Here is where I'd start looking. On Startup the SPACE is written to the Display to CLEAR it.
SPACE = 0x20 = 0010 0000
09 Displayed and repeated, which is 0x30 0x39
Code:
0x20 0010 0000
0x30 0011 0000
^
Which is Bit 4 or Ram IC 04 (Starting from Right to left RAMIC{0..7})
0x20 0010 0000
0x39 0011 1001
^ ^ ^
Which is Bit 0, Bit 3, and Bit 4 or Ram IC's 0,3 & 4 (Starting from Right to left RAMIC{0..7})
You might try carefully removing those RAM IC's and Re-Inserting them in the IC Sockets.
If you get the same results, try replacing them, or maybe swapping Ram IC 4 with RAM IC 1,
in which case you will likely get 0x2B = +
+++++++++++++++++++++++
+++++++++++++++++++++++
Do you have Private Messages turned OFF? I can't PM you???
Larry