Compaq Portable 486 Compaq Portable 486c Personal Computer Maintenance and Ser - Page 43

unable to determine failed data bit., data bit 7

Get Compaq Portable 486 - Notebook PC PDF manuals and user guides View all Compaq Portable 486 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 43 highlights

| || 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. | || Failed byte. Values are 0, 1. || 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

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
| ||
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.
| ||
| | ------------------------ Failed byte. Values are 0, 1.
||
|
-------------------------- 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