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 "notaz's Shadow / Hilight test "\r
- .ascii "NOTAZ'S SHADOW HILIGHT TEST "\r
+ .ascii "hexed (c) notaz, 2009 "\r
+ .ascii "HEXED (C) NOTAZ, 2009 "\r
.ascii "GM 00000000-00"\r
- .byte 0xa5,0xfb\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
/* addq.l #1,htimer */\r
rte\r
\r
-VBL:\r
- /* addq.l #1,vtimer */\r
- move.l #vtimer,a0\r
- addq.l #1,(a0)\r
- rte\r
-\r
-*------------------------------------------------\r
-*\r
-* Get a random number. This routine\r
-* was found in TOS.\r
-*\r
-* Output\r
-* ------\r
-* d0 = random number\r
-*\r
-*------------------------------------------------\r
-\r
- .globl random\r
-\r
-random:\r
- move.l rand_num,%d0\r
- tst.l %d0\r
- bne .L1\r
- moveq #16,%d1\r
- lsl.l %d1,%d0\r
- or.l htimer,%d0\r
- move.l %d0,rand_num\r
-.L1:\r
- move.l #-1153374675,-(%sp)\r
- move.l rand_num,-(%sp)\r
- bsr lmul\r
- addq.w #8,%sp\r
- addq.l #1,%d0\r
- move.l %d0,rand_num\r
-\r
- lsr.l #8,%d0\r
- and.l #16777215,%d0\r
- rts\r
-\r
-\r
-*------------------------------------------------\r
-*\r
-* Copyright (c) 1988 by Sozobon, Limited. Author: Johann Ruegg\r
-*\r
-* Permission is granted to anyone to use this software for any purpose\r
-* on any computer system, and to redistribute it freely, with the\r
-* following restrictions:\r
-* 1) No charge may be made other than reasonable charges for reproduction.\r
-* 2) Modified versions must be clearly marked as such.\r
-* 3) The authors are not responsible for any harmful consequences\r
-* of using this software, even if they result from defects in it.\r
-*\r
-*------------------------------------------------\r
-\r
-ldiv:\r
- move.l 4(%a7),%d0\r
- bpl ld1\r
- neg.l %d0\r
-ld1:\r
- move.l 8(%a7),%d1\r
- bpl ld2\r
- neg.l %d1\r
- eor.b #0x80,4(%a7)\r
-ld2:\r
- bsr i_ldiv /* d0 = d0/d1 */\r
- tst.b 4(%a7)\r
- bpl ld3\r
- neg.l %d0\r
-ld3:\r
- rts\r
-\r
-lmul:\r
- move.l 4(%a7),%d0\r
- bpl lm1\r
- neg.l %d0\r
-lm1:\r
- move.l 8(%a7),%d1\r
- bpl lm2\r
- neg.l %d1\r
- eor.b #0x80,4(%a7)\r
-lm2:\r
- bsr i_lmul /* d0 = d0*d1 */\r
- tst.b 4(%a7)\r
- bpl lm3\r
- neg.l %d0\r
-lm3:\r
- rts\r
-\r
-lrem:\r
- move.l 4(%a7),%d0\r
- bpl lr1\r
- neg.l %d0\r
-lr1:\r
- move.l 8(%a7),%d1\r
- bpl lr2\r
- neg.l %d1\r
-lr2:\r
- bsr i_ldiv /* d1 = d0%d1 */\r
- move.l %d1,%d0\r
- tst.b 4(%a7)\r
- bpl lr3\r
- neg.l %d0\r
-lr3:\r
- rts\r
+* VBL:\r
+* addq.l #1,(vtimer).l\r
+* rte\r
\r
-ldivu:\r
- move.l 4(%a7),%d0\r
- move.l 8(%a7),%d1\r
- bsr i_ldiv\r
- rts\r
-\r
-lmulu:\r
- move.l 4(%a7),%d0\r
- move.l 8(%a7),%d1\r
- bsr i_lmul\r
- rts\r
-\r
-lremu:\r
- move.l 4(%a7),%d0\r
- move.l 8(%a7),%d1\r
- bsr i_ldiv\r
- move.l %d1,%d0\r
