TRS-80 Pocket - That's a very small TRs-80 you have there
Also known as the PC-1 for some reason. Kinda odd little beast.
Evidently the exact same model as the Sharp PC-1211. Mine suffers
with the cloudy screen. Possibly can be fixed. Dunno.
The TRS 80 PC-1 by Tandy Radio Shack released in 1980
The built in language is a BASIC interpretor.
Has 57 keys inclusing a QWERTY type calculator
The CPU is a Sharp CMOS SC43177 and SC43178
Runs at 256 KHz. RAM is 1920 Bytes
Text has one line at 24 characters long. LCD
Needs four of those LR44 batteries [ see below ]
Hopefully you can see my message through the fog
That's 9 x 9
And that's the answer = 81
Someone reckons the screen can be fixed
The very wonderful TRS-80 Pocket Computer
Back in the case for you
If you can only see this CONTENT window
then click the image above for the full site