This numeric code is in two parts:
The first two characters are the class code. The class code tells what part of the diagnostic program found the error.
The second four are the sub code. The sub class code tells what the error was. In the case of a bad RAM chip, the sub class identifies the bad chip (this was very helpful to homegrown upgraders).
Class Code Sub Code
1=ROM test failed Meaningless
2=Memory test--bus subtest identifies bad chips
3=Memory test--byte write identifies bad chips
4=Memory test--Mod3 test identifies bad chips
5=Memory test--address uniqueness identifies bad chips
Single Chip Identification
Data Bit Location Sub Code Bits
0 F5 0001
1 F6 0002
2 F7 0004
3 F8 0008
4 F9 0010
5 F10 0020
6 F11 0040
7 F12 0080
8 G5 0100
9 G6 0200
10 G7 0400
11 G8 0800
12 G9 1000
13 G10 2000
14 G11 4000
15 G12 8000
Class Code Sub Code Sub Code Meaning
F=Exception 0001 Bus error
0002 Address error
0003 Illegal Instruction
0004 Zero divide
0005 Check instruction
0006 Traps instruction
0007 Privilege violation
0008 Trace
0009 Line 1010
000A Line 1111
000B Other exception
000C Nothing
000D NMI (normal indication)
0064 Couldn't read System File into memor
As far as i can understand, if think this is bad memory chip related.