Tandy Radio Shack - TRS-80 Model III - Various (TOSEC-v2006-06-07)

"As a follow-on to the Model I, in July 1980 Tandy released the Model III, a more integrated and much improved system. The improvements of the Model III included built-in lower case, a better keyboard, and a faster (2.03 MHz) Z-80 processor. With the introduction of the Model III, Model I production was eventually discontinued as the Model I systems did not comply with new FCC regulations regarding radio interference. In fact, the Model Is radiated so much RFI that many games were designed so that an AM radio next to the computer could be used to provide sounds.

The TRS-80 Model III also came with the option of integrated disk drives. Since they took power from the same supply as the motherboard and screen, which was not upgraded for the disk drive models, it was common to see the screen image shrink noticeably during drive access." (Wikipedia)

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