TI-85
The TI-85 is a graphing calculator released by Texas Instruments in 1992 . It was the first computer with a link port, with which it is possible to exchange data between two computers or with one PC.
The TI-85 has a BASIC -like programming language that supports both variables and strings. With the TI-85, thanks to a loophole, it was possible for the first time to run assembler programs on a pocket calculator . For this purpose, so-called shells (e.g. OS-85, ZShell) were developed by hobby programmers, which allowed the execution of self-programmed assembler programs. This was also interesting insofar as the Zilog Z80 was a microprocessor that was extremely widespread at the time and for which a large number of documentation and program collections were already available in assembly language.
The TI-85 has been replaced by the successor TI-86 , which has advantages such as larger storage capacity.
specification
- Processor: 6 MHz Zilog Z80
- Memory: 28 KiB RAM
- Resolution: 128 × 64 pixels, 21 × 8 characters
- Link port: serial, 9600 bit / s
- Programming languages: TI-BASIC, Z80 Assembly (ASM)
Web links
- Assembler programming on the TI-85 - translation from http://www.ticalc.org/basics/calculators/ti-85.html#9
- My little pocket calculator museum - by Martin Doppelbauer (German + English)
- TI-85 - ticalc.org (English) - Upgrades, including unofficial emulators