[Diy_efi] finding maps

[joe graham]

>Given an EPROM, what is the best method of finding the various maps hidden 
>therein?<

Do a disassembly and then shove that into excel.  Sort by pneumonic and pick 
all ldx ldaa ldab and ldy values.  Sort these by called value (#$xxxx, 
Lxxxx, etc...)  Convert the xxxx to decimal and subtract to find number of 
bytes between callouts.  Pick the largest ones and find them in the 
disassembly.  Look at the routine called for interpolating.  The largest 
tables should give you the 3-d routine and the 3-d routine will give you the 
location of all 3-d tables.  Repeat for 2-d interpolation. Use abx to find 
indexed tables.  Most tables should be near each other.

HTH

JG


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