Product number (P/N): AC2261 ,
Keywords/Tags: AC2261
Date of intro-: ~1970, TimeKeeper IC's (sorted by Year): (Link),
Classification: / Part / Calculator-ChipSet,
Featuring: Logic-technology: LSI (Large Scale Integration), calculator-chipset,
Serie-members: ROCKWELL_parts(E): AC2261 (ChipSet); SHARP_parts(E): AC2261 (ChipSet),
Info: The AC2261 was the strategic ‘brain’ within the ROCKWELL-produced chipset used by SHARP.
The AC2261 managed the internal logic flow.
Primary Function:
The Address Control in the multi-chip architecture of the late 60s, functions were split across several pieces of silicon.
The AC2261 was designated as the Address Control (AC) unit.
Its main responsibilities included:
Instruction Sequencing: It determined the order of operations, acting much like the program counter in a modern CPU.
Register Management:
It controlled the temporary storage areas (registers) where numbers were held during a calculation.
Flow Control: It coordinated with the other chips to ensure that data moved from the input (NRD2256) to the arithmetic unit (AU2271) at the right time.
Used in: DummyBrand: QT8D, SHARP: QT8B, SHARP: QT8D, SHARP_parts(E): 4041PCBC1 (PCB), SHARP_parts(E): 4041PCBC11 (PCB), SHARP_parts(E): 4041PCBD2 (PCB), SHARP_parts(E): 4041PCBD9 (PCB), SHARP_parts(E): 436PCBC11 (PCB)