• The podcast TRS-80 Trash Talk # 28 is out now. In this episode, the Trash Talkers discuss how to buy and sell TRS-80s. Using their wealth of knowledge about the Tandy collector’s market they go in-depth on tips and techniques to use at live auctions, eBay, Craigslist and other marketplaces. Whether you’re buying, selling or doing both, you’re likely to learn quite a bit from their experience. You can download or listen at http://www.trs80trashtalk.com/.
After almost 5 (!) months, I have completed preparing a relevant (or as relevant as it can be) screenshot for every single entry in the Model 1/3/4 archive. That is over 17,000 screenshots. This entailed running every single program to make sure it worked; a task made difficult by the fact that different programs run on different models, and different DOS’s, and may even be a different version of BASIC (ZBASIC, NewBASIC, GBASIC, BASICG, SuperBasic, etc). It was a project long in the coming.
I would like to give a special shout-out to George Philips for tweaking his TRS80GP emulator to assist in this effort.
Along the way I have found out things like:
|•||Some Model I DOS’s toss the last line when reading a file saved in ASCII|
|•||TRSDOS and LDOS for the Model 4 are not simply the same OS|
|•||Model I TRSDOS does not support batch files|
|•||Model I LDOS requires a trailing slash when there’s no extension, making it largely incompatible with all multi-part programs|
|•||MultiDOS for the Model 4 has a special BASIC which can properly de-tokenize Model I/III BASIC|
|•||LDOS for the Model 4 has a special USR(11) function|
|•||There’s a whole class of software written for the Model III that can only run on a Model 4|
|•||Someone a lot smarter than I needs to figure out how the programs which POKE USR routines can possibly work in DOS|
|•||Model 4 Communication Programs usually need
|•||The LDOS command to set up a ramdrive in DCT format is
|•||/APP files are for PRO-WAM|
|•||Misosys catalog program names are not the same names used in the program (i.e, “Pro-Duce” is really “Misosys Disassembler”)|
|•||People LOVED to put their names on other people’s software (or remove the attribution lines)|
|•||TRS80GP can do everything that Dave Keil’s DOS emulator’s could, but without needing to run DOSBOX!|
Joe Rounceville has been designing and building peripherals for the Model I which he wants to share with everyone.
First is TRS80HDD. It is a way to run TRS-80 Model I disks from a SD card. Similar to a MISE but far less sophisticated. Schematics, instructions, and background can be found on his GitHub repository https://github.com/calphool/TRS80HDD. He advises that all parts are currently attainable at Mouser Electronics, the edge adapter from DigiKey, and the schematics can be sent to allpcb.com for creation of a PCB.
Second is TRS80GS. It is an expander for a TRS-80 Model that includes Texas Instruments video and audio chips to permit the Model I to do color graphics and have 6 tonal voices and 2 drum voices. It also supports Atari/Commodore joysticks. Schematics, instructions, and background can be found on his GitHub repository https://github.com/calphool/TRS80GS.
Thanks for keeping the TRS-80 alive, Joe!
A site visitor located in New Braunfels, Texas (central Texas, between Austin and San Antonio), has a bunch of magazines and original manuals to give away to a good home. Free for local pickup and he is willing to ship if you pay the cost of packing and shipping. I will relay messages sent to me in the order received. First come first served.
Kyle Wadsten has released his interface boards for the Model 3 and 4 that allow plugging in modern keyboards into the classic TRS-80 Model 3 & 4 machines.
There are two different board designs, one for USB keyboards and another for PS/2 input.
What I find very intriguing and helpful is the ability to use the existing keyboard along with a modern keyboard at the same time.
Check out more at his order page or on the Facebook announcement page at the links below:
Kyle Wadsten’s NEWKEY/80 Arduino and custom board allow for a modern keyboards on your Model 3 & IV machines.
Considering a Level 2 ROM upgrade but need a circuit board holder?
Luis Fernando Salazar posted on a TRS-80 Facebook group a link to his 3D-printed plastic mounts to hold L2 ROMs on thingiverse.com. He has a couple other printed replacement parts there too.
With access to these files and a 3D printer you too can create these parts.
• This Week in TRS-80 – December 3rd
• View here.
• Model III/4 contrast and brightness controls
• Orchestra 90 for the Model III/4
• Serial port for the Model I
• TRS8Bit – December 2018
• Download here.
• Travelling Mav – A review of TA 2018
• Christmas Wishes
• Mavs Workshop – Model I Power Supply
• Obituary – Paul Allen
• Pick 2
• The Great Snail Race – One Liner
• In Mav’s Workshop – Daisy Wheel Printers
• Flower Power – BASIC Program by George Philips
• In Mav’s Workshop – 2019 Developments
• Software Review – TBA (The BASIC Answer)
George and Peter Phillips have released trs80gp version 2.0.4.
* Model II emulation (and Model I, III and 4 as previously)
* Hires graphics support
* Floppy and Cassette emulation
* Software Keyboard
* Automatic keyboard input
* Turbo Mode
* Source-level debugging and many other programming features
It runs on Windows 10, 8, 7 and maybe even XP and Vista. Runs well under Wine on Mac and Linux
Learn more and get it at http://48k.ca/trs80gp.html