rts
+/* expects:
+ * a0 = #0xa10003
+ * d0 = #0
+ * d1 = #0x40
+ * trashes d2, d3
+ */
+sync_with_teensy:
+0: /* wait for special code */
+ move.b d1, (a0)
+ move.b (a0), d2
+ move.b d0, (a0)
+ move.b (a0), d3
+ and.b #0x3f, d2
+ cmp.b d2, d3
+ bne 0b
+ cmp.b #0x25, d2
+ bne 0b
+
+0: /* wait for special code to end */
+ cmp.b (a0), d2
+ beq 0b
+
+ move.b d1, (a0)
+ move.l #8000000/50/18, d2
+
+0: /* wait enough for teensy to setup it's stuff */
+ subq.l #1, d2 /* 8 */
+ bgt.s 0b /* 10 */
+
+ rts
+
+
+.macro t_nop
+ /*
+ * when communicating with 3.3V teensy:
+ * - no nops: see old value on multiple pins randomly
+ * - 1 nop: only TR often shows old value
+ * - 2 nops: ?
+ */
+ nop
+ nop
+.endm
+
+
+.global test_joy_read_log /* u8 *dest, int size, int do_sync */
+test_joy_read_log:
+ ldarg 0, 0, a1
+ ldarg 1, 0, d0
+ ldarg 2, 0, d1
+ movem.l d2-d7, -(sp)
+ movea.l #0xa10003, a0
+ move.l d0, d7
+ move.l d1, d6
+
+ moveq.l #0, d0
+ move.l #0x40, d1
+ move.b d1, (6,a0)
+ move.b d1, (a0)
+
+ tst.l d6
+ beq.s 2f
+ bsr sync_with_teensy
+
+2: /* save data */
+ move.b d0, (a0)
+ t_nop
+ move.b (a0), d2
+ move.b d1, (a0)
+ t_nop
+ move.b (a0), d3
+ move.b d0, (a0)
+ t_nop
+ move.b (a0), d4
+ move.b d1, (a0)
+ t_nop
+ move.b (a0), d5
+.if 0
+ /* broken on Mega-ED v9?? */
+ move.b d2, (a1)+
+ move.b d3, (a1)+
+ move.b d4, (a1)+
+ move.b d5, (a1)+
+.else
+ lsl.w #8, d2
+ move.b d3, d2
+ move.w d2, (a1)+
+ lsl.w #8, d4
+ move.b d5, d4
+ move.w d4, (a1)+
+.endif
+
+ /* delay for teensy, 128 not enough.. */
+ move.l #256, d2
+0:
+ dbra d2, 0b
+
+ subq.l #4, d7
+ bgt.s 2b
+
+ movem.l (sp)+, d2-d7
+ rts
+
+
+.global test_joy_read_log_vsync /* u8 *dest, int size */
+test_joy_read_log_vsync:
+ ldarg 0, 0, a1
+ ldarg 1, 0, d0
+ movem.l d2-d7/a2, -(sp)
+ movea.l #0xa10003, a0
+ movea.l #0xc00005, a2
+ move.l d0, d7
+
+ move.l #0x40, d1
+ moveq.l #0, d0
+ move.b d1, (6,a0)
+ move.b d1, (a0)
+
+ bsr sync_with_teensy
+
+2: /* save data */
+ move.b d0, (a0)
+ move.b (a0), d2
+ move.b d1, (a0)
+ move.b (a0), d3
+ move.b d2, (a1)+
+ move.b d3, (a1)+
+
+ /* wait for next vsync */
+ moveq.l #3, d2
+0:
+ btst d2, (a2)
+ bne.s 0b
+0:
+ btst d2, (a2)
+ beq.s 0b
+
+ subq.l #2, d7
+ bgt.s 2b
+
+ movem.l (sp)+, d2-d7/a2
+ rts
+
+
+.global test_byte_write /* u8 *dest, int size, int seed */
