The TI-89 is an advanced graphing calculator made by Texas
Instruments with the intended market of math and engineering college students.
It is a variation of the TI-92 and TI-92 Plus models; contained in a traditional
TI-8X style case, it uses a 10MHz variation of the Motorola MC68000 microprocessor.
It is fully compatible with the TI-92+ calculator, however the screen (LCD)
is smaller (160x100) and the unit is equipped with 512K of memory, a large
chunk of that is the flash rom. Three dimensional graphing, symbolic manipulation,
pretty print, and upgradable flash ROM make the TI-89 a truly superior
calculator.
TI-89 Hardware Specifications
Custom MC68000 10MHz processor.
2048 KB of RAM from $000000 to $1fffff (RAM after $3ffff
wraps around to $00000).
2048 KB of flash ROM from $200000 to $3fffff.
Memory mapped I/O from $600000 to $60001f.
160 by 100 dot memory mapped video beginning at $4c00.
8 by 7 keyboard matrix.
Keyboard independent ON key.
Programmable rate generator used to control auto interrupt
5 frequency.
Buffered link port control.
Assembly programming for the 89 is accomplished using a link, either by the TI-Graph Link and the Graph Link Software or by a homemade serial link and terminal software such as CAL. For compiling assembly level programs, the compiler of choice is A68k.
Visit the Texas Instruments
TI-89 site!
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