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cc65/asminc/em-kernel.inc

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;/*****************************************************************************/
;/* */
;/* em-kernel.inc */
;/* */
;/* EM kernel interface */
;/* */
;/* */
;/* */
;/* (C) 2002-2003 Ullrich von Bassewitz */
;/* R<>merstrasse 52 */
;/* D-70794 Filderstadt */
;/* EMail: uz@cc65.org */
;/* */
;/* */
;/* This software is provided 'as-is', without any expressed or implied */
;/* warranty. In no event will the authors be held liable for any damages */
;/* arising from the use of this software. */
;/* */
;/* Permission is granted to anyone to use this software for any purpose, */
;/* including commercial applications, and to alter it and redistribute it */
;/* freely, subject to the following restrictions: */
;/* */
;/* 1. The origin of this software must not be misrepresented; you must not */
;/* claim that you wrote the original software. If you use this software */
;/* in a product, an acknowledgment in the product documentation would be */
;/* appreciated but is not required. */
;/* 2. Altered source versions must be plainly marked as such, and must not */
;/* be misrepresented as being the original software. */
;/* 3. This notice may not be removed or altered from any source */
;/* distribution. */
;/* */
;/*****************************************************************************/
;------------------------------------------------------------------------------
; The driver header
.struct EMD_HDR
ID .byte 3 ; Contains 0x65, 0x6d, 0x64 ("emd")
VERSION .byte 1 ; Interface version
LIBREF .addr ; Library reference
JUMPTAB .struct
INSTALL .addr ; INSTALL routine
UNINSTALL .addr ; UNINSTALL routine
PAGECOUNT .addr ; PAGECOUNT routine
MAP .addr ; MAP routine
USE .addr ; USE routine
MAPCLEAN .addr ; MAPCLEAN routine
COPYFROM .addr ; COPYFROM routine
COPYTO .addr ; COPYTO routine
.endstruct
.endstruct
;------------------------------------------------------------------------------
; The EMD API version, stored in EMD_HDR::VERSION
EMD_API_VERSION = $02
;------------------------------------------------------------------------------
; The asm equivalent to the C em_copy structure
.struct EM_COPY
BUF .addr ; Memory buffer to copy from or to
OFFS .byte ; Offset into page
PAGE .word ; Starting page to copy from or to
COUNT .word ; Number of bytes to copy
UNUSED .byte ; Make the size 8 bytes
.endstruct
;------------------------------------------------------------------------------
; Variables
.global _em_drv ; Pointer to driver
;------------------------------------------------------------------------------
; Driver entry points
.global emd_install
.global emd_uninstall
.global emd_pagecount
.global emd_map
.global emd_use
.global emd_commit
.global emd_copyfrom
.global emd_copyto
;------------------------------------------------------------------------------
; ASM functions
.global em_clear_ptr
;------------------------------------------------------------------------------
; C callable functions
.global _em_load_driver
.global _em_unload
.global _em_install
.global _em_uninstall
.global _em_pagecount
.global _em_map
.global _em_use
.global _em_commit
.global _em_copyfrom
.global _em_copyto