LZ: Info about processor in Ti-85 required


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LZ: Info about processor in Ti-85 required



What kind of processor is used in the TI-85.  It is not a Zilog Z80, 
since it is made by Toshiba.  But it is at least compatible to a 
certain degree to the Z80.  Does the TI-85 processor support the full 
instruction set of the Z80?  Does it support any instructions that aren't 
in the Z80 instruction set?  


Also what is the word size of this processor? 8-bit?  


>From what I can recall the Z80 had memory refresh 
circuitry built into it, now it would be silly for TI to put dynamic 
ram in a calculator.  So is it implemented on this processor?  Is 
there an R register?  Is it safe to use it for other uses?


-----
Richard Gallagher
rbg@cvm.co.nz