- Carry case (cat # 25-3511)
- Weltec External 5¼-inch floppy drive (cat # 900-2084)
The user guide noted,
CAUTION: Before installing or removing an optional board in your Tandy 1400 FD, turn off the system, and disconnect the AC adapter. Installing or removing a board with the power on can damage the option board as well as the main logic board.
If you wish to add a math coprocessor or hard disk drive kit, it must be installed by a qualified service technician.
Contrary to information in the Tandy 1400FD GW-BASIC Quick Reference Guide, only access communications channel 1 can be accessed using a BASIC program. Communications channel 2 cannot be used in BASIC.
Speaker volume can be adjusted with a variable resistor located on the right side of the computer near the power switch. Turning the resistor (using a cross-head screwdriver) clockwise increases the volume and counterclockwise decreases the volume.
- Tandy 1400FD PSUs
- Tandy 1400FD Pinouts
- Tandy 1400FD Battery
- Tandy 1400FD Video
- Tandy 1400FD Floppy Drives
- Tandy 1400FD Keyboard Reference
- Tandy 1400 Series Expansion Slots
- Service Manual for the very similar 1400LT
- Tandy 1400FD BIOS Image