John Elliott IV

John worked almost 10 years at Tandy Research and Development, mostly on Tandy XENIX on their 68000-based computers. He was the kernel architect for the 68000/XENIX 3.1, 3.2, and 3.3 releases. After Tandy, John worked at the Santa Cruz Operation (aka SCO) for 4 years working with their XENIX and UNIX releases. Today, John is a software developer doing contract work for Microsoft’s Xbox team.

John will be presenting product announcements and demos for the 8" Tandy computers including a new 8MB 68000 memory board, a new Z-80 based 68000 memory diagnostic which supports up to 7.5MB of memory, and a new XENIX kernel designed to support modern hardware including automated kernel optimization of larger memory now available for Big Tandy computers.

Vernon Hester

After purchasing a Texas Instruments programmable slide-rule calculator SR-52 in 1975, Vernon realized that he could write programs much more efficiently than Texas Instruments. This programming efficiency continued with Z80 assembly code for the TRS-80 Model I. He has always strived for smaller, faster, and more accurate solutions.

The creator of MULTIDOS will talk about the history of this popular TRS-80 operating system from 1980 up to today, including development, problems and updates. If time permits he will also discuss double-precision division in SuperBASIC. i.e., restoring division (Microsoft - slowest), non-restoring division, SRT division, and Hester division (fastest).

Jeff Birt

History of Tandy pocket computers from PC-1 through PC-8. A look at the capabilities of these machines, the dates each was offered by Radio Shack and how they compare to the OEM versions. Accessories - What accessories were available from Radio Shack and/or third parties? How were these computers used back in the day? Super Rare! - What are some of the uncommon machines and accessories to find today: PC-1 with good original LCD, PC-2 RS-232 interface, PC-5, etc. Common problems with machines today take many forms - Battery corrosion, LCD failure, broken latch/hinge, PC-2 printer broken gears, dry pens, thermal printer paper on correct size roll. Modern accessories: Mass storage, RS-232, development tools, etc.

Arno Puder, Sascha Haeberling and Matt Boytim

Arno Puder grew up on a TRS-80 machine and is enjoying the ever-growing retro scene that brings back fond memories.

The RetroStore is a curated repository of vintage applications that allows the seamless download and execution from an emulator or a real machine. TRS-IO is a general purpose I/O card for the TRS-80 M1/III and among others provides access to the RetroStore. In this presentation we give an overview of the RetroStore's latest features and how TRS-IO can be used to migrate a machine state from an emulator to a real machine.