git.sur5r.net Git - cc65/blob - asminc/em-kernel.inc

   1 ;/*****************************************************************************/
   2 ;/*                                                                           */
   3 ;/*                              em-kernel.inc                                */
   4 ;/*                                                                           */
   5 ;/*                           EM kernel interface                             */
   6 ;/*                                                                           */
   7 ;/*                                                                           */
   8 ;/*                                                                           */
   9 ;/* (C) 2002-2003 Ullrich von Bassewitz                                       */
  10 ;/*               Römerstrasse 52                                             */
  11 ;/*               D-70794 Filderstadt                                         */
  12 ;/* EMail:        uz@cc65.org                                                 */
  13 ;/*                                                                           */
  14 ;/*                                                                           */
  15 ;/* This software is provided 'as-is', without any expressed or implied       */
  16 ;/* warranty.  In no event will the authors be held liable for any damages    */
  17 ;/* arising from the use of this software.                                    */
  18 ;/*                                                                           */
  19 ;/* Permission is granted to anyone to use this software for any purpose,     */
  20 ;/* including commercial applications, and to alter it and redistribute it    */
  21 ;/* freely, subject to the following restrictions:                            */
  22 ;/*                                                                           */
  23 ;/* 1. The origin of this software must not be misrepresented; you must not   */
  24 ;/*    claim that you wrote the original software. If you use this software   */
  25 ;/*    in a product, an acknowledgment in the product documentation would be  */
  26 ;/*    appreciated but is not required.                                       */
  27 ;/* 2. Altered source versions must be plainly marked as such, and must not   */
  28 ;/*    be misrepresented as being the original software.                      */
  29 ;/* 3. This notice may not be removed or altered from any source              */
  30 ;/*    distribution.                                                          */
  31 ;/*                                                                           */
  32 ;/*****************************************************************************/
  33
  34
  35
  36 ;------------------------------------------------------------------------------
  37 ; The driver header
  38
  39 .struct EMD_HDR
  40         ID      .byte   3       ; Contains 0x65, 0x6d, 0x64 ("emd")
  41         VERSION .byte   1       ; Interface version
  42         JUMPTAB .struct
  43             INSTALL     .word   ; INSTALL routine
  44             UNINSTALL   .word   ; UNINSTALL routine
  45             PAGECOUNT   .word   ; PAGECOUNT routine
  46             MAP .word   ; MAP routine
  47             USE .word   ; USE routine
  48             MAPCLEAN    .word   ; MAPCLEAN routine
  49             COPYFROM    .word   ; COPYFROM routine
  50             COPYTO      .word   ; COPYTO routine
  51         .endstruct
  52 .endstruct
  53
  54 ;------------------------------------------------------------------------------
  55 ; The EMD API version, stored in EMD_HDR::VERSION
  56
  57 EMD_API_VERSION         = $00
  58
  59 ;------------------------------------------------------------------------------
  60 ; The asm equivalent to the C em_copy structure
  61
  62 .struct EM_COPY
  63         BUF     .word           ; Memory buffer to copy from or to
  64         OFFS    .byte           ; Offset into page
  65         PAGE    .word           ; Starting page to copy from or to
  66         COUNT   .word           ; Number of bytes to copy
  67         UNUSED  .byte           ; Make the size 8 bytes
  68 .endstruct
  69
  70 ;------------------------------------------------------------------------------
  71 ; Variables
  72
  73         .global _em_drv                         ; Pointer to driver
  74
  75 ;------------------------------------------------------------------------------
  76 ; Driver entry points
  77
  78         .global emd_install
  79         .global emd_uninstall
  80         .global emd_pagecount
  81         .global emd_map
  82         .global emd_use
  83         .global emd_commit
  84         .global emd_copyfrom
  85         .global emd_copyto
  86
  87 ;------------------------------------------------------------------------------
  88 ; ASM functions
  89
  90         .global _em_unload
  91         .global _em_install
  92         .global _em_uninstall
  93         .global _em_pagecount
  94         .global _em_map
  95         .global _em_use
  96         .global _em_commit
  97         .global _em_copyfrom
  98         .global _em_copyto
  99
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