Sharp CE-1500T - Turbocharge your PC-1500 / PC-2

Overview

The very popular Sharp PC-1500, also sold as TRS-80 PC-2 and later Sharp PC-1500A, were all equipped with a 2.66mHz ceramic oscillator which provided a 1.33mHz clock to the pocket computer. The CE-1500T is an add-in module that replaces the built-in ceramic oscillator and provides a programmatically activated ‘turbo’ clock speed of 2.0mHz. With a simple POKE &FFFF,0 you can seamlessly increase the processor speed to run your program faster. Another POKE $FFFE,0 and you are back to the original clock rate.

The module installation is invasive but reversible. It should only be attempted by persons adept with a soldering iron and comfortable tinkering with miniature vintage electronics. We have made every effort to provide clear installation instructions but there is a high likelihood there are other variations to the PCB layout we have not documented. Installation is done at your own risk.

A video of the installation process, and a manual, are available in the ‘Installation Video and Manual’ tab below, and it is highly recommended to view the video and read the manual before attempting installation.

What is in the kit?

Description	Quantity
CE-1500T PCB, assembled and tested	1
Color coded wire harness	1
Anti-static protective sheet	1
Sticker for back of PC-1500/PC-2	1