Accumulator Shifting Unit 1 Accumulator Shifting Unit 2 Accumulator Main Adder Computer Control I Computer Control X Computer Control II Computer Control III Computer Control IV Computer Control V Computer Control VI Computer Control VII Computer Control VIII Computer Control IX Coincidence Unit Clock Generator Complementer/Collater Control Switches and Logic Counter Digit Pulse Generators Engineers Control Panel Frigs Half Adder Type 1 Half Adder Type 2 Main Control Unit Multiplicand Tank Memory Units Multiplier Tank Order Coder Order Decoder 1 Order Decoder 2 Order Flashing Unit Order Tank Printer Sequence Control Tank Initial Orders Loader Timing Control Tank Tank Address Decoder 0 Tank Address Decoder 1 Tank Address Distribution Tank Address Flashing Units Tank Address Decoding Final Stage Tape Reader Test Frigs Transfer Unit | ||
Tank Address Flashing Units
The Tank Number Flashing Unit is a group of flipflops, arranged to be set by clocking either the SCT (in Stage 1) or the Order Tank (in Stage 2) with the appropriate digiti pulses: D25 - D29. The flipflops are reset at the same time as the Order Flashing Unit, and so the ResetFlash signal, produced there is used for this. In addition to the tank number flipflops, there are two further bits in the instruction that need to be set: bit 1 which indicates the instruction length, and bit 2, which indicates if we are accessing an odd or even short word. Accordingly, there are two further flipflops which record these two bits from the instruction. Once again, the decoding of the tank numbers requires both positive and negative outputs from the flipflops, so inverters will be needed here. This unit is only given a textual description, but, as with the Order Flashing Unit, it is fairly clear apart from the resetting arrangement.
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