- dc.l 0x0,0x200\r
- dc.l INT,INT,INT,INT,INT,INT,INT\r
- dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
- dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
- dc.l INT,INT,INT,HBL,INT,VBL,INT,INT\r
- dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
- dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
- dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
- dc.l INT,INT,INT,INT,INT,INT,INT\r
- .ascii "SEGA EVERDRIVE "\r
- .ascii "MEGA-ED host "\r
- .ascii "MEGA-ED host "\r
- .ascii "GM 00000000-00"\r
- .byte 0x00,0x00\r
- .ascii "JD "\r
- .byte 0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00\r
- .byte 0x00,0xff,0x00,0x00,0xff,0xff,0xff,0xff\r
- .ascii " "\r
- .ascii " "\r
- .ascii " "\r
- .ascii "JUE "\r
+exc_tab:\r
+ dc.l 0, 0x200, exc02, exc03, exc04, exc05, exc06, exc07\r
+ dc.l exc08, exc09, exc0a, exc0b, exc0c, exc0d, exc0e, exc0f\r
+ dc.l exc10, exc11, exc12, exc13, exc14, exc15, exc16, exc17\r
+ dc.l exc18, exc19, exc1a, exc1b, HBL, exc1d, VBL, exc1f\r
+ dc.l exc20, exc21, exc22, exc23, exc24, exc25, exc26, exc27\r
+ dc.l exc28, exc29, exc2a, exc2b, exc2c, exc2d, exc2e, exc2f\r
+ dc.l exc30, exc31, exc32, exc33, exc34, exc35, exc3e, exc37\r
+ dc.l exc38, exc39, exc3a, exc3b, exc3c, exc3d, exc3e, exc3f\r
+\r
+ .ascii "SEGA EVERDRIVE "\r
+ .ascii "MEGA-ED host "\r
+ .ascii "MEGA-ED host "\r
+ .ascii "GM 00000000-00"\r
+ .byte 0x00,0x00\r
+ .ascii "JD "\r
+ .byte 0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00\r
+ .byte 0x00,0xff,0x00,0x00,0xff,0xff,0xff,0xff\r
+ .ascii " "\r
+ .ascii " "\r
+ .ascii " "\r
+ .ascii "JUE "\r
\r
-/* magic ED app init */\r
RST:\r
+ move.w (0xc00008), start_hvc\r
+ move.w #0x2700, %sr\r
+/* magic ED app init */\r
move.w #0x0000, (0xA13006)\r
jmp init_ed.l\r
init_ed:\r
- move.w #0x210f, (0xA13006)\r
- move.l #HBL, (0x70)\r
- move.l #VBL, (0x78)\r
+/* relocate to bank a, so that other ROMs can be loaded */\r
+ move.w #0x0a0f, (0xA13006)\r
+ movea.l #0x100000, %a0\r
+ movea.l #0x200000, %a1\r
+ move.l #0x100000/4/4-1, %d0\r
+0:\r
+ move.l (a0)+, (a1)+\r
+ move.l (a0)+, (a1)+\r
+ move.l (a0)+, (a1)+\r
+ move.l (a0)+, (a1)+\r
+ dbra %d0, 0b\r
\r
- moveq #0,%d0\r
- movea.l %d0,%a7\r
- move %a7,%usp\r
- bra main\r
+ move.w #0x10af, (0xA13006)\r
\r
-INT:\r
- movem.l %d0-%d1/%a0-%a1,-(%sp)\r
- jsr exception\r
- movem.l (%sp)+,%d0-%d1/%a0-%a1\r
- rte\r
+ lea exc_tab, %a0\r
+ adda.l #4*2, %a0\r
+ movea.l #4*2, %a1\r
+ move.l #64-2-1, %d0\r
+0:\r
+ move.l (a0)+, (a1)+\r
+ dbra %d0, 0b\r
+\r
+ moveq #0, %d0\r
+ movea.l %d0, %a7\r
+ move %a7, %usp\r
+ move.w #0x2000, %sr\r
+ bra main\r
\r
HBL:\r
rte\r
movem.l (%sp)+,%d0-%d1/%a0-%a1\r
rte\r
\r
+pre_exception:\r
+ move.w #0x2700, %sr\r
+ movem.l %d0-%d7/%a0-%a7,-(%sp)\r
+ move.l %sp, %d0\r
+ move.l %d0,-(%sp)\r
+ jsr exception\r
+0:\r
+ bra 0b\r
+\r
\r
* Standard 32X startup code for MD side at 0x3F0\r
.org 0x3F0\r
.word 0xFFC0,0x4CD6,0x7FF9,0x44FC,0x0000,0x6014,0x43F9,0x00A1\r
.word 0x5100,0x3340,0x0006,0x303C,0x8000,0x6004,0x44FC,0x0001\r
\r
+.macro exc_stub num\r
+exc\num:\r
+ move.w #0x\num, -(%sp)\r
+ jmp pre_exception\r
+.endm\r
+\r
+exc_stub 02\r
+exc_stub 03\r
+exc_stub 04\r
+exc_stub 05\r
+exc_stub 06\r
+exc_stub 07\r
+exc_stub 08\r
+exc_stub 09\r
+exc_stub 0a\r
+exc_stub 0b\r
+exc_stub 0c\r
+exc_stub 0d\r
+exc_stub 0e\r
+exc_stub 0f\r
+exc_stub 10\r
+exc_stub 11\r
+exc_stub 12\r
+exc_stub 13\r
+exc_stub 14\r
+exc_stub 15\r
+exc_stub 16\r
+exc_stub 17\r
+exc_stub 18\r
+exc_stub 19\r
+exc_stub 1a\r
+exc_stub 1b\r
+# exc_stub 1c\r
+exc_stub 1d\r
+# exc_stub 1e\r
+exc_stub 1f\r
+exc_stub 20\r
+exc_stub 21\r
+exc_stub 22\r
+exc_stub 23\r
+exc_stub 24\r
+exc_stub 25\r
+exc_stub 26\r
+exc_stub 27\r
+exc_stub 28\r
+exc_stub 29\r
+exc_stub 2a\r
+exc_stub 2b\r
+exc_stub 2c\r
+exc_stub 2d\r
+exc_stub 2e\r
+exc_stub 2f\r
+exc_stub 30\r
+exc_stub 31\r
+exc_stub 32\r
+exc_stub 33\r
+exc_stub 34\r
+exc_stub 35\r
+exc_stub 36\r
+exc_stub 37\r
+exc_stub 38\r
+exc_stub 39\r
+exc_stub 3a\r
+exc_stub 3b\r
+exc_stub 3c\r
+exc_stub 3d\r
+exc_stub 3e\r
+exc_stub 3f\r
+\r
+.bss\r
+.align 2\r
+.global start_hvc\r
+start_hvc:\r
+ .word 0\r
+\r
+# vim:filetype=asmM68k:ts=4:sw=4:expandtab\r
notaz.gp2x.de / megadrive.git / blobdiff