May 2014
Intermediate to advanced
320 pages
13h 41m
English
Content preview from Servicing Personal Computers, 3rd Edition
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18 Servicing Personal Computers
31 16 15
87
31 16 15 8
7
0
31 0
User stack pointer, USP 1
Supervisor stack pointer, SSP 1
31 0
Program counter, PC 1
$
TO
Q
)5
15
87
(
*ν*ΪΤ Statusregister <^1
byte» ! * byte)|
Figure 1.15. 68000 register configuration
68341 Floating point mathematics ROM.
68450 Direct memory access (DMA) controller.
68451 Memory management unit.
68560 Serial DMA interface.
68454 Disk controller.
In addition, the 68000 has been designed to operate in conjunction with 6800 support
devices, including:
6822 Parallel interface adaptor (PIA).
6840 Programmable timer/counter.
6843 Disk controller.
6847 Video display controller.
684 ...