Internal RAM layout:
      0 1 2 3 4 5 6 7 8 9 A B C D E F
0x00:|0|0|0|0|0|0|0|0|a|a|a|a|a|a|a|a|
0x10:|c|c|c|d|d|d|d|d|d|d| | | | | | |
0x20:|B|T|b|b|b|b|b|b|b|b|b|b|b|b|b|b|
0x30:|b|b|b|b|e|e|e|e|e|e|e|e|f|f|f|f|
0x40:|f|f|f|f|f|g|g|g|g|g|g|g|g|g|g|g|
0x50:|g|h|h|h|h|h|h|h|h|h|h|h|h|i|i|i|
0x60:|i|i|i|i|i|i|i|j|j|j|j|j|j|j|j|j|
0x70:|j|j|j|j|j|Q|Q|Q|Q|Q|Q|Q|S|S|S|S|
0x80:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0x90:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0xa0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0xb0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0xc0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0xd0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0xe0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0xf0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
0-3:Reg Banks, T:Bit regs, a-z:Data, B:Bits, Q:Overlay, I:iData, S:Stack, A:Absolute

16 bit mode initial stack starts at: 0x7c (sp set to 0x7b) with 132 bytes available.
The largest spare internal RAM space starts at 0x1a with 6 bytes available.

Other memory:
   Name             Start    End      Size     Max     
   ---------------- -------- -------- -------- --------
   PAGED EXT. RAM                         0      256   
   EXTERNAL RAM     0x0001   0x1aea    6890    16777216
   ROM/EPROM/FLASH  0x0000   0x1c72c  47034    16777216