"CoCo" was fans' affectionate name for the Tandy TRS-80 Color Computer. In 1980 it featured ROM BASIC, a Motorola 6809E processor and 4K of RAM; over time the architecture evolved to support the multi-tasking operating system OS9, a paged memory management unit and 512K of RAM.

A 20MB SCSI Hard disk option for the CoCo cost $1200, provoking Rainbow Magazine columnist Marty Goodman to opine that comparable IBM PC hard drives were only $400 - couldn't someone hook one up to the Color Computer?

I did!

The CoCo-XT was the first Burke & Burke product. Using a deceptively simple circuit of a few logic gates, it interfaced an IBM MFM or RLL hard disk controller to the Motorola 6809E bus. I included an OS9 device driver I'd written. The CoCo-XT sold for $70 and cut 60% off the cost of a hard disk system, empowering a generation of users and developers.

Here's a list of titles I developed and published at Burke & Burke

For OS9:

For Microsoft Disk Basic:

Each title included a user manual and one or more programs: the main program(s), an installer if needed, and supporting utility programs. About half of the programs were written in 6809 assembler, with the rest in pre-ANSI C.

From 1988 - 1994, Burke & Burke products sold worldwide by mail order, at Color Computer conventions, and through distributors across the US and in Australia. The typical retail price of a Burke & Burke software package was $24.95.

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