SYSTEM BUS
— PIC: To control priority sequence over
I/O interruption from either I/O CONT
or I/O MOTHER (option), as well as to
inform the higher interrupt to the pro
cessor.
—
DMA: For control of DMA data transfer between
an option device and FDD controller in
I/O CONT and system memory.
— ROM: A
8
RB read-only-memory for hardware initia
lizing, initial checking, OS loading, and
p-debugger.
—
RAM: A system memory with a capacity of 256KB
expandable by 128KB up to 512KB
-- I/O CONT: See 1-2-2
Option involved in the CUP
System memory (RAM)
... Up to 512KB (max.) by expansion of each
bord
128, 256, 384KB.
Real Time Clock (RTC) ... Data and time control.
It functions by
backup of battery when power OFF.
1.2.2 I/O CONT
•
I/O CONT modifies the system bus into the I/O bus in order to
control the circuit of device, option device and desplay controller
which are connected to I/O bus.
Device controllers inside I/O controller is connected to I/O bus,
and address is designated to a certain I/O memory area.
Modified is connected with DISPLAY CONT and optional device
controller as I/O BUS.
1-8
Содержание AS-100M
Страница 1: ...Canon FIELD SERVICE MANUAL ...
Страница 26: ...2 2 5 FDD Media Canon specified MDD 512DD 512B sector 2 3 ...
Страница 30: ...ICURRENT LÖÖPl Available soon 2 7 ...
Страница 39: ...3 3 5 FDD 3 3 1 External View Housing plate Fig 3 3 1 Fig 3 3 2 3 5 ...
Страница 41: ...3 4 8 FDD 3 4 1 External View Housing Fig 3 4 1 Fig 3 4 2 3 7 ...
Страница 43: ...3 5 PRINTER Refer to PRINTER TECHNICAL GUIDE 3 9 ...
Страница 47: ... 2 KEYBOARD 3 5 FDD 4 3 ...
Страница 48: ... 8 FDD 4 4 ...
Страница 98: ...5 5 3 Power supply unit 5 5 1 Referring to 5 6 of paragraph 5 5 1 1 remove power supply unit Fig 5 5 5 5 21 ...
Страница 100: ...8 FDD Fuse 1 Replace two 5A fuses 8 FDD as In Fig 5 5 7 5 23 ...
Страница 107: ...Chapter 7 Troubleshooting 7 1 At System Up 7 1 ...
Страница 129: ...Chapter 8 Appendix 8 1 Unit Configuration and General Wiring ...
Страница 130: ...8 1 Unit Configurations and General Wiring 8 1 POWER SWITCH ...
Страница 135: ...Fig 8 1 6 8 FDD For 115 120 230 240V POWER SWITCH ...
Страница 136: ...CANON INC COPYRIGHT g 198 BY CANON INC Printed in Japan Feb 1983 E Y 8 6 0 7 2 2 2 2 ...