em-kernel.inc

6502 c compiler free open source

;/*****************************************************************************/
;/*                                                                           */
;/*                              em-kernel.inc                                */
;/*                                                                           */
;/*                           EM kernel interface                             */
;/*                                                                           */
;/*                                                                           */
;/*                                                                           */
;/* (C) 2002-2003 Ullrich von Bassewitz                                       */
;/*               R鰉erstrasse 52                                             */
;/*               D-70794 Filderstadt                                         */
;/* EMail:        [e-mail]                                                 */
;/*                                                                           */
;/*                                                                           */
;/* 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
	JUMPTAB .struct
	    INSTALL	.word	; INSTALL routine
	    UNINSTALL	.word	; UNINSTALL routine
	    PAGECOUNT	.word	; PAGECOUNT routine
	    MAP	.word	; MAP routine
	    USE	.word	; USE routine
	    MAPCLEAN	.word	; MAPCLEAN routine
	    COPYFROM	.word	; COPYFROM routine
	    COPYTO	.word	; COPYTO routine
	.endstruct
.endstruct

;------------------------------------------------------------------------------
; The EMD API version, stored in EMD_HDR::VERSION

EMD_API_VERSION         = $00

;------------------------------------------------------------------------------
; The asm equivalent to the C em_copy structure

.struct	EM_COPY
	BUF	.word		; 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_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