Chapter 3.3 Memory Error Codes - Compaq SLT 386s/20 Maintenance And Service Manual

Chapter 3.3 MEMORY ERROR CODES

Memory error codes appear when the system detects a memory fault during the
Power On Self Test (201 or 203 error codes) or as a result of a diagnostic
test. The TEST programs attempt to isolate the memory fault to a specific
location, then generate a memory error code.
The memory error code points to a specific memory address.
location of the memory address depends on the number and type of memory boards
installed and the type of memory device used.
Memory error codes are displayed in an eight digit format (XX000Y ZZ).
and Y alphanumeric codes are like key identification points for defective
memory isolation.
XX000Y ZZ Error Message
| | | |
| | | |
| | | --------------------- Failed data bit.
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | ------------------------ Failed byte.
| |
| -------------------------- Always 000.
|
----------------------------- Failed address.
|-------- 201 (ROM)
08, 10, 20, 40, 80, ??
00 = parity bit
01 = data bit 0
02 = data bit 1
04 = data bit 2
08 = data bit 3
10 = data bit 4
20 = data bit 5
40 = data bit 6
80 = data bit 7
?? = unable to determine failed data bit.
0X = error in 1st megabyte
1X = error in 2nd megabyte
2X = error in 3rd megabyte
3X = error in 4th megabyte
The physical
Values are: 00, 01, 02, 04,
Values are 0, 1.
Values are 00 through FF.
The XX