Computer Closet Collection

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Texas Instruments 99/4A

See below for specifications and information on this system.

Key Dates:	Announced June, 1979 Ships November, 1979 Peripheral Expansion Box (PEB) announced January, 1982
Original Price:	$1500
CPU:	Texas Instruments TMS9900
Memory:	16K RAM, 26K ROM
Display:	32 characters by 24 lines text, 152x192 16 color graphics
Operating System:	ROM BASIC, assisted by Enhanced BASIC in a cartridge, and a disk management cartridge
Input/Output:	Built-in keyboard, cartridge port, expansion port for Peripheral Expansion Box (PEB), composite video monitor output
Bus:	Proprietary
Cards Installed in PEB:	32K RAM, floppy disk controller, serial port, flex cable interface
Other Items in Collection:	Peripheral Expansion Box, pair of joysticks, various cartridges
Items Needed:	Floppy disk software

Here's a shot of the Computer Closet's complete TI 99/4A system with Peripheral Expansion Box (PEB) with one 5 1/4" floppy disk drive, 32K RAM expansion, RS-232 card, Flex Cable Interface, and Disk Manager 2 cartridge.

Here's the TI 99/4A original color display box:

Texas Instruments Advertisements

Here are some classic advertisements from TI. Click a thumbnail to see a larger version of the picture.

	"Two Bytes Are Better Than One" in this silly ad for the TMS 9900 microprocessor circa May 1977.
	By late 1982, the IBM PC was out, the Apple II was king of the home market, and even Bill Cosby couldn't save the 99/4A system, despite the recent announcement of the Peripheral Expansion Box pictured here.

Texas Instruments 99/4A FAQ

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