| |
|
|
|
| |
Model Groups 4 & 5 announced September 15, 1983 and withdrawn February 17, 1987. Model Group 3 announced September 10, 1984.
The following is the text of an IBM Information Systems Group press fact sheet distributed on September 10, 1984.
| |
 |
|
Commercial performance equivalent to the 4331 model 2. |
|
|
Factory installed option increases engineering/scientific performance up to 1.4 times the model 2 for short precision and 2.2 times for long precision. |
|
|
High-Accuracy Arithmetic Facility:
| |
|
Allows computational procedures with algorithmic verification of results. |
| |
|
New floating-point instructions are implemented for computation of basic arithmetic operations and the scalar product with maximum accuracy. |
| |
|
Provides direct rounding for the short and long floating-point hexadecimal formats. |
|
|
|
Microcode-assisted support for improved performance of frequently used mathematical functions. |
|
|
2 or 4MB of processor storage. |
|
|
Integrated I/O attachments and standard I/O interface channels for maximum system configuration flexibility. |
|
|
Integrated DASD Adapter support. |
|
|
Up to three data channels. |
|
|
Field upgradable to models 4 and 5. |
|
|
Extensive programming support, including VM/SP, SSX/VSE, VSE/SP and OS/VS1. |
| |
| |
|
Serial OEM Interface -- for attaching a variety of non-IBM subsystems, workstations and devices. Board-level microcomputer devices attach to the interface with adapters that provide conversions and control functions. |
|
Programmable Power-Off -- enables the user to turn off the processor under program control. |
|
Problem Determination -- three software tools for user-initiated problem determination: Problem Finder Facility, System Event Trace and System Status Display. |
| |
| |
|
|
Workstation Adapter -- supports the following features/functions beyond the Display/Printer Adapter:
| |
|
3270 extended datastream for extended highlighting. |
| |
|
Seven colors and programmed symbols. |
| |
|
Screen sizes up to 3,564 characters. |
| |
|
APL keyboard. |
| |
|
Combination of both adapters provides 40 ports for attachment of workstations including IBM Displaywriters and Personal Computers. |
|
|
|
Auto-Start -- automatically turns on the processor by telephone via the Remote Operator Control Facility or at a predetermined time and day of the week. The processor powers on and proceeds with initial microcode load, sets the clock and loads the system. |
| |
| |
|
Standard feature for models 4 and 5. |
|
Factory installed option for model 3. |
|
Improves multiplication execution times by a factor of 3 to 8 over microcode implementations. |
|
Uses high-speed array multiplier logic. |
| |
|
| |
| |
| |
|
|
|
