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The Radio Shack Tandy TRS-80 Model 100 computer. It was considered one of the very first laptop or truly portable computer, with its size and weight. This computer introduced me to the world of dial-up communication and BBS services, and connecting with your friend a couple of blocks away and chatting on it.
It took some hunting, but I was able to find a unit that was fully-functional. I was able to enter and run a handful of programs. I plan on having the RAM checked and the the board re-capped as there has been some memory issues with some of the larger games and programs.
I have purchased and installed:
Dial-a-ROM (serves as a bank of various ROM images, including TS-DOS and others, that can be selected ROM software that can be selected using the rotary dial.
The "backpack" is an SD card based "hard drive" for the Model 100. It fits snug into the RS-232 serial port and can be accessed using TS-DOS. Much easier than downloading the programs and transferring them over a null-modem cable and specialized software on your host computer.
The "M10MEM", an 8KB SRAM Module that helps bring the memory of the TRS-80 Model 100 to a maximum total of 32K. Originally the unit had 24K.
These modules contain four 2Kx8 SMD SRAMs mounted on a ceramic substrate with a non standard DIP footprint. The M10MEM is a modern replacement for the memory modules using a single 8Kx8 SRAM.
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