Tandy 1000 SmartDrive

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The Tandy 1000 SmartDrive was an early XT architecture IDE hard drive interface built-in to the 1000 TL/2, TL/3, RL, and RLX models. Actually, the only difference between the original 1000 TL and the TL/2 was the SmartDrive interface. The drives were 3 and a half inch, half-height Western Digital hard disk drives. They were available in either 20 MB or 40 MB sizes. When the 1000 RSX came out, having a 16-bit bus, it used the AT-IDE standard. The legacy of these drives are this: not only was it the inspiration for the much later, after XT-IDE interface, it also was the beginning of hard disk drives fitting where once only 3 and a half inch floppy drives could go.