Tandy 1000HX

The Tandy 1000 HX was the bigger brother of the EX. It was mostly the same machine, but had a 3.5" floppy instead of a 5.25" one, and also had DOS 2.11 in ROM, which could be accessed by starting the computer with no bootable disk present. Like the EX, the clock speed of its 8088 CPU was increased to 7.16 MHz, providing a large performance benefit; it could clock down to 4.77 MHz for compatibility with older applications. (4.77 MHz was the speed of the 8088 in the IBM PC and PC/XT models and so was the de-facto standard speed for an 8088 in an IBM-compatible.)