hexed/sega_gcc.s

   1         dc.l 0x0,0x200\r
   2         dc.l INT,INT,INT,INT,INT,INT,INT\r
   3         dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
   4         dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
   5         dc.l INT,INT,INT,HBL,INT,VBL,INT,INT\r
   6         dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
   7         dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
   8         dc.l INT,INT,INT,INT,INT,INT,INT,INT\r
   9         dc.l INT,INT,INT,INT,INT,INT,INT\r
  10         .ascii "SEGA GENESIS                    "\r
  11         .ascii "hexed (c) notaz, 2009                           "\r
  12         .ascii "HEXED (C) NOTAZ, 2009                           "\r
  13         .ascii "GM 00000000-00"\r
  14         .byte 0x00,0x00\r
  15         .ascii "JD              "\r
  16         .byte 0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00\r
  17         .byte 0x00,0xff,0x00,0x00,0xff,0xff,0xff,0xff\r
  18         .ascii "               "\r
  19         .ascii "                        "\r
  20         .ascii "                         "\r
  21         .ascii "JUE             "\r
  22 \r
  23         tst.l   0xa10008\r
  24         bne     SkipSetup\r
  25 * Check Version Number\r
  26         move.b  (0xa10000),%d0\r
  27         andi.b  #0x0f,%d0\r
  28         beq     WrongVersion\r
  29 * Sega Security Code (SEGA)\r
  30         move.l  #0x53454741,(0xa14000)\r
  31 WrongVersion:\r
  32         moveq   #0,%d0\r
  33         movea.l %d0,%a7\r
  34         move    %a7,%usp\r
  35 SkipSetup:\r
  36         tst.w   0xC00004\r
  37         bra     main\r
  38 \r
  39 * INT:\r
  40 *       rte\r
  41 \r
  42 HBL:\r
  43         rte\r
  44 \r
  45 * VBL:\r
  46 *       addq.l #1,(vtimer).l\r
  47 *       rte\r
  48 \r