1 - Al Kossow's Bitsavers

CHAPTER
2
PRINCIPLES OF OPERATION
TABLE OF CONTENTS
Section
2.1
2.2
2.2.1
2.2.1.1
2.2.1.2
2.2.1.3
2.2.2
2.2.2.1
2.2.2.2
2.2.2.3
2.2.2.4
2.2.2.5
2.3
2.3.1
2.3.1.1
2.3.1.2
2.3.1.3
2.3.1.4
2.3.2
2.3.2.1
2.3.3
2.3.3.1
2.3.3.2
2.3.3.3
2.3.3.4
2.3.4
2.3.4.1
2.3.4.2
2.3.5
2.3.6
2.3.6.1
2.3.6.2
2.3.6.3
2.3.6.4
2.3.7
2.3.7.1
2.3.7.2
2.3.8
Title
MAIN SYSTEM UNIT COMPONENTS
ATRPS POWER SUPPLY UNIT .
Primary Oscillation Circuit .
Power Supply Circuit .
Overcurrent Prevention Circuit of the MOS-FET
On-Off Control Circuit .
Inrush Current Prevention Circuit .
Secon da ry Ci rcuit .
-5V and -12V Circuit .
+12V Supply Circuit .
+5V Supply Circuit .
Overheating Prevention Circuit .
Power Good Signal Generation Circuit .
ANTA MAIN CONTROL BOARD OPERATION .
System Clock Generation Circuit .
Select CPU Operation Speed .
LED Indications .
Select NPX (80287) Operation Speed .
Ose; 11 ator .
System Reset Signal Generation Circuit .
System Reset Circuit .
Internal Memory Control Circuit .
RAM Chip Type ••.•...•...•..••...•.•.....••••..••..••..
RAf\1 Chip Addresses ...•....•...••..••......••......••..
Jumper Connector Function .
Operation of ~~emory Control Circuit .•.................
Byte/Word Access & 16-8 Bit Data Conversion .
Data Bus Control Signal on GAATDB .
Circuit Operation of Data Conversion .
1/0 Device Access Circuit .
OMA Contral Circuit .
Page Register Setting Circuit .
8-bit DNA {Internal memory -- 1/0) .
8-bit DMA (Internal memory -- Internal memory) .
16-bit DMA (Internal memory -- 1/0) .
Ready Signal Control Circuit .
Insertion flore Wait Cycle .
Zero Wait Cycl e Request .
Command Delay Signal Control Circuit .
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