Search results

I recently dug up my small collection of Pocket Computers and checked my 2 PC-2's and the Sharp PC-1500A. I have a rather complete selection with the Printer/Plotter, Cassette interface, RS-232 interface and a 4K, 8K and 16K ram module. After opening up the PC-1500 and one of the PC-2's I found...

Being a Tandy collector I recently ran into an IBM PC XT with 640Kb, full height 5 1/4" floppy and a full height 5 1/4" Miniscribe hard disk. The machine did start up but wouldn't boot from the HDD. I was able to enter ROM Basic. I don't have any PC-DOS or MS-DOS diskette lying around anymore so...

A small celebration today, on this day in 1977 Radio Shack introduced the TRS-80 to the public in the Warwick Hotel in NY. The first introduction was overseen by the press, largely by a bomb alarm in a nearby premise, but after a few days the word spread and Tandy was flooded with questions and...

I'm interested in several Model I ROM versions for a small article that will appear in a few weeks time. Doing my research I stumbled on the Level I ROM for the Model III that has been retrieved somewhere in 2009 by David Cooper (Marmotking). Does anyone know about this ROM and where I could...

I'm trying to debug a bootloader for a Model 4 OS that works fine in an emulator but not on the real hardware. That is to say, it does do what it is supposed to do but I can't get the display right. The message "Loader version 0.3" is displayed in the middle of the screen, approximately on row...

A few months ago I received a slightly battered Model 1 with a lot of satellite boards and modifications (lowercase, Level II board, new character generator, connector for external keyboard) and also an satellite board with four chips and two switches from "Mumford Micro" (a company still in...

All, I got this modified M1 and I tried to bring it back to life and remove some of the odd modifications such as an connector for an external keyboard. One modification is still in place which is a new character rom. The M1 boots but then shows two errors: - many characters are replaced by a...

I have a M4P and a M4, both are 64k machines. For a special project I need one of them to be 128k, preferably the M4. As far as I know both of them are Non-GA's but I'm not quite sure if this differs, and how to be 100% sure. What is needed to do the upgrade, apart from the 4164 chips? Bart

(English) Dutch TRS-80 User Group - archive online and new website. The Dutch TRS-80 User Group has been established on 1 October 1978 to support the new Home Computer from Tandy, the TRS-80. The User Group made a quick start and grew to over 4000 members. It published a bi-monthly newsletter...

I created a small bootable kernel for my M4P with SDCC which I managed to squeeze in an empty JV3-file. It works fine on an emulator (SDLTRS on my Mac) and now I want to move it over to my 'real' M4P. I have a FreHD but since my JV3 obviously has no file system I can't use DSK/DCT. Also I don't...

The Personal Computer That Beat Apple (For a While) Bart

My Model I has been enhanced with a FreHD which works like a charm. However, I have one problem that makes it difficult to fully utilize it: I can't store the configuration with SYSGEN and reboot directly with my virtual hard-drives available, since after using SYSGEN (or better: SYSTEM...

Being pretty new on the Apple II front I was on the outlook for a Super Serial Card. I found one advertised but looking at the pictures this is certainly not a Super Serial!! Anyone an idea of what it might be? Looks like a sort of drive but definitely not an Apple II one like I already own...