PINS 51 - 100
| PIN# | PIN LABEL | DESCRIPTION |
| 51 | FLEX_EXPAN_A_H-20 | Flex Expansion A - Hole 20 |
| 52 | NOT CONFIGURABLE | N/A |
| 53 | FLEX_EXPAN_A_H-21 | Flex Expansion A - Hole 21 |
| 54 | FLEX_EXPAN_A_H-22 | Flex Expansion A - Hole 22 |
| 55 | FLEX_EXPAN_A_H-23 | Flex Expansion A - Hole 23 |
| 56 | FLEX_EXPAN_A_H-24 | Flex Expansion A - Hole 24 |
| 57 | NOT CONFIGURABLE | N/A |
| 58 | NOT CONFIGURABLE | N/A |
| 59 | NOT CONFIGURABLE | N/A |
| 60 | NOT CONFIGURABLE | N/A |
| 61 | FLEX_EXPAN_A_H-25 | Flex Expansion A - Hole 25 |
| 62 | FLEX_EXPAN_A_H-26 | Flex Expansion A - Hole 26 |
| 63 | FLEX_EXPAN_A_H-27 | Flex Expansion A - Hole 27 |
| 64 | FLEX_EXPAN_A_H-28 | Flex Expansion A - Hole 28 |
| 65 | FLEX_EXPAN_A_H-29 | Flex Expansion A - Hole 29 |
| 66 | FLEX_EXPAN_A_H-30 | Flex Expansion A - Hole 30 |
| 67 | FLEX_EXPAN_A_H-31 | Flex Expansion A - Hole 31 |
| 68 | FLEX_EXPAN_A_H-32 | Flex Expansion A - Hole 32 |
| 69 | NOT CONFIGURABLE | N/A |
| 70 | FLEX_EXPAN_A_H-33 | Flex Expansion A - Hole 33 |
| 71 | FLEX_EXPAN_A_H-34 | Flex Expansion A - Hole 34 |
| 72 | FLEX_EXPAN_A_H-35 | Flex Expansion A - Hole 35 |
| 73 | FLEX_EXPAN_A_H-36 | Flex Expansion A - Hole 36 |
| 74 | FLEX_EXPAN_A_H-37 | Flex Expansion A - Hole 37 |
| 75 | FLEX_EXPAN_A_H-38 | Flex Expansion A - Hole 38 |
| 76 | FLEX_EXPAN_A_H-39 | Flex Expansion A - Hole 39 |
| 77 | NOT CONFIGURABLE | N/A |
| 78 | FLEX_EXPAN_A_H-40 | Flex Expansion A - Hole 40 |
| 79 | FLEX_EXPAN_A_H-41 | Flex Expansion A - Hole 41 |
| 80 | FLEX_EXPAN_A_H-42 | Flex Expansion A - Hole 42 |
| 81 | FLEX_EXPAN_A_H-43 | Flex Expansion A - Hole 43 |
| 82 | FLEX_EXPAN_A_H-44 | Flex Expansion A - Hole 44 |
| 83 | FLEX_EXPAN_A_H-45 | Flex Expansion A - Hole 45 |
| 84 | FLEX_EXPAN_A_H-46 | Flex Expansion A - Hole 46 |
| 85 | NOT CONFIGURABLE | N/A |
| 86 | FLEX_EXPAN_A_H-47 | Flex Expansion A - Hole 47 |
| 87 | FLEX_EXPAN_A_H-48 | Flex Expansion A - Hole 48 |
| 88 | FLEX_EXPAN_A_H-49 | Flex Expansion A - Hole 49 |
| 89 | NOT CONFIGURABLE | N/A |
| 90 | NOT CONNECTED | Not Connected to Anything |
| 91 | CLOCK | Global Clock Pin |
| 92 | FLEX_EXPAN_DI2 | Flex Expansion Global DI2 |
| 93 | NOT CONFIGURABLE | N/A |
| 94 | FLEX_EXPAN_A_H-50 | Flex Expansion A - Hole 50 |
| 95 | FLEX_EXPAN_A_H-51 | Flex Expansion A - Hole 51 |
| 96 | NOT CONFIGURABLE | N/A |
| 97 | FLEX_EXPAN_A_H-52 | Flex Expansion A - Hole 52 |
| 98 | FLEX_EXPAN_A_H-53 | Flex Expansion A - Hole 53 |
| 99 | FLEX_EXPAN_DI1 FLEX_EXPAN_A_H-54 |
Flex Expansion Global DI1 Flex Expansion A - Hole 54 |
| 100 | FLEX_EXPAN_A_H-55 | Flex Expansion A - Hole 55 |
Mark Fedorak, Vera Casteel, Kris Pucci, Ron Smith - 1998