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Text File  |  1994-02-22  |  3KB  |  51 lines
  1. Description of cable for Rainbow, with hard-disk controller, to disk.
  2.  
  3. Retyped from Rainbow Technical Manual, Part Number EK-RB100-TM-001
  4.         First edition December 1984.
  5.  
  6. "Diagram shows cable, P/N 17-00427-01, with, from left to right,
  7. the wider disk-end edge connector, Labelled P2, then the narrower edge-
  8. connector, P3, and then the controller card end, P1.
  9.  
  10. Numbering is based on, top left=1, bottom left=2."
  11.  
  12.  
  13. From    Signal Name             Mnemonic                To
  14. ----------------------------------------------------------------------
  15. P1-1    Reduce Write Current    RWC L                   P2-2
  16. P1-2    Ground                  GND                     P2-1
  17. P1-3    Head Select 2           HD SEL 2 L              P2-4
  18. P1-4    Ground                  GND                     P2-3
  19. P1-5    Write Gate              WR GATE L               P2-6
  20. P1-6    Ground                  GND                     P2-5
  21. P1-7    Seek Complete           SEEK COMPLETE L         P2-8
  22. P1-8    Ground                  GND                     P2-7
  23. P1-9    Track 000               TK 000 L                P2-10
  24. P1-10   Ground                  GND                     P2-9
  25. P1-11   Write Fault             WRITE FAULT L           P2-12
  26. P1-12   Ground                  GND                     P2-11
  27. P1-13   Head Select 0           HD SEL 0 L              P2-14
  28. P1-14   Ground                  GND                     P2-13
  29. P1-15   Direction In            DIR L                   P2-34
  30. P1-16   Ground                  GND                     P2-33
  31. P1-17   Head Select 1           HD SEL 1 L              P2-18
  32. P1-18   Ground                  GND                     P2-17
  33. P1-19   Index Pulse             INDEX L                 P2-20
  34. P1-20   Ground                  GND                     P2-19
  35. P1-21   Ready                   READY L                 P2-22
  36. P1-22   Ground                  GND                     P2-21
  37. P1-23   Step Pulse              STEP L                  P2-24
  38. P1-24   Ground                  GND                     P2-23
  39. P1-25   Drive Select 0          DRV SEL 0 L             P2-26
  40. P1-26   Ground                  GND                     P2-25
  41. P1-27   -MFM Write Data 0       MFM WRITE DATA 0 L      P3-14
  42. P1-28   +MFM Write Data 0       MFM WRITE DATA 0 H      P3-13
  43. P1-29   -MFM Read  Data 0       MFM READ DATA 0 L       P3-18
  44. P1-30   +MFM Read  Data 0       MFM READ DATA 0 H       P3-17
  45.  
  46.  
  47. P1 - There are no wires to pins 31-34. Note wires in twisted pairs:-
  48.         1 and 2, 2 and 3, etc.
  49. P2 - Pins 15,16,27-32, have no wires.
  50. P3 - Pins 1-12,15,16,19 and 20 have no wires.
  51.