I have both the 1350A and 1351A. The main difference is the 1351A has
more memory, 8000 vectors VS 2000 vectors, and 64 files VS 32 files.
Presumably it uses 16K DRAMs, rather than the 4K ones used in the 1350.
Also, My 1350A only address 1000 x1000 resolution and
the 1351A 1020 X
Are you sure about that? I could have sworn the 1350 was 1024*1023
resolution (10 bits/axis, with 'all ones' as one particular coordinate
indicating that the 10 bits of other coordinate are a character code +
attiributes)
-tony