Compaq 486 - Page 43

| | | 08, 10, 20, 40, 80, ??
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| | | 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.
|||
| | ------------------------ Failed byte. Values are 0, 1.
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| -------------------------- Always 000.
|
----------------------------- Failed address. Values are 00 through 20.
0X = error in 1st megabyte
1X = error in 2nd megabyte
2X = error in 3rd megabyte
3X = error in 4th megabyte