diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/video/ataricommon/SDL_xbiosinterrupt.S')
| -rw-r--r-- | distrib/sdl-1.2.15/src/video/ataricommon/SDL_xbiosinterrupt.S | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/video/ataricommon/SDL_xbiosinterrupt.S b/distrib/sdl-1.2.15/src/video/ataricommon/SDL_xbiosinterrupt.S new file mode 100644 index 0000000..3fc1a60 --- /dev/null +++ b/distrib/sdl-1.2.15/src/video/ataricommon/SDL_xbiosinterrupt.S @@ -0,0 +1,212 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 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 +*/ + +/* + * XBIOS mouse & joystick vectors + * + * Patrice Mandin + */ + + .text + + .globl _SDL_AtariXbios_Install + .globl _SDL_AtariXbios_Restore + .globl _SDL_AtariXbios_MouseVector + .globl _SDL_AtariXbios_JoystickVector + + .globl _SDL_AtariXbios_mouselock + .globl _SDL_AtariXbios_mouseb + .globl _SDL_AtariXbios_mousex + .globl _SDL_AtariXbios_mousey + .globl _SDL_AtariXbios_joystick + +/*--- Vector installer ---*/ + +_SDL_AtariXbios_Install: + movel sp@(4),a0 + + /* Stop interrupts */ + + movew #0x2700,sr + + /* Save old mouse vector, set our routine */ + + clrl oldmousevector + movel sp@(8),d0 + beqs no_new_mouse_vector +#if defined(__mcoldfire__) + movel a0@(16),d1 + movel d1,oldmousevector +#else + movel a0@(16),oldmousevector +#endif + movel d0,a0@(16) +no_new_mouse_vector: + + /* Save old joystick vector, set our routine */ + + clrl oldjoystickvector + movel sp@(12),d0 + beqs no_new_joystick_vector +#if defined(__mcoldfire__) + movel a0@(24),d1 + movel d1,oldjoystickvector +#else + movel a0@(24),oldjoystickvector +#endif + movel d0,a0@(24) +no_new_joystick_vector: + + /* Restart interrupts */ + + movew #0x2300,sr + + rts + +/*--- Vector restorer ---*/ + +_SDL_AtariXbios_Restore: + movel sp@(4),a0 + + /* Stop interrupts */ + + movew #0x2700,sr + + /* Restore mouse vector */ + + movel oldmousevector,d0 + beqs no_restore_mouse + movel d0,a0@(16) +no_restore_mouse: + + /* Restore joystick vector */ + + movel oldjoystickvector,d0 + beqs no_restore_joystick + movel d0,a0@(24) +no_restore_joystick: + + /* Restart interrupts */ + + movew #0x2300,sr + + rts + +/*--- Our mouse vector ---*/ + + .text + .even + .ascii "XBRA" + .ascii "LSDL" + .comm oldmousevector,4*1 +_SDL_AtariXbios_MouseVector: +#if defined(__mcoldfire__) + lea sp@(-8),sp + moveml d0-d1,sp@ +#else + movel d0,sp@- +#endif + + /* Mouse buttons */ + moveb (a0),d0 +#if defined(__mcoldfire__) + andl #3,d0 +#else + andw #3,d0 +#endif + movew d0,_SDL_AtariXbios_mouseb + + /* X movement */ + moveb a0@(1),d0 + extw d0 +#if defined(__mcoldfire__) + movew _SDL_AtariXbios_mousex,d1 + addl d1,d0 + movew d0,_SDL_AtariXbios_mousex +#else + addw d0,_SDL_AtariXbios_mousex +#endif + + /* Y movement */ + moveb a0@(2),d0 + extw d0 +#if defined(__mcoldfire__) + movew _SDL_AtariXbios_mousey,d1 + addl d1,d0 + movew d0,_SDL_AtariXbios_mousey +#else + addw d0,_SDL_AtariXbios_mousey +#endif + + /* Lock mouse position ? */ + tstw _SDL_AtariXbios_mouselock + beq.s no_mouse_lock + clrb a0@(1) + clrb a0@(2) +no_mouse_lock: + + /* Jump through old vector */ +#if defined(__mcoldfire__) + moveml sp@,d0-d1 + lea sp@(8),sp +#else + movel sp@+,d0 +#endif + + movel oldmousevector,sp@- + rts + + .data + .even + .comm _SDL_AtariXbios_mouselock,2*1 + .comm _SDL_AtariXbios_mousex,2*1 + .comm _SDL_AtariXbios_mousey,2*1 + .comm _SDL_AtariXbios_mouseb,2*1 + +/*--- Our joystick vector ---*/ + + .text + .even + .ascii "XBRA" + .ascii "LSDL" + .comm oldjoystickvector,4*1 +_SDL_AtariXbios_JoystickVector: + movel d0,sp@- + + /* New joystick state */ + moveb a0@(2),d0 +#if defined(__mcoldfire__) + andl #0x8f,d0 +#else + andw #0x8f,d0 +#endif + movew d0,_SDL_AtariXbios_joystick + + /* Jump through old vector */ + movel sp@+,d0 + + movel oldjoystickvector,sp@- + rts + + .data + .even + .comm _SDL_AtariXbios_joystick,2*1 |