IBM System/370

Page of GC20-173(}-0
Revised 11/20/70
By TNL GN20-2277
CONTENTS
Section 01:
System Highlights. • . • .
Section 10: Architecture and System Components
10:05 Architecture Design •.••.•..•.
1
6
6
10:10 The Central Processing Unit (CPU) and the system Console.
8
8
8
Central Processing Unit. . . . •.•
Instruction and Execution Units ••..
Local Storage and Control Storage .•.
• • • • 8
Program States and System Interrupts • . • • • •
9
9
CPU Features • . • • • • • • .
CPU Cooling. • • • • •
Motor Generator Set. .
System Console • • . • •
10:15 Storage •.••••••••
Processor (Main) Storage ••••
· 11
· 13
13
· 14
· 15
Processor Storage Reconfiguration.
• . • • • • • .. 18
Storage Ripples. • • • • •
High-Speed Buffer Storage. • • . • .
10:20 Channels •••••••••••
General Description. • • • • • • • . . • • • •
The 2880 Block Multiplexer Channel •
· 19
19
24
· 24
· 28
10:25 Block Multiplexing Operations with Rotational Position
Sensing Devices. • • • • • • • • . • • • • • • . • •
Summary of Block Multiplexing Operations with I/O
Devices. • • • • • • • • • • • • •• • • • • •
10:30 Standard and Optional System Features.
Standard Features. •
Optional Features. •
Section 20: I/O Devices ••••
20:05 I/O Device Support.
20:10 3330 Disk Storage and 3830 Storage Control.
20:15 The 2305 Fixed Head Storage Module and 2835 Storage
Control Models 1 and 2 • • • • •
Data Recording on the Model 2 ••
Data Recording on the Modell ••
· 30
• • • 33
34
34
· . 35
36
36
· 36
· 41
· . 42
· 43
• • • 45
Effective Capacity of 2305 Facilities ••
Rotational Position Sensing and Multiple Requesting ••. 47
20: 20 The 3211 Printer • • • • • • • • • • •
20:25 The 3803/3420 Magnetic Tape Subsystem.
· 50
· 51.1
Section 30: Programming Systems Support. • • . 52
30:05 Trends in Data Processing and Programming Systems.. . 52
30: 10 OS Support . • . • • • • . • . . 53
Section
40:05
40:10
40:15
40:20
40: Emulator Programs. • •••••
Features Common to 7000-Series Emulator Programs
7070/1074 Emulator Program • • • • • •
709/7090/7094/709411 Emulator Program.
7080 Emulator Program. • • . •
Section 50: Reliability, Availability, and Serviceability (RAS)
Features • •
50:05 Introduction ••
t:::'7
• ..J I
· 57
60
• 63
66
69
• 69
50:10 Recovery Features. • • . • • • • • • • • . • • 70
Automatic CPU Retry. . • • • • 70
Eec Validity Checking on Processor Storage .
I/O Operation Retry. • . • . • .
Expanded Machine Check Int.errupt Facilities.
Recovery Management Support (RMS) - as MFT and M~~ •
MeR and CCll Routines ~ ~ • • • . .
Error Recovery Procedures (ERP' s). • •
71
• 73
74
• • 79
• 79
· 81
I