Model 1 released 1977 Z80 at 1.77MHz
Model 3 released 1980
CPU Z80 at 2MHz
RAM 16kB or 48kB
Text 64x16 (black & white)
Graphics 128x48 (black & white)
1 channel sound
Tape and 5.25" floppy discs
The TRS-80 range competed with the Commodore PET and the Apple II. The Model 1 came in two versions, the Level 1 (4k RAM and limited version of Basic) and the Level 2 (16k with extended Basic). Although mainly used for business, many machines were used as home computers.
TRS-80 Pocket Computer -PC1
1424 bytes of program memory
26 data memories (more can be used at the
expense of program memory)
24 digit alphanumeric LCD
Programmable in Basic
Optional interface for ticket printer and
A rebadged Sharp PC1211. The data memories
could be referred to as "A" to "Z", or as "A(1)"
to "A(26)". This can lead to some confusion. A program
10 FOR I=1 TO 10
30 NEXT I
Will loop forever, as "A(9)" is the
same as "I". So, "I" gets reset to 1 whenever the it
get to 9..