Industrial Micro Systems 464 User Manual

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INDUSTRIAL MICRO SYSTEMS. INC.
MODEL
464
64K DYNAMIC RANDOM ACCESS MEMORY BOARD
***********************************.****************************************.*.
•
2MHZ OR 4MHZ OPERATION
•
8080 OR Z80 OPERATION
•
PARITY CIRCUITRY
•
HIDDEN REFRESH (Ml CYCLE)
•
PHANTOM LINE (pIN 67)
•
NO WAIT STATES
0
•
BANK SELECT LOGIC
•
LOW POWER CONSUMPTION
V
•
FRONT PANEL COMPATIBLE
.6A
+8 VOLTS
•
SELECTABLE PORT ADDRESS
.ZA
+16 VOLTS
'---"
•
AVAILABLE IN HK. 48K. OR 64K
.001A -
-16 VOLTS
MOOELS
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"
"- GENERAL PESCRIPTION
The Model 464 Dynamic Ram Memory Board is fully buffered and uses 16K X 1 bit dynamic memory
circuits. The boards are tested and burned in at 70 degrees centigrade under diagnostic test to insure
reliable operarions.
The 464 board may be ordered as a 32K, 48K, or 64K memory board. In each of these
configurations, the memory is organized into 16K byte banks.
Two modes of operation are provided, Normal Mode and Bank Mode. In the normal mode, the 16K
byte banks occupy contiguous address space. In the bank mode of op~ation, the board is initially
disabled and each 16K byte bank may be mapped into selected quadrants of memory (see Bank
Selection),
The 464 board provides a "Phantom Line" input for systems with ROM memories which utilize this
feature. The user may also configure the board to accept the front panel deposit signal, M-WRITE.
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INDUSTRIAL MICRO SYSTEMS. INC.
D00464 REV A 8/12/80 Page 1 of 6

Industrial Micro Systems 464 Specifications

General

Brand	Industrial Micro Systems
Model	464
Category	Computer Accessories
Language	English

Summary

General Description of Model 464

Configuring the 464 Board

Phantom Line (JACK JD) Configuration

Configures the Phantom Line input for ROM memory systems.

Enable I/O (JACK JB) Setting

Enables the board to respond to I/O commands for bank mode or parity.

I/O Address Selection (JACK JC)

Sets the board's I/O address using shunts on specific pins.

CPU Type Selection (JACK JF)

Selects CPU type (8080 or Z-80) via a shunt for proper operation.

Front Panel Connection (JACK JH)

Configures the board for compatibility with IMSAI front panels.

Memory Speed Adjustment (JACK JA)

Controls memory timing for 200NS or 250NS RAMs.

Parity and Mode Settings

Parity Interrupt Options (JACK JG)

Selects one of eight responses to a parity error condition.

Normal/Bank Mode Selection (JACK JE)

Configures the board for Normal or Bank Switched memory modes.

Standard Board Configuration

Block Diagram Overview

Strapping Option Locations