Main Control And Arithmetic Module; Block Control And Interrupt Module; Storage Module; Input/Output Sub-Modules - Control Data 3100 Reference Manual

MAIN CONTROL AND ARITHMETIC MODULE
This module, standard in all 3100 systems, controls internal operations, executes 24-bit
precision fixed point arithmetic and 48-bit precision fixed point addition and subtraction
instructions. Boolean, character word processing, and decision operations are also processed
by this module. Floating point, BCD, and 48-bit precision multiplication and division in-
structions are classified as trapped instructions if the optional arithmetic module is absent
from the system. Trapped instructions may be processed under control of an interpretive soft-
ware routine.
BLOCK CONTROL AND INTERRUPT MODULE
Logic associated with this module controls Search and Move operations, external equip-
ment and typewriter
110,
real-time referencing, and operations with the register file. In-
terrupt logic, also located in this module, processes Internal,
110,
Trapped Instruction, and
Power Failure interrupts.
STORAGE MODULE
A unique 4,096-word memory module is standard in e:very 3100 System. A customer may
select combinations of magnetic core storage
(MCS)
modules to increase the total storage
capacity of his computer system to 8,192; 16,384 or 32,768 words. The following optional
storage modules are available:
• 3108 - 4,096-word (16,384 characters) MCS memory expansion unit. This unit
is used only to expand the standard 4,096 word memory to 8,192 words.
• 3109- 8,192-word (32,768 characters) MCS memory module (requires additional
chassis).
• 3103 -16,384-word (65,536 characters) MCS memory module (requires addi-
tional chassis).
Memory configurations are shown in Table 1-1.
TABLE 1-1. OPTIONAL MEMORY CONFIGURATIONS
Total Expanded Memory Modules Required in
Memory Capacity Addition to 4K Memory in 3104
8K 3108
16K
3108 and 3109
32K 3108.3109 and 3103
INPUT! OUTPUT SUB-MODULES
Two types of I/O Channels are available:
3106 Communication Channel (12-bit)
3107 Communication Channel (24-bit)
3106
The 3106 is a bidirectional 12-bit, parallel data channel. A maximum of four 3106
channels may be used in a 3100 System and up to eight peripheral controllers may be
connected to each channel. Cabinet space is provided for mounting two 3106 channels
per I/O module.
1-3
Rev. B