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https://github.com/cc65/cc65.git
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dacee3b9ed
All but one TGI drivers didn't use IRQs. Especially when the TGI driver kernel was the only .interruptor this meant quite some unnecessary overhead because it pulled in the whole IRQ infrastructure. The one driver using IRQs (the graphics driver for the 160x102x16 mode on the Lynx) now uses a library reference to set up a JMP to its IRQ handler.
234 lines
10 KiB
PHP
234 lines
10 KiB
PHP
;*****************************************************************************/
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;* */
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;* tgi-kernel.inc */
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;* */
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;* TGI kernel interface */
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;* */
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;* */
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;* */
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;* (C) 2002-2012, Ullrich von Bassewitz */
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;* Roemerstrasse 52 */
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;* D-70794 Filderstadt */
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;* EMail: uz@cc65.org */
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;* */
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;* */
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;* This software is provided 'as-is', without any expressed or implied */
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;* warranty. In no event will the authors be held liable for any damages */
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;* arising from the use of this software. */
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;* */
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;* Permission is granted to anyone to use this software for any purpose, */
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;* including commercial applications, and to alter it and redistribute it */
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;* freely, subject to the following restrictions: */
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;* */
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;* 1. The origin of this software must not be misrepresented; you must not */
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;* claim that you wrote the original software. If you use this software */
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;* in a product, an acknowledgment in the product documentation would be */
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;* appreciated but is not required. */
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;* 2. Altered source versions must be plainly marked as such, and must not */
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;* be misrepresented as being the original software. */
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;* 3. This notice may not be removed or altered from any source */
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;* distribution. */
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;* */
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;*****************************************************************************/
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;------------------------------------------------------------------------------
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; The driver header
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.struct TGI_HDR
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ID .byte 3 ; Contains 0x74, 0x67, 0x69 ("tgi")
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VERSION .byte 1 ; Interface version
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LIBREF .addr ; Library reference
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VARS .struct
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XRES .word 1 ; X resolution
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YRES .word 1 ; Y resolution
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COLORCOUNT .byte 1 ; Number of available colors
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PAGECOUNT .byte 1 ; Number of screens available
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FONTWIDTH .byte 1 ; System font width in pixel
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FONTHEIGHT .byte 1 ; System font height in pixel
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ASPECTRATIO .word 1 ; Fixed point 8.8 format
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FLAGS .byte 1 ; TGI driver flags
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.endstruct
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JUMPTAB .struct
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INSTALL .addr ; INSTALL routine
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UNINSTALL .addr ; UNINSTALL routine
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INIT .addr ; INIT routine
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DONE .addr ; DONE routine
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GETERROR .addr ; GETERROR routine
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CONTROL .addr ; CONTROL routine
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CLEAR .addr ; CLEAR routine
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SETVIEWPAGE .addr ; SETVIEWPAGE routine
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SETDRAWPAGE .addr ; SETDRAWPAGE routine
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SETCOLOR .addr ; SETCOLOR routine
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SETPALETTE .addr ; SETPALETTE routine
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GETPALETTE .addr ; GETPALETTE routine
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GETDEFPALETTE .addr ; GETDEFPALETTE routine
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SETPIXEL .addr ; SETPIXEL routine
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GETPIXEL .addr ; GETPIXEL routine
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LINE .addr ; LINE routine
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BAR .addr ; BAR routine
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TEXTSTYLE .addr ; TEXTSTYLE routine
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OUTTEXT .addr ; OUTTEXT routine
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.endstruct
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.endstruct
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;------------------------------------------------------------------------------
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; The TGI API version, stored at TGI_HDR_VERSION
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TGI_API_VERSION = $06
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;------------------------------------------------------------------------------
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; Bitmapped tgi driver flags, stored in TGI_HDR::VARS::FLAGS.
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; Beware: Some of the bits are tested using the BIT instruction, so do not
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; change the values without checking the code!