- rts\r
-*\r
-* A in d0, B in d1, return A*B in d0\r
-*\r
-i_lmul:\r
- move.l %d3,%a2 /* save d3 */\r
- move.w %d1,%d2\r
- mulu %d0,%d2 /* d2 = Al * Bl */\r
-\r
- move.l %d1,%d3\r
- swap %d3\r
- mulu %d0,%d3 /* d3 = Al * Bh */\r
-\r
- swap %d0\r
- mulu %d1,%d0 /* d0 = Ah * Bl */\r
-\r
- add.l %d3,%d0 /* d0 = (Ah*Bl + Al*Bh) */\r
- swap %d0\r
- clr.w %d0 /* d0 = (Ah*Bl + Al*Bh) << 16 */\r
-\r
- add.l %d2,%d0 /* d0 = A*B */\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
-*\r
-*A in d0, B in d1, return A/B in d0, A%B in d1\r
-*\r
-i_ldiv:\r
- tst.l %d1\r
- bne nz1\r
-\r
-* divide by zero\r
-* divu #0,%d0 /* cause trap */\r
- move.l #0x80000000,%d0\r
- move.l %d0,%d1\r
- rts\r
-nz1:\r
- move.l %d3,%a2 /* save d3 */\r
- cmp.l %d1,%d0\r
- bhi norm\r
- beq is1\r
-* A<B, so ret 0, rem A\r
- move.l %d0,%d1\r
- clr.l %d0\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
-* A==B, so ret 1, rem 0\r
-is1:\r
- moveq.l #1,%d0\r
- clr.l %d1\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
-* A>B and B is not 0\r
-norm:\r
- cmp.l #1,%d1\r
- bne not1\r
-* B==1, so ret A, rem 0\r
- clr.l %d1\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
-* check for A short (implies B short also)\r
-not1:\r
- cmp.l #0xffff,%d0\r
- bhi slow\r
-* A short and B short -- use 'divu'\r
- divu %d1,%d0 /* d0 = REM:ANS */\r
- swap %d0 /* d0 = ANS:REM */\r
- clr.l %d1\r
- move.w %d0,%d1 /* d1 = REM */\r
- clr.w %d0\r
- swap %d0\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
-* check for B short\r
-slow:\r
- cmp.l #0xffff,%d1\r
- bhi slower\r
-* A long and B short -- use special stuff from gnu\r
- move.l %d0,%d2\r
- clr.w %d2\r
- swap %d2\r
- divu %d1,%d2 /* d2 = REM:ANS of Ahi/B */\r
- clr.l %d3\r
- move.w %d2,%d3 /* d3 = Ahi/B */\r
- swap %d3\r
-\r
- move.w %d0,%d2 /* d2 = REM << 16 + Alo */\r
- divu %d1,%d2 /* d2 = REM:ANS of stuff/B */\r
-\r
- move.l %d2,%d1\r
- clr.w %d1\r
- swap %d1 /* d1 = REM */\r
-\r
- clr.l %d0\r
- move.w %d2,%d0\r
- add.l %d3,%d0 /* d0 = ANS */\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
-* A>B, B > 1\r
-slower:\r
- move.l #1,%d2\r
- clr.l %d3\r
-moreadj:\r
- cmp.l %d0,%d1\r
- bhs adj\r
- add.l %d2,%d2\r
- add.l %d1,%d1\r
- bpl moreadj\r
-* we shifted B until its >A or sign bit set\r
-* we shifted #1 (d2) along with it\r
-adj:\r
- cmp.l %d0,%d1\r
- bhi ltuns\r
- or.l %d2,%d3\r
- sub.l %d1,%d0\r
-ltuns:\r
- lsr.l #1,%d1\r
- lsr.l #1,%d2\r
- bne adj\r
-* d3=answer, d0=rem\r
- move.l %d0,%d1\r
- move.l %d3,%d0\r
- move.l %a2,%d3 /* restore d3 */\r
- rts\r
*---------------------------------------------------------- \r
*\r
* Z80 Sound Driver\r
notaz.gp2x.de / megadrive.git / blobdiff