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pat8037

pat8037 2.3 KB
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  1. PAL16L8
    2. 

  2. PAT8037          **-1110-**          MK, 84-12-28
    3. 

  3. DS60 SASI INTERFACE CONTROL
    4. 

  4. 

  5. DMC MMG DIR A13 A07 ADS BRC HLC REQ GND
    6. 

  6. STB BRQ BWR BHE BLE CNT TRE DLY EXC VCC
    7. 

  7. 

  8. ;EQUATIONS:
    9. 

  9. 

  10. IF(VCC) /BRQ =  REQ*/BRC*/STB +
    11. 

  11.                 REQ* BRC* STB
    12. 

  12. 

  13. IF(VCC) /BWR = /DMC* DIR*/ADS +
    14. 

  14.                /MMG*/A13*/A07*/DIR*/ADS +
    15. 

  15.                 REQ* STB*/BRC*/DLY
    16. 

  16. 

  17. IF(VCC) /BHE = /DMC*/ADS +
    18. 

  18.                /MMG*/A13*/A07*/ADS +
    19. 

  19.                 REQ* STB*/HLC*/BRC*/DLY +
    20. 

  20.                 REQ*/STB*/HLC* BRC
    21. 

  21. 

  22. IF(VCC) /BLE = /DMC*/ADS +
    23. 

  23.                /MMG*/A13*/A07*/ADS +
    24. 

  24.                 REQ* STB* HLC*/BRC*/DLY +
    25. 

  25.                 REQ*/STB* HLC* BRC
    26. 

  26. 

  27. IF(VCC) /CNT = /DMC +
    28. 

  28.                /MMG*/A13*/A07 +
    29. 

  29.                 REQ* HLC* DLY
    30. 

  30. 

  31. IF(VCC) /TRE = /DMC*/ADS +
    32. 

  32.                /MMG*/A13*/A07*/ADS
    33. 

  33. 

  34. IF(VCC) /EXC =  REQ*/STB* BRC +
    35. 

  35.                 REQ* STB*/BRC
    36. 

  36. 

  37. FUNCTION TABLE:
    38. 

  38. 

  39. STB BRC MMG A13 A07 DIR ADS DMC HLC REQ DLY
    40. 

  40. BRQ BWR BHE BLE CNT TRE EXC
    41. 

  41. 

  42. ;SB MAA DA D HRD  B BBB CT E
    43. 

  43. ;TR M10 ID M LEL  R WHL NR X
    44. 

  44. ;BC G37 RS C CQY  Q REE TE C
    45. 

  45. -----------------------------
    46. 

  46.  XX XXX XX X XLX  H XXX XX H
    47. 

  47.  LL XXX XX X XHX  L XXX XX H
    48. 

  48.  LH XXX XX X XHX  H XXX XX L
    49. 

  49.  HL XXX XX X XHX  H XXX XX L
    50. 

  50.  HH XXX XX X XHX  L XXX XX H
    51. 

  51.  XX HXX XX H XLX  X HHH HH H
    52. 

  52.  XX LHX XH H XLX  X HHH HH H
    53. 

  53.  XX LLL HL H XLX  X HLL LL H
    54. 

  54.  XX LLL LL H XLX  X LLL LL H
    55. 

  55.  XX HXX HL L XXX  X LLL LL X
    56. 

  56.  XX HXX LL L XXX  X HLL LL X
    57. 

  57.  HL HXX XX H HHL  H LHL HH L
    58. 

  58.  HL HXX XX H LHL  H LLH HH L
    59. 

  59.  LH HXX XX H HHL  H HHL HH L
    60. 

  60.  LH HXX XX H LHL  H HLH HH L
    61. 

  61.  XX HXX XX H HHH  X HHX LH X
    62. 

  62. -----------------------------
    63. 

  63. 

  64. DESCRIPTION:
    65. 

  65. 

  66. INPUT SIGNALS:
    67. 

  67. 

  68. DMC - DMA CYCLE                    ACTIVE LOW
    69. 

  69. MMG - MASS MEMORY GROUP               "    "
    70. 

  70. DIR - DATA BUS DIRECTION OUT          "    "
    71. 

  71. A13, A07 - CPU ADDRESS BITS
    72. 

  72. ADS - ADDRESS STROBE                  "    "
    73. 

  73. BRC - BUFFER READY CONTROL FF
    74. 

  74. HLC - HIGH/LOW BYTE CONTROL FF
    75. 

  75. REQ - SASI REQUEST                    "   HIGH
    76. 

  76. STB - SASI TO BUFFER                  "    "
    77. 

  77. DLY - ACKNOWLEDGE DELAY               "    "
    78. 

  78. 

  79. OUTPUT SIGNALS:
    80. 

  80. 

  81. BRQ - BUFFER REQUESTS TRANSFER        "   LOW
    82. 

  82. BWR -   "    WRITE STROBE             "    "
    83. 

  83. BHE -   "    HIGH BYTE CE             "    "
    84. 

  84. BLE -   "    LOW  BYTE CE             "    "
    85. 

  85. CNT - ADVANCE BUFFER POINTER          "    "
    86. 

  86. TRE - BUS TRANSCEIVER ENABLE          "    "
    87. 

  87. EXC - EXECUTE CYCLE (REQUEST RESPOND) "    "
    88.