Harry Porter's Relay Computer
Click on each photo for an enlargement
Last updated: 23 April 2006  |
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| (More pictures follow below) Features of the Arithmetic Logic Unit: Two 8-bit inputs (from B and C registers) 8-bit result (onto data bus) 3-bit function code input Functions: Add, Increment, And, Or, Xor, Not, Shift-left, Nop Carry output (from Add, Increment) Zero-detect output Features of the Register Unit: 8 Registers (8-bits each) Register Names: A, B, C, D, M1, M2, X, and Y Data Bus (8 LEDs and 8 Switches) Features of the Program Control Unit: Program Counter (16 bits) Instruction Register (8 bits) Jump Target Register (16 bits) Increment Unit (16 bits) Increment Register (16 bits) Address Bus (16 LEDs and 16 Switches) Features of the Sequencer Unit: Clock (Using capacitors for delay) Finite State Control (24 states) Instruction Decoding Main Memory (32K x 8bits, static RAM chip) General Features: Data Bus (8 bits) Address Bus (16-bits) All relays are the identical part (Four-Pole-Double-Throw, 12 Volts) 415 Relays 111 Switches 350 LEDs Max Power Consumption: Estimated 12 Amps @ 13.5 Volts (160 Watts) For more information, click here (Last Updated, 23 April 2006) Back to Harry's homepage: click here Send email to Harry: harry@cs.pdx.edu |
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