This is a small text file detailing what we know about variable
storage on the TI-85. 

MSB=Most significant byte
LSB=Least significant byte


The variable headers (contains the name, type and address of the
variable) are stored in a downwards growing stack starting at $FA6F.
the actual variable data is stored in an upwards growing stack
starting at $8bf7.

the format of the variable headers is :
name of variable backwards (x bytes)
length of name of variable (1 byte)
position of variable in memory (2 bytes, MSB first)
type of variable (1 byte)

the variable types are as follows:
00    Real
01    Cplx
02    Vectr  03  Vectr complex
04    List   05  List  complex
06    Matrx  07  Matrx complex
08    Const  09  Const complex
0A    Equ
0B    Range
0C    Strng
0D-10 GDB
11    Pict
12    Prgm
13    Range

but these sometimes have some upper bits set (I haven't 
completely figured out what the upper bits do exactly)

The format of the actual variable data (pointed to by 
the address in the variable header) is:

length of data (2 bytes, LSB first) 
Data

[Please not that the next section may no
The length of data is only the actual length in bytes for 
EQU,RANGE,PIC,STRNG,PRGM and RANGE variables,
for other's it's number of entries, 
e.g. for real and complex single numbers, it's 1 
(actual length is 10bytes and 20 bytes respectivey)
for lists/vectors, it's the number of items in the list/vector
(actual length is 10*no of bytes if real or 20*no. of bytes if complex)

For matricies the length word is split into two byes and one bye is
the height and the other the width (not actually sure which way round
they go, though..) so the actual size is 1st byte*2nd byte*10 if real
or 1st byte*2nd byte*20 if complex.


Rob Taylor MAIL - mailto:rtaylor@rtaylor.u-net.com 
           WEB  - http://www.u-net.com/~rtaylor/