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Text File  |  2010-08-07  |  8KB  |  120 lines
  1.  
  2. USER PORT                           STD. DTE                    OPT. DCE
  3.                          CABLE                       CABLE
  4.  
  5.    |                  +------\         |                            |
  6.    |                2 |       \  3     |                            |
  7. M -|------------------|  U1-A  O-------|- 2   TX          ----------|- 3  RX
  8.    |                  |       /        |                            |
  9.    |                  +------/         |                            |
  10.    |    \                              |                            |
  11.    |   |  \                            |                            |
  12.    |  3|    \  4     4+------\         |                            |
  13. D -|---|U3-B O----+---|       \ 6      |                            |
  14.    |   |    /     |  5|  U1-B  O-------|- 4   RTS         ----------|- 5  CTS
  15.    |   |  /       +---|       /        |                            |
  16.    |    /             +------/         |                            |
  17.    |                                   |                            |
  18.    |    \                              |                            |
  19.    |   |  \                            |                            |
  20.    |  5|    \  6     9+------\         |                            |
  21. E -|---|U3-C O----+---|       \ 8      |                            |
  22.    |   |    /     | 10|  U1-C  O-------|- 20  DTR         ------+---|- 6  DSR
  23.    |   |  /       +---|       /        |                        |   |
  24.    |    /             +------/         |                        |   |
  25.    |                                   |                        |   |
  26.    |                                   |                        |   |
  27.    |                      /            |                        |   |
  28. B -|---+                /  |           |                        |   |
  29.    |   |           3  /    | 1         |                        |   |
  30. C -|-----------------O U2-A -----------|- 3   RX          ------|---|- 2  TX
  31.    |                  \    |           |                        |   |
  32.    |                    \  |           |                        |   |
  33.    |                      \            |                        |   |
  34.    |                                   |                        |   |
  35.    |                                   |                        |   |
  36.    |                                   |                        |   |
  37.    |         /            /            |                        |   |
  38.    |       /  |         /  |           |                        |   |
  39.    | 10  /    |11  6  /    | 4         |                        |   |
  40. L -|----O U3-E ------O U2-B -----------|- 6   DSR         ---+  +---|- 8  DCD
  41.    |     \    |       \    |           |                     |      |
  42.    |       \  |         \  |           |                     |      |
  43.    |         \            \            |                     |      |
  44.    |                                   |                     |      |
  45.    |                                   |                     |      |
  46.    |         /            /            |                     |      |
  47.    |       /  |         /  |           |                     |      |
  48.    | 12  /    |13  8  /    | 10        |                     |      |
  49. K -|----O U3-F ------O U2-C -----------|- 5   CTS         ---|------|- 4  RTS
  50.    |     \    |       \    |           |                     |      |
  51.    |       \  |         \  |           |                     |      |
  52.    |         \            \            |                     |      |
  53.    |                                   |                     |      |
  54.    |                                   |                     |      |
  55.    |         /            /            |                     |      |
  56.    |       /  |         /  |           |                     |      |
  57.    |  8  /    | 9 11  /    | 13        |                     |      |
  58. H -|----O U3-D ------O U2-D -----------|- 8   DCD         ---+------|- 20 DTR
  59.    |     \    |       \    |           |                            |
  60.    |       \  |         \  |           |                            |
  61.    |         \            \            |                            |
  62.    |                                   |                            |
  63.    |                                   |                            |
  64. N -|-----------------------------------|- 7    SIG GND    ----------|- 7 
  65.    |                                   |                            |
  66.    |  +5V                              |                            |
  67. 2 -|----+------------+          +------|- 1 PROTECTIVE GND  --------|- 1 
  68.    |    |            |          |      |                            |
  69.    |    |            |          |      |                            |
  70.    |  --+-- 0.1uF    |       -------   |                            |
  71.    |  --+-- 10V      |         ---     |                            |
  72.    |    |            |          -      |   *********************************
  73. A -|----+            |                 |   *                               *
  74.    |    |            |                 |   *    U-1    1488   RS-232 XMTR  *
  75.    | -------         | 14 +----+ 7     |   *                               *
  76.    |   ---           +----| U2 |--+    |   *    U-2    1489   RS-232 RCVR  *
  77.    |    -            |    +----+  \    |   *                               *
  78.    |                 |            \    |   *    U-3    7404   HEX INVERTER *
  79.    |                 | 14 +----+ 7\    |   *                               *
  80.    |                 +----| U3 |--+    |   *    DIODES  SIGNAL DIODES      *
  81.    |    |\  |             +----+  |    |   *            WILL WORK HERE     *
  82.    |    |  \|                     |    |   *                               *
  83. 10-|----|   |---+--------+        |    |   *    NOTE: THE RS-232 VOLTAGE   *
  84.    |    |  /| + |        |     ------- |   *          BE APPX +/- 10 VOLTS *
  85.    |    |/  | --+--      |       ---   |   *          WHICH IS OK TO USE   *
  86.    |   100uF  --+--   14 |        -    |   *          PER RS-232 STANDARD  *
  87.    |   15V      |     +--|--+          |   *                               *
  88.    |            |     |     | 7        |   *                               *
  89.    |         -------  | U1  +----+     |   *********************************
  90.    |           ---    |     |    |     |
  91.    |            -     +--|--+    |     |
  92.    |                   1 |    -------  |
  93.    |                     |      ---    |
  94.    | 120uF               |       -     |
  95.    | 15V        |  /|    |             |   *********************************
  96.    | +||        |/  |    |             |   *                               *
  97. 11-|--||----+---|   |----+----+        |   * Commodore User Port to RS-232 *
  98.    |  ||    |   |\  |         |        |   * Adaptor designed by Stephen   *
  99.    |        |   |  \|         |        |   * Coan, Version 2, 03-NOV-83.   *
  100.    |        |                 |        |   *                               *
  101.    |    --------    100uF  ---+---     |   * This general design has also  *
  102.    |     \    /     15V    ---+---     |   * been used in other devices    *
  103.    |       \/               + |        |   * where a negative voltage was  *
  104.    |    --------              |        |   * not available for the RS-232  *
  105.    |       |                  |        |   *                               *
  106.    |       |                  |        |   * NOTE:  The DTE is usually a   *
  107.    |       +-------+----------+        |   * male pin DB-25 connector and  *
  108.    |               |                   |   * the DCE is usually a female   *
  109.    |               |                   |   * DB-25 connector. Overlay the  *
  110.    |            -------                |   * DCE over the DTE to see the   *
  111.                   ---                  |   * connection scheme for DCE     *
  112.                    -                   |   * usage.                        *
  113.                                        |   *                               *
  114.                                        |   *********************************
  115.                                        |  
  116.                                        | 
  117.  
  118.                                                                                     
  119.  
  120.