Lenovo PC 300GL Understanding Your Personal Computer 6267, 6277, 6287 - Page 15

Control Logic, Bus-mastering IDE interface

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Control Logic The control logic consists of the modules on the system board that control access to main and cache memory by the microprocessor and I/O devices. Control logic includes the following devices and functions: Audio-port controller and interface (some models only) Bus-mastering IDE interface Counters and timers Direct memory access (DMA) controller Diskette-port controller and interface Interrupt controller Keyboard and mouse port controller and interface Memory (DRAM) controller Microprocessor-interface control Parallel-port controller and interface PCI-bus interface PCI-to-ISA interface Power-management controller Serial-port controller and interface USB-port controller and interface Microprocessors and Memory 7

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Control Logic
The control logic consists of the modules on the system board that control access to main
and cache memory by the microprocessor and I/O devices.
Control logic includes the
following devices and functions:
±
Audio-port controller and interface (some models only)
±
Bus-mastering IDE interface
±
Counters and timers
±
Direct memory access (DMA) controller
±
Diskette-port controller and interface
±
Interrupt controller
±
Keyboard and mouse port controller and interface
±
Memory (DRAM) controller
±
Microprocessor-interface control
±
Parallel-port controller and interface
±
PCI-bus interface
±
PCI-to-ISA interface
±
Power-management controller
±
Serial-port controller and interface
±
USB-port controller and interface
Microprocessors and Memory
7