Service Manuals, User Guides, Schematic Diagrams or docs for : xerox mesa 3.0_1977 listing Display.mesa_Oct77

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display.mESA                    24-0CT-77 18:23:01                                       Page 1


-- File: display.mesa    Edited by: Johnsson, September 27, 1977        11:23 AM
DIRECTORY
  SystemDefs: FROM "systemdefs",
  StreamDefs: FRO~I "streamdefs",
  RectangleDefs: FROM "rectangledefs";
DEFINITIONS FROM StreamDefs, RectangleDefs;
Display: PROGRAM
  IMPORTS Rectang1eOefs, StreamDefs, SystemDefs EXPORTS StreamDefs SHARES StreamDefs =
  BEGIN
-- CHARACTER constants
  NUL: CIIARACTER = OC;
  TAB: CHARACTER = l1C;
  CR: CHARACTER = 15C;
  BackSpace: CHARACTER = 10C;
  Contl'olA: CHARACTrR = lC;
  Space: CHARACTER = 40C;
  MaxCharCode: CHARACTER = 377C;
-- GLOBAL PUBLIC Data
 defau1tdisp1aystream: PUBLIC DisplayHandle       ~   NIL;
 disp1aystreams: Disp1ayHandle ~ NIL;
-- Mesa Display Stream Routines
 CreateOisp1ayStream: PUBLIC PROCEDURE [rectangle: Rptr] RETURNS[DisplayHandle]
   BEGIN
   -- declare locals
     ds: DisplayHandle;
   -- now create stream structure and init it
     ds ~ SystemDefs.AllocateHeapNode[SIZE[Display StreamObject]];
     ds~ ~ StreamObject[ResetDisplayStream. GetNOP. PutbackNOP. WriteDisp1ayChar.
        EndoFNOP. ')estroyDisplayStream. Display[ ...

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