2019


September 27 - 29, 2019

Springfield, OH

Speakers

Paul Schreiber

Texas, USA

Presentation Summary

"Mostly True Tales: Tandy’s Last Stand"

Description

Paul worked at Tandy R&D 4 separate times, beginning in 1977 and finishing up after the AST acquisition in 1993. He deigned over 40 products for not only Radio Shack, but also car stereos for Kenwood, Blaupunkt, and Alpine. Some projects were great successes (modems, DVMs) while others were not so much (VIS). Paul has a BSEE from Texas A&M and a MSEE from SMU, 13 patents, and now is semi-retired and enjoys restoring pinball games.

Paul Schreiber

"Mostly True Tales: Tandy’s Last Stand"

Ruud Broers

Eindoven, Netherlands

Presentation Summary

Custom Big Tandy ROM Development - Hardware and Software.

Description

"Since the last Tandy Assembly, I have been working on a custom ROM for my Model II. The code is stored in a 4KB EPROM for which I have created a break-out board. The custom ROM was designed in order to enable me to debug the 512KB RAM board I am working on. I just needed some diagnostic software that is available when nothing works.

The standard Model II ROM is 2KB in size, but address decoding supports 4KB. Only a small modification is needed to to run a 4KB EPROM. So, I decided to build a board that can hold two 4KB EPROMs and can be placed outside of the machine. Building the board was part of the learning curve to build the 512KB RAM board.

The code was built and tested using George Phillip's zmac cross assembler and trs80gp emulator along with a real Model II."

Ruud Broers

"Custom Big Tandy ROM Development"

Arno Puder

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

TRS-IO is a simple extension card that connects to the I/O bus of the TRS-80. A built-in WiFi and USB module allow TRS-IO to access resources on the Internet. Powered by a powerful micro-controller, TRS-IO combines the RetroStore, trs-nic, as well as FreHD, all in one extension card. The RetroStore component allows the TRS-80 to conveniently browse, download and run old favorite games for the TRS-80 similar to modern app stores. trs-nic adds networking capabilities and lets you access remote servers via TCP/IP from your TRS-80. FreHD is a popular hard disk emulator that is integrated in TRS-IO as well. This presentation will give a demo of TRS-IO as well explain some of its inner workings.

Arno Puder

"TRS-IO: Connecting the TRS-80 to the World!"

Herman Schnell and Thomas McLaren

Join Herman Schnell, an actual back-in-the-day Tandy 600 programmer, and Thomas McLaren, the Tandy 600 FAQ 3.0’s author, as they revive the Tandy 600’s development environment after three decades of dormancy. Learn how to program the 600 in assembly language. Explore newly discovered and surprising features hidden in the 600’s hardware and firmware. And, see how Herman fixed the 600’s serial port bug with a hardware hack. To be sure, these are exciting advancements for the practically forgotten portable that touched so few lives.

Herman Schnell and Thomas McLaren

"Tandy 600 Assembly Language Programming and Other Mysteries"