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RAMMER Edition #5 Revision 3 updates: 1) Fixed /MD so that it works properly with 2 MB RAM systems. 2) Fixed signed math bug when >127 MMU blocks are assigned to a RAM drive. (maximum # of blocks in still 201) 3) Optimized 6809 sector read/write for speed.
author David Ladd <drencor-xeen@users.sourceforge.net>
date Wed, 19 Jun 2019 18:21:55 -0500
parents 31cd1f1b4fb0
children
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              IFNE      ATARIVTIO.D-1
ATARIVTIO.D   SET       1

********************************************************************
* VTIO Defs for the Atari XE/XL
* Everything that the VTIO driver needs is defined here, including
* static memory definitions

* Constant Definitions
KBufSz    EQU       8                   circular buffer size


* Driver Static Memory
          ORG       V.SCF
V.CurRow  RMB       1
V.CurCol  RMB       1
V.CurChr  RMB       1                   character under the cursor
V.CapsLck RMB       1                   caps lock flag
V.KySns   RMB       1                   key sense flags
V.EscCh1  RMB       2                   escape vector handler
V.EscVect RMB       2                   escape vector handler
V.IBufH   RMB       1                   input buffer head
V.IBufT   RMB       1                   input buffer tail
V.InBuf   RMB       KBufSz              input buffer
          RMB       250-.
V.Last    EQU       .

          ENDC