8›                         P1050 MODIFICATION   1050 SECTION    8-10-86        BY BOB WOOLLEY   75126,3446    ›››                                                                                                                                  ›       ---------------------------  THIS IS A 25 (OR 50) PIN FLAT CABLE FROM THE 1200XL TO THE 1050  -----------------            ›                                                                                                                                  ›       *   *   * *   *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *            ›       |   |   | |   |     |     |     |     |     |     |     |     |     |     |     |     |     |     |     |     |            ›       | +->--->->--->----->----->----->----->----->----->----->----->----->----->----->----->----->----->----->-----+-R2.2K-+    ›       | | |   | |   |     |     |     |     |     |     |     |     |     |     |     |     |     |     |     |             |    ›       | | +--->->--->----->----->----->----->----->----->----->----->----->----->----->----->----->----->----->---+---R2.2K-+    ›       | |     | |   |     |     |     |     |     |     |     |     |     |     |     |     |     |     |     |   |         |    ›       | |     | +--->----->----->----->----->----->----->----->----->----->----->----->----->----->----->---+->--->---R2.2K-+    ›       | |     |     |     |     |     |     |     |     |     |     |     |     |     |     |     |     |   | |   |         |    ›       | |     | +--->----->----->----->----->----->----->----->----->----->----->----->----->----->----->--->-+--->---R2.2K-+    ›       | |     | |   |     |     |     |     |     |     |     |     |     |     |     |     |     |     |   |     |         |    ›       | |   +-+ | +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   |     |         |    ›       | |   |   | |     |     |     |     |RST  |     |     |     |     |     |     |     |     |CLK2 |     |CS2  |      R/W|    ›       | |   |   | |     |     |     |     | *   |     |     |     |     |     |     |     |     | *   |     | *   |       * |    ›       | |   | +-+ |     |     | +-+ | +-+ | |   | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | |   | +-+ | +-+ | +-+   | |    ›      _|_=___|_=___|_=___|_=___|_=_|_|_=_|_|_=___|_=_|_|_=_|_|_=_|_|_=_|_|_=_|_|_=_|_|_=_|_|_=_|_|_=___|_=_|_|_=_|_|_=_|___=_|_   ›     | |40   |39   |38   |37   |36 | |35 | |34   |33 | |32 | |31 | |30 | |29 | |28 | |27 | |26 | |25   |24 | |23 | |22 |  21 | |  ›     | |     |     |     |     |   | |   | |     |   | |   | |   | |   | |   | |   | |   | |   | |     |   | |   | |   |     | |  ›     | |     |     |     |     |   | |   | |     |   | |   | |   | |   | |   | |   | |   | |   | |     |   | |   | |   |     | |  ›     | |     |     |     |     |   | |   | |     |   | |   | |   | |   | |   | |   | |   | |   | |     |   | |   | |   |     | |  ›     > |     |     |     |     |   | |   | | IC TYPE  6520   SAME AS U23 IN 1200XL | |   | |   | |     |   | |   | |   |     | |  ›     | |     |     |     |     |   | |   | |     |   | |   | |   | |   | |   | |   | |   | |   | |     |   | |   | |   |     | |  ›     | |     |     |     |     |   | |   | |     |   | |   | |   | |   | |   | |   | |   | |   | |     |   | |   | |   |     | |  ›     | |     |     |     |     |   | |   | |     |   | |   | |   | |   | |   | |   | |   | |   | |     |   | |   | |   |     | |  ›     |_|_1___|_2___|_3___|_4___|_5_|_|_6_|_|_7___|_8_|_|_9_|_|10_|_|11_|_|12_|_|13_|_|14_|_|15_|_|16___|17_|_|18_|_|19_|__20_|_|  ›       | =   | =   | =   | =   | = | | = | | =   | = | | = | | = | | = | | = | | = | | = | | = | | =   | = | | = | | = |   = |    › +-----+-+   +-+   +-+   +-+   +-+ | +-+ | +-+   +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+   +-+ | +-+ | +-+ |   +-+    › |                                 |     |           |     |     |     |     |     |     |     |           |     |     |   |      › |                                 |     |           |     |     |     +----->----->---+ |     |           |     |     |   |      › |                                 |     |           |     |     |           |     |   | |     |           |     |     |   |      › |                                 |     |           |     |     +----------->-+   |   | |     |           |     |     |   |      › |                                 |     |           |     |                 | |   |   | |     |           |     |     |   |      › |                                 |     |           |     +-------------+   | |   |   | |     |           |     |     |   |      › |                                 |     |           |                   |   | |   |   | |     |           |     |     |   |      › |                                 |     |           +-------------+     | +-+ |   |   | |     |           |     |     |   |      › |                                 |     |                         |     | |   |   |   | |     |           |     |     |   |      › |                                 |     |                         |     | | +->---+   | |     |           |     |     |   |      › |                                 |     |                         |     | | | |       | |     |           |     |     |   |      › |                                 |     |                         |     | +->->---+   | |     |           |     |     |   |      › |                                 |     |                         |     |   | |   |   | |     |           |     |     |   |      › |                                 |     +-------------+           |   +->--->->--->--->-+     |           |     |     |   |      › |                                 |                   |           |   | |   | |   |   |       |           |     |     |   |      › +-------------------+             +------------------->-----+   +->--->->--->->--->--->-------+           |     |     |   |      › |                   |                                 |     |   | |   | |   | |   |   |                   |     |     |   |      › |     +------------->--------------------------------->----->--->->--->->--->->--->--->------------------->----->----->---+      › |     |             |                                 |     |   | |   | |   | |   |   |                   |     |     |          › |     +-+-----+     |     +-+   +-+   +-+   +-+   +-+ | +-+ | +-+ | +-+ | +-+ | +-+   +-+                 |     |     |          › |    _|_=_____=_____=_____=_|___=_|___=_|___=_|___=_|_|_=_|_|_=_|_|_=_|_|_=_|_|_=_|___=_|_                |     |     |          › |   | |28    27    26    25 |  24 |  23 |  22 |  21 | |20 | |19 | |18 | |17 | |16 |  15 | |               |     |     |          › |   | |                     |     |     |     |     | |   | |   | |   | |   | |   |     | |               |     |     |          › |   | |                     |     |     |     |     | |   | |   | |   | |   | |   |     | |               |     |     |          › |   | |                     |     |     |     |     | |   | |   | |   | |   | |   |     | |               |     |     |          › |   > |                     IC TYPE 27128 EPROM  128K (16K X 8) | |   | |   | |   |     | |               |     |     |          › |   | |                     |     |     |     |     | |   | |   | |   | |   | |   |     | |               |     |     |          › |   | |                     |     |     |     |     | |   | |   | |   | |   | |   |     | |               |     |     |          › |   | |                     |     |     |     |     | |   | |   | |   | |   | |   |     | |               |     |     |          › |   |_|_1_____2_____3_____4_|___5_|___6_|___7_|___8_|_|_9_|_|10_|_|11_|_|12_|_|13_|__14_|_|               |     |     |          › |     | =     =     =     = |   = |   = |   = |   = | | = | | = | | = | | = | | = |   = |                 |     |     |          › |     | |     |   +-+   +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ |                 |     |     |          › |     |-+     |   |     |   | |   | |   | |   | |   | |   | |   | |   | |   | |   | |   |                 |     |     |          › |     |       |   |     |   | |   | |   +->--->->--->->--->->--->->--->->--->->--->->--->----------------->----->-----+          › |     +-R2.2K-+   |     |   | |   | |   | |   | |   | |   | |   | |   | |   | |   | |   |                 |     |     |          › |     |       |   |     |   | |   | |   | |   | |   +->--->->--->->--->->--->->--->->--->-----------------+     |     |          › |     |       |   |     |   | |   | |   | |   | |   | |   | |   | |   | |   | |   | |   |                       |     |          › |     +------->--->-+   | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+ | +-+                       |     |          › |     |       |  _|_=___|_=___|_=___|_=___|_=___|_=___|_=___|_=___|_=___|_=___|_=___|_=___                      |     |          › |     |       | | |24   |23   |22   |21   |20   |19   |18   |17   |16   |15   |14   |13   |                     |     |          › +----->-* SW *+ | |     |     |     |     |     |     |     |     |     |     |     |     |                     |     |          › |     |         | |     |     |     |     |     |     |     |     |     |     |     |     |                     |     |          › |     |         | |     |     |     |     |     |     |     |     |     |     |     |     |                     |     |          › |     |         > |     |   THIS IS NOT AN IC - IT IS A PLUG INTO U10   |     |     |     |                     |     |          › |     |         | |     |     |     |     |     |     |     |     |     |     |     |     |                     |     |          › |     |         | |     |     |     |     |     |     |     |     |     |     |     |     |                     |     |          › |     |         | |     |     |     |     |     |     |     |     |     |     |     |     |                     |     |          › |     |         |_|_1___|_2___|_3___|_4___|_5___|_6___|_7___|_8___|_9___|10___|11___|12___|                     |     |          › |     |           | =   | =   | =   | =   | =   | =   | =   | =   | =   | =   | =   | =                         |     |          › |     |           +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+   +-+                         |     |          › |     |                                                                             |                           |     | › |     |                         +--------------------------------------------------->---------------------------+     | › |     |                         |                                                   |                                 | › |     |                         |     +--------------------------------------------->---------------------------------+ › |     |                 SEL4    |     |                                             |       › |     +-------------+     *     |     |           +-----+-----+                     |       › |                   |     |     |     |           |     |     |                     |       › |                ___=_____=_____=_____=_____=_____=_____=___  |                     |       › |               |  14    13    12    11    10     9     8   | |                     |       › |               |                                           | |                     |       › |               >          74HC02  QUAD 2 NOR               | |                     |       › |               |                                           | |                     |       › |               |___1_____2_____3_____4_____5_____6_____7___| |                     |       › |                   =     =     =     =     =     =     =     |                     |       › |                         |     |           |     |     |     |                     |       › +-------------------------+-----+-----------+-----+-----+-----+---------------------+       ›                                                                                             ›                                                                                             ›    SW - SWITCH  TO SELECT NORMAL OR HISPEED EPROM CODE.›  SEL4 - WIRE TO PIN 1,5 OF U12 (74LS00) .. CUT TRACE TO 1,5 AT LEFT END OF J4›   R/W - WIRE TO PIN 35 OF U7 (6532).         | ›   CS2 - WIRE TO PIN 12 OF U8 (6810).    ----->---- VERTICAL WIRE DOES NOT CONNECT.›  CLK2 - WIRE TO PIN 39 OF U7 (6532).         | ›   RST - WIRE TO PIN 34 OF U7 (6532).    -----+---- VERTICAL WIRE CONNECTS TO HORIZONTAL WIRE.›                                              | ›››››››››››››››››››››››››