Source: ndwiki article "NORD-1 boards"¶

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This is an incomplete compilation of known boards used in the NORD-1 series of computers.

Card cages in a NORD-1.

There is a lot of different boards used in the NORD-1 computer. Most are numbered with a three digit code starting at 101 and at least going up to 504. The NORD-1 was one of the first computers to be constructed of integrated circuits instead of transistors. Almost all of the boards are built with the 74-series IC:s.

Table of NORD-1 Boards¶

ROW| 90N00 | 2B01 | Data Inverter |

|

ROW| 90N04 | | |

|

ROW| 90X08 | | |

|

ROW| 90N40 | 2B01 | Register Enabling |

|

ROW| 101 | 2A01 | Bus memory |

|

ROW| 102 | 2A02 | Register I |

|

ROW| 103 | 2A03 | Arithmetic |

|

ROW| 106 | 2A06 | Interrupt Register |

|

ROW| 108 | 2A08 | Register II |

|

ROW| 109 | 2A09 | Register control |

|

ROW| 110 | 2A10 | Panel buffer |

|

ROW| 113 | | I Card reader contr. (duplex) |

|

ROW| 115 | 2A15 | Arithmetic control |

|

ROW| 119 | | Unknown | [1] |

ROW| 120/II | 2A20/II | I/O control |

|

ROW| 122 | 2A22 | Assembler |

|

ROW| 123 | 2A23 | Cycle counter |

|

ROW| 124 | 2A24 | Counter control |

|

ROW| 125 | 2A25 | Shift counter |

|

ROW| 126 | 2A26 | Shift control |

|

ROW| 127 | 2A27 | Control flip-flops |

|

ROW| 128 | 2A28 | Protection check |

|

ROW| 130 | 2A30 | Addressing control |

|

ROW| 131 | 2A31 | Addressing control |

|

ROW| 132 | 2A32 | Interrupt control |

|

ROW| 133 | 2A33 | Bit instruction |

|

ROW| 134 | 2A34 | Floating control |

|

ROW| 135 | 2A35 | Floating control |

|

ROW| 136 | 2A36 | Floating control |

|

ROW| 137 | 2A37 | Floating control |

|

ROW| 140 | 2A40 | Lamp register |

|

ROW| 141 | 2A41 | Protection |

|

ROW| 145 | | |

|

ROW| 146 | 2A46 | Register transfer |

|

ROW| 150 | 2A50 | Register |

|

ROW| 151 | 2A51 | Time counter |

|

ROW| 157 | 2A57 | Teletype control |

|

ROW| 158/II | 2A58/II | Memory buffer |

|

ROW| 159 | 2A59 | Memory OR |

|

ROW| 160 | | Simplex control |

|

ROW| 160/II | 2A60 | Simplex control |

|

ROW| 163/II | 2A63 | I/O output and clock |

|

ROW| 164 | 2A64 | Reader buffer |

|

ROW| 165 | 2A65 | I/O Input |

|

ROW| 166 | 2A66 | I/O Output |

|

ROW| 168 | 2A68 | Channel interface |

|

ROW| 169 | 2A69 | Cambridge control |

|

ROW| 170 | 2A70 | Duplex buffer |

|

ROW| 179 | 2A79 | Punch buffer |

|

ROW| 180/III | | Device instructions |

|

ROW| 181/II | | Cartridge disc 7/8 register |

|

ROW| 182 | | Data channel register |

|

ROW| 183/II | | Data channel counters |

|

ROW| 184 | 2A84 | I/O Output |

|

ROW| 185 | 2A85 | Line driver/receiver |

|

ROW| 186 | 2A86 | I/O data board |

|

ROW| 187 | 2A87 | I/O Input |

|

ROW| 188 | 2A88 | Paging buffer | [2] |

ROW| 189 | 2A89 | Interface buffer/cable |

|

ROW| 190 | 2A90 | Cable card |

|

ROW| 191 | 2A91 | I/O expander |

|

ROW| 194 | 2A94 | Memory buffer driver |

|

ROW| 195 | | Duplex Start-stop buffer |

|

ROW| 196 | | GH 1101-J control |

|

ROW| 301 | | Reader buffer |

|

ROW| 302 | | Centronics interface |

|

ROW| 305 | | Memory control |

|

ROW| 309 | | Cartridge disc transmit |

|

ROW| 310 | | Cartridge disc receiver |

|

ROW| 311 | | Cartridge timing |

|

ROW| 312 | | Cartridge sequence |

|

ROW| 313/II | | Cartridge control |

|

ROW| 503 | 1A03/II | Data ch. driver | [2] |

ROW| 504 | 1A04/II | Cable card Bus receiver | [2] |

ROW| 512 | | Unknown | [3] |

ROW| 7316 | | Expander |

|

References and sources¶

↑ http://sintran.com/sintran/hardware/nd-1/nd-xxx119.html

↑ 2.0 2.1 2.2 ND-01.005.01 NORD-1 Connectors

↑ http://sintran.com/sintran/hardware/nd-1/nd-xxx512.html

HARDWARE MANUAL NORD 1