Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer
Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/*
* VBL queue routine
*
* Patrice Mandin
*/
#define _vbl_queue 0x456
#define _hz_200 0x4ba
.text
.globl _SDL_AtariVblInstall
.globl _SDL_AtariVblUninstall
.globl _SDL_MintAudio_hasfpu
/*--- Vector installer ---*/
_SDL_AtariVblInstall:
movel sp@(4),my_vector
lea _my_vbl,a0
clrw vbl_mutex
movel _hz_200.w, _SDL_Atari_hz200
/* Stop interrupts */
movew #0x2700,sr
/* Read vbl_queue pointer */
movel _vbl_queue.w,a1
/* Search a free place */
moveq #7,d0
bcl_search_place:
movel (a1),d1
beqs place_found
addql #4,a1
dbra d0,bcl_search_place
/* Not found */
moveq #1,d0
bras exit_vbl_queue
/* Then install ourselves */
place_found:
movel a0,(a1)
moveq #0,d0
exit_vbl_queue:
/* Restart interrupts */
movew #0x2300,sr
rts
/*--- Vector uninstaller ---*/
_SDL_AtariVblUninstall:
movel sp@(4),d0
cmpl my_vector,d0
bnes badvector
movel #_my_vbl,d0
/* Stop interrupts */
movew #0x2700,sr
/* Read vbl_queue pointer */
movel _vbl_queue.w,a1
/* Search where we are */
moveq #7,d1
bcl2_search_place:
cmpl (a1),d0
bnes next_place
clrl (a1)
moveq #0,d1
next_place:
addql #4,a1
dbra d1,bcl2_search_place
/* Restart interrupts */
movew #0x2300,sr
badvector:
rts
/*--- Our vbl ---*/
_my_vbl:
/* Update _hz_200 */
movel _hz_200.w, _SDL_Atari_hz200
/* Verify if this is not already running */
tstw vbl_mutex
bnes vbl_end
notw vbl_mutex
moveml d0-d7/a0-a6,sp@-
/* Save FPU if needed */
tstw _SDL_MintAudio_hasfpu
beqs SDL_AtariVbl_nofpu1
.chip 68060
fsave sp@-
fmoveml fpcr/fpsr/fpiar,sp@-
fmovemx fp0-fp7,sp@-
.chip 68000
SDL_AtariVbl_nofpu1:
movel my_vector,a0
jsr a0@
/* Restore FPU if needed */
tstw _SDL_MintAudio_hasfpu
beqs SDL_AtariVbl_Xbios_nofpu2
.chip 68060
fmovemx sp@+,fp0-fp7
fmoveml sp@+,fpcr/fpsr/fpiar
frestore sp@+
.chip 68000
SDL_AtariVbl_Xbios_nofpu2:
moveml sp@+,d0-d7/a0-a6
clrw vbl_mutex
vbl_end:
rts
.data
.even
.comm _SDL_Atari_hz200,4*1
.even
.comm vbl_mutex,2*1
.even
.comm my_vector,4*1