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2250 3
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IBM 2250 3 Manual
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Table of Contents
2250 Operations
Vectors and Points
Characters
Table 1 Character Display Characteristics
Alphameric Keyboard
Programmed Function Keyboard
Graphic Mode Orders
Table 2 Mode Orders
Character Mode Orders
Control Mode Orders
Light Pen Mode Orders
Display Regeneration
Display Regeneration Timing
Table 3. Displayable Vectors Per 2250-3 at a Regeneration Rate of 40 Cps
Table 4. Displayable Vectors Per 2250-3 at a Regeneration Rate of 30 Cps
Table 5 Displayable Characters Per 2250-3 at a Regeneration Rate of 4-0 Cps
Table 6 Displayable Characters Per 2250-3 at a Regen- Eration Rate of 30 Cps
2840 Operations with the Channel
Interface Operations
Table 7 Status Byte Bit Assignments
Commands
Read Commands
Write Buffer Command
Table 9 Sense Bit Assignments
Table 10 Buffer Program Example
General
Orders
Table 11 Sample Entity Routine
Table 12 Feedback by Light Pen Tracking History, Example Routine
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Systems Reference Library
IBM System/360 Component Description
IBM 2250 Display Unit Model 3
IBM 2840 Display Control Model 2
This document presents detailed information about IBM 2250
Display Unit Model 3/IBM 2840 Display Control Model 2 pro-
gramming, operation, and special features. The material is
presented with the assumption that the reader has read the
IBM System/360 Principles of Operation manual, Form
GA22-6821.
The following publications may also be of interest to the
reader:
•
IBM System/360 Component Description:
IBM 2250 Display Unit Model 1, Form GA27-2701.
•
IBM System/360 Operating System, Graphic Programming
Services for IBM 2250 Display Unit, Form GC27-6909,
File No. 8360-03
Form GA27-2721-1
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