TANDY   MC-10

The Tandy MC 10 (MC means Micro Color) was designed on Motorola 6803 CPU on 0,89 MHz (the last chip in Motorola's 6800 line). It featured 8 KB ROM and 4 KB (upgradable to 16 KB) RAM.

DRAGON and TANDY Color Computer  II

The Dragon 32 (on the picture) was introduced at the end of 1982 as partialy compatible machine with Tandy Color Computer II. It uses unusual CPU, the 6809E. You could connect a cassette-recorder, a printer and a diskdrive to the computer. The Dragon 64 had a different case, the extended memory and a RS232-C-Interface built-in.

The Tandy / Radio Shack TRS-80 Color Computer (CoCo as it is known) was produced in several versions. The original CoCo was introduced in 1980. It was based upon a Motorola MC6809E microprocessor and featured 4 KB of RAM. The CoCo 2 (on the picture), introduced in 1983, was basically a refinement of the original. It was shipped in 16 KB and 64 KB RAM configurations and perhaps most notable is its ability to run OS9, a true real-time, multi-user, multitasking operating system. The Tandy CoCo 3, introduced in 1986, incorporated a number of significant improvements (the original clock speed was doubled, the CPU appropriately changed to a 68B09E, and a new video/memory-management chip was added).

TRS-80  MODEL  I

In contrast to the CoCo and Model 1000s (the PC clones), the real TRS-80 machines were all powered by the Zilog Z-80 microprocessor. The TRS-80 Model I was Radio Shack's first personal computer. It was developed in the late 1970's. The Model I was first made available with either 4 or 16 KB of RAM.

TRS-80  MODEL  III

The Model 3 was Tandy's second personal computer. One of the reasons it was developed, was because the FCC instituted regulations about the RF emissions generated by computers, and the Model I was completely unable to pass the emission restrictions.

TRS-80  MODEL  IV

The Model 4 had a 64 KB (or 128 KB) RAM and single-sided double density disks. The Model 4D was basically the same machine, but it came with double sided disk drives. The Model 4P was portable. Models 2, 16, 12, 16b, and 6000 (in order of release) were all "business" computers. The main difference between them and the others was in the use of 8-inch disk drives.