Little Laptop 6803 Computer

This is a small 6803-based computer in a laptop sized box with a surplus keyboard and a 40 character by 8 line LCD. It is not battery powered, and requires 110v. The CPU is Bipolar, not CMOS, so it draws too much current to easily make it battery powered.

Hardware Specifications: Motorola 6803 CPU (8-bit), 32K SRAM, 2 8K EPROMs, 6522 VIA, 8255 PPI, 128K battery-backed RAMdisk, DS-1202 Clock, 1 serial port, 48 key QWERTY Keyboard, 40-character 8-line LCD, 20 spare digital I/O lines, Piezo speaker.

The main board is wire-wrapped. An internal transformer and voltage regulator supply power. A voltage inverter supplies power to the LCD. The keyboard is from a Texas Instruments TI-99, and was modified by adding isolation diodes.

I designed and built it in 1994. I wrote a monitor program and a complete BIOS in assembly language, with a mini disassembler included. I started work on an operating system, with a command structure similar to MS-DOS. It had a few commands working, and RAMdisk I/O, and the beginnings of a file system for the RAMdisk. Unfortunately I haven't completed the software.

This information is here just for fun, and is not supported in any way.