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TGI_BM_FONT_FINESCALE = $80 ; Bitmap fonts are fine grained scalable
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;------------------------------------------------------------------------------
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; Text constants
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TGI_FONT_BITMAP = 0
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TGI_FONT_VECTOR = 1
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TGI_TEXT_HORIZONTAL = 0
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TGI_TEXT_VERTICAL = 1
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;----------------------------------------------------------------------------
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; Results of tgi_outcode
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TGI_CLIP_NONE = $00
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TGI_CLIP_LEFT = $01
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TGI_CLIP_RIGHT = $02
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TGI_CLIP_BOTTOM = $04
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TGI_CLIP_TOP = $08
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;------------------------------------------------------------------------------
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; ASM accessible color constants
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.global tgi_color_black:zp ; Target-specific value for black
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.global tgi_color_white:zp ; Target-specific value for white
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;------------------------------------------------------------------------------
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; C accessible variables
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.global _tgi_drv ; Pointer to driver
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.global _tgi_error ; Last error code
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.global _tgi_gmode ; Flag: graphics mode active
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.global _tgi_curx ; Current drawing cursor X
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.global _tgi_cury ; Current drawing cursor Y
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.global _tgi_color ; Current drawing color
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.global _tgi_font ; Which font to use
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.global _tgi_textdir ; Current text direction
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.global _tgi_vectorfont ; Pointer to vector font
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.global _tgi_textscalew ; Text magnification for the width
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.global _tgi_textscaleh ; Text magnification for the height
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.global _tgi_charwidth ; Width of scaled system font char
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.global _tgi_charheight ; Height of scaled system font char
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.global _tgi_xres ; X resolution of the current mode
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.global _tgi_yres ; Y resolution of the current mode
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.global _tgi_xmax ; Maximum X coordinate
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.global _tgi_ymax ; Maximum Y coordinate
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.global _tgi_colorcount ; Number of available colors
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.global _tgi_pagecount ; Number of available screen pages
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.global _tgi_fontwidth ; System font width
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.global _tgi_fontheight ; System font height
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.global _tgi_aspectratio ; Aspect ratio, fixed point 8.8
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.global _tgi_flags ; TGI driver flags
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;------------------------------------------------------------------------------
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; ASM accessible variables
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.global tgi_clip_x1 ; Coordinate for line clipper
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.global tgi_clip_y1 ; Coordinate for line clipper
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.global tgi_clip_x2 ; Coordinate for line clipper
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.global tgi_clip_y2 ; Coordinate for line clipper
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;------------------------------------------------------------------------------
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; Driver entry points
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.global tgi_install
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.global tgi_uninstall
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.global tgi_init
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.global tgi_done
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.global tgi_geterror
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.global tgi_control
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.global tgi_clear
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.global tgi_setviewpage
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.global tgi_setdrawpage
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.global tgi_setcolor
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.global tgi_setpalette
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.global tgi_getpalette
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.global tgi_getdefpalette
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.global tgi_setpixel
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.global tgi_getpixel
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.global tgi_line
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.global tgi_bar
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.global tgi_textstyle
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.global tgi_outtext
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;------------------------------------------------------------------------------
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; ASM functions
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.global tgi_clear_ptr
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.global tgi_clippedline
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.global tgi_curtoxy
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.global tgi_getset
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.global tgi_imulround
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.global tgi_inv_arg
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.global tgi_inv_drv
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.global tgi_linepop
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.global tgi_outcode
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.global tgi_popxy
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.global tgi_popxy2
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.global tgi_set_ptr
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;------------------------------------------------------------------------------
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; C callable functions
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.global _tgi_arc
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.global _tgi_bar
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.global _tgi_circle
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.global _tgi_clear
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.global _tgi_done
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.global _tgi_ellipse
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.global _tgi_getaspectratio
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.global _tgi_getcolor
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.global _tgi_getcolorcount
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.global _tgi_getdefpalette
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.global _tgi_geterror
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.global _tgi_geterrormsg
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.global _tgi_getmaxcolor
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.global _tgi_getmaxx
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.global _tgi_getmaxy
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.global _tgi_getpagecount
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.global _tgi_getpalette
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.global _tgi_getpixel
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.global _tgi_gettextheight
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.global _tgi_gettextwidth
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.global _tgi_getxres
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.global _tgi_getyres
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.global _tgi_gotoxy
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.global _tgi_imulround
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.global _tgi_init
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.global _tgi_install
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.global _tgi_install_vectorfont
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.global _tgi_ioctl
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.global _tgi_line
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.global _tgi_lineto
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.global _tgi_load_driver
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.global _tgi_outtext
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.global _tgi_outtextxy
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.global _tgi_pieslice
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.global _tgi_setaspectratio
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.global _tgi_setcolor
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.global _tgi_setdrawpage
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.global _tgi_setpalette
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.global _tgi_setpixel
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.global _tgi_settextdir
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.global _tgi_settextscale
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.global _tgi_settextstyle
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.global _tgi_setviewpage
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.global _tgi_uninstall
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.global _tgi_unload
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