make the code relocatable

[megadrive.git] / hexed / sega_gcc.s

        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 GENESIS                    "\r
        .ascii "hexed (c) notaz, 2009                           "\r
        .ascii "HEXED (C) NOTAZ, 2009                           "\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
	tst.l   0xa10008\r
	bne     SkipSetup\r
* Check Version Number\r
	move.b  (0xa10000),%d0\r
	andi.b  #0x0f,%d0\r
	beq     WrongVersion\r
* Sega Security Code (SEGA)\r
	move.l  #0x53454741,(0xa14000)\r
WrongVersion:\r
	moveq   #0,%d0\r
	movea.l %d0,%a7\r
	move    %a7,%usp\r
SkipSetup:\r
	tst.w   0xC00004\r
	bra     main\r
\r
* INT:\r
*	rte\r
\r
HBL:\r
	rte\r
\r
* VBL:\r
*	addq.l #1,(vtimer).l\r
*	rte\r
\r