CPU: Advanced Z-80A 8-Bit Processor (2.03 MHz) Kits were sold to double this to 4Mhz
RAM: 4K - 48K
ROM: 4K ROM (Level I) or 14K ROM (Model III BASIC - co copyrighted by Tandy and Microsoft)
Video Display: Memory mapped with high-resolution 12" Black and White Integrated Monitor. Includes scroll protect with 96 text characters, 64 graphics characters and 160 "special" characters. Screen format for Level I and Model III BASIC is 64 characters by 16 lines. Model III BASIC also provides 32 characters by 16 lines. Graphics are 128x48.
Keyboard: Full-size "typewriter' style, 65-key integral keyboard includes 12-key numeric pad for data entry plus repeating keys. Model III BASIC includes upper and lower case.
I/O: Cassette Tape Recorder (250 Baud for Level I; 500/1500 Baud for Level II)
Ports: Computer-controlled cassette inferface, Parallel Printer interface, internal 25 pin RS-232-C (Serial) Port, Buffered Bus for adding 2 Internal and 2 external double-density 5 1/4-inch disk drives.
Power: Integral power supply of 105-130VAC @ 60 Hz. U.L. lited.
Dimensions: 12-1/2 x 18-7/8 x 21-1/2"
Optional Expansions:
Internal (2) and External (2) 5.25" Floppy Drives holding 178K each
Optional Hi-Res Graphics Board
Compatibility: Substantial Compatibility with the Model I (main incompatibility: Port vs. Memory address)