modder_mikeI might be missing a few connections yet which I'll correct as I come across them, but here is the pinout of the XC3S250E FPGA on the control board. Note that the SRAM and the Flash share an interface bus. Also note that the JTAG interface is 2.5V logic.
| Pin | Function | Pin | Function |
| 1 | PROG_B (Pullup to +2.5V) | 73 | GND |
| 2 | LED_L1_SIN | 74 | SRAM_A16; FLASH_A15 |
| 3 | LED_L2_SIN | 75 | SRAM_A15; FLASH_A14 |
| 4 | LED_L3_SIN | 76 | SRAM_A14; FLASH_A13 |
| 5 | LED_R1_SIN | 77 | SRAM_A13; FLASH_A12 |
| 6 | 78 | ||
| 7 | LED_R2_SIN | 79 | VCCO_1 (+3.3V) |
| 8 | LED_R3_SIN | 80 | VCCINT (+1.2V) |
| 9 | VCCINT (+1.2V) | 81 | SRAM_A12; FLASH_A11 |
| 10 | LED_XERR | 82 | SRAM_A11; FLASH_A10 |
| 11 | GND | 83 | FLASH_RESET# |
| 12 | 84 | ||
| 13 | VCCO_3 (+3.3V) | 85 | SRAM_A10; FLASH_A9 |
| 14 | LED_L4_SIN | 86 | SRAM_A9; FLASH_A8 |
| 15 | LED_L5_SIN | 87 | SRAM_A8; FLASH_A7 |
| 16 | LED_L6_SIN | 88 | SRAM_A7; FLASH_A6 |
| 17 | LED_R4_SIN | 89 | |
| 18 | 90 | GND | |
| 19 | GND | 91 | SRAM_A6; FLASH_A5 |
| 20 | LED_R5_SIN | 92 | SRAM_A5; FLASH_A4 |
| 21 | LED_R6_SIN | 93 | SRAM_A4; FLASH_A3 |
| 22 | LED_CAL_SIN | 94 | SRAM_A3; FLASH_A2 |
| 23 | CPLD_PIN_44 | 95 | |
| 24 | CPLD_PIN_6 | 96 | SRAM_A2; FLASH_A1 |
| 25 | I2C_SCL | 97 | SRAM_A1; FLASH_A0 |
| 26 | I2C_SDA | 98 | SRAM_A0; FLASH_DQ15/A-1 |
| 27 | GND | 99 | GND |
| 28 | VCCO_3 (+3.3V) | 100 | VCCO_1 (+3.3V) |
| 29 | 101 | ||
| 30 | VCCAUX (+2.5V) | 102 | VCCAUX (+2.5V) |
| 31 | SRAM_CE# | 103 | SRAM_WE#; FLASH_WE# |
| 32 | LED_XLAT | 104 | FLASH_CE# |
| 33 | LED_MODE | 105 | FLASH_OE# |
| 34 | LED_BLANK | 106 | |
| 35 | SRAM_OE# | 107 | FLASH_RY/BY# |
| 36 | 108 | JTAG_TMS | |
| 37 | GND | 109 | JTAG_TDO |
| 38 | 110 | JTAG_TCK | |
| 39 | LT1933_ENABLE | 111 | FAN_TACHOMETER |
| 40 | 112 | INPUT_CONN_PIN_5 | |
| 41 | 113 | INPUT_CONN_PIN_4 | |
| 42 | VCCO_2 (+3.3V) | 114 | |
| 43 | SRAM_BHE# | 115 | VCCINT (+1.2V) |
| 44 | SRAM_BLE# | 116 | INPUT_CONN_PIN_7 |
| 45 | VCCINT (+1.2V) | 117 | INPUT_CONN_PIN_2 |
| 46 | GND | 118 | GND |
| 47 | 119 | INPUT_CONN_PIN_8 | |
| 48 | 120 | INPUT_CONN_PIN_3 | |
| 49 | VCCO_2 (+3.3V) | 121 | VCCO_0 (+2.5V) |
| 50 | SRAM_IO7; SRAM_IO15; FLASH_DQ7 | 122 | |
| 51 | SRAM_IO6; SRAM_IO14; FLASH_DQ6 | 123 | CPLD_PIN_8 |
| 52 | SRAM_IO5; SRAM_IO13; FLASH_DQ5 | 124 | CPLD_PIN_3 |
| 53 | SRAM_IO4; SRAM_IO12; FLASH_DQ4 | 125 | CPLD_PIN_2 |
| 54 | SRAM_IO3; SRAM_IO11; FLASH_DQ3 | 126 | CPLD_PIN_5 |
| 55 | GND | 127 | GND |
| 56 | OSC_40MHz | 128 | OUTPUT_CONN_PIN_5 |
| 57 | 129 | OUTPUT_CONN_PIN_8 | |
| 58 | SRAM_IO2; SRAM_IO10; FLASH_DQ2 | 130 | OUTPUT_CONN_PIN_7 |
| 59 | SRAM_IO1; SRAM_IO9; FLASH_DQ1 | 131 | OUTPUT_CONN_PIN_4 |
| 60 | DIAGNOSTIC_LED_YELLOW | 132 | CPLD_PIN_43 |
| 61 | GND | 133 | GND |
| 62 | DIAGNOSTIC_LED_RED | 134 | OUTPUT_CONN_PIN_3 |
| 63 | SRAM_IO0; SRAM_IO8; FLASH_DQ0 | 135 | OUTPUT_CONN_PIN_6 |
| 64 | VCCO_2 (+3.3V) | 136 | |
| 65 | VCCAUX (+2.5V) | 137 | VCCAUX (+2.5V) |
| 66 | FLASH_A19 | 138 | VCCO_0 (+2.5V) |
| 67 | FLASH_A18 | 139 | LED_SCLK |
| 68 | FLASH_A17 | 140 | LED_GSCLK |
| 69 | 141 | ||
| 70 | SRAM_A17; FLASH_A16 | 142 | CPLD_PIN_42 |
| 71 | DIAGNOSTIC_LED_ORANGE | 143 | CPLD_PIN_41 |
| 72 | DONE (Pullup to +2.5V) | 144 | JTAG_TDI |
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