Functional Block Diagram Of The Cpu And The Keyboard And Display Board - HP 8133A Service Manual

Microprocessor Board (CPU)
The following figure shows a block diagram of the microprocessor
board:
U
Functional Block Diagram of the CPU and the Keyboard and
The HP 8133A Microprocessor board is built around a 68000
microprocessor running at 8 MHz. An MFP (multi-functional
peripheral) is used for interrupt control, generation of a 20 ms clock
interrupt, alnd for serial I/O (called LAB-10). The firmware is stored
in two
64
KByte (64
on the Microprocessor board include a keyboard/display controller,
an HP-IB controller and a gate array which is used as a frequency
counter. The device bus is a secondary bus system which controls the
hardware on the signal boards.
Figure 7-2.
Display Board
Theory of Operation