+test_byte_write:
+ ldarg 0, 0, a0
+ ldarg 1, 0, d0
+ ldarg 2, 0, d1
+ movem.l d2-d7, -(sp)
+
+ move.l a0, a1
+ add.l d0, a1
+ move.l d1, d7
+0:
+ move.b d7, d0
+ addq.b #1, d7
+ move.b d7, d1
+ addq.b #1, d7
+ move.b d7, d2
+ addq.b #1, d7
+ move.b d7, d3
+ addq.b #1, d7
+ move.b d7, d4
+ addq.b #1, d7
+ move.b d7, d5
+ addq.b #1, d7
+ move.b d7, d6
+ addq.b #1, d7
+
+ move.b d0, (a0)+
+ move.b d1, (a0)+
+ move.b d2, (a0)+
+ move.b d3, (a0)+
+ move.b d4, (a0)+
+ move.b d5, (a0)+
+ move.b d6, (a0)+
+ move.b d7, (a0)+
+ addq.b #1, d7
+ cmp.l a1, a0
+ blt.s 0b
+
+ movem.l (sp)+, d2-d7
+ rts
+
+
.global run_game /* u16 mapper, int tas_sync */
run_game:
move.w #0x2700, sr
ldarg 0, 0, d7
ldarg 1, 0, d6
- move.l #0xa10000, a6
- move.l #0xc00000, a5
- move.l #0xc00005, a4
- move.l #0xc00004, a3
- moveq.l #0x00, d2
+ movea.l #0xa10000, a6
+ movea.l #0xc00000, a5
+ movea.l #0xc00005, a4
+ movea.l #0xc00004, a3
+ moveq.l #0x00, d0
+ move.b #0x40, d1 /* d2 is tmp */
move.b #0xff, d3
- move.b #0x40, d4
- move.b d4, (0x09,a6) /* CtrlA */
- move.b d2, (0x0b,a6) /* CtrlB */
- move.b d2, (0x0d,a6) /* CtrlC */
- move.b d2, (0x13,a6) /* S-CtrlA */
+ move.b d1, (0x09,a6) /* CtrlA */
+ move.b d0, (0x0b,a6) /* CtrlB */
+ move.b d0, (0x0d,a6) /* CtrlC */
+ move.b d0, (0x13,a6) /* S-CtrlA */
move.b d3, (0x0f,a6) /* TxDataA */
- move.b d2, (0x19,a6) /* S-CtrlB */
+ move.b d0, (0x19,a6) /* S-CtrlB */
move.b d3, (0x15,a6) /* TxDataB */
- move.b d2, (0x1f,a6) /* S-CtrlC */
+ move.b d0, (0x1f,a6) /* S-CtrlC */
move.b d3, (0x1b,a6) /* TxDataC */
/* set up for vram write */
move.l #0x40000000, (a3)
move.l #0xff0000, a1
- move.l #0x10000/4/4-1, d0
+ move.l #0x10000/4/4-1, d2
0:
- move.l d2, (a1)+
- move.l d2, (a1)+
- move.l d2, (a1)+
- move.l d2, (a1)+
- dbra d0, 0b
-
- move.l #0xfffe00, a1
- tst.l d6
- bne use_tas_code
+ move.l d0, (a1)+
+ move.l d0, (a1)+
+ move.l d0, (a1)+
+ move.l d0, (a1)+
+ dbra d2, 0b
lea (run_game_r,pc), a0
- move.l #(run_game_r_end - run_game_r)/2-1, d0
- bra 0f
-use_tas_code:
- lea (run_game_r_tas,pc), a0
- move.l #(run_game_r_tas_end - run_game_r_tas)/2-1, d0
-
+ move.l #0xffff80, a1
+ move.l #(run_game_r_end - run_game_r)/2-1, d2
0:
move.w (a0)+, (a1)+
- dbra d0, 0b
- jmp 0xfffe00
+ dbra d2, 0b
-run_game_r:
- move.w #0x3210, (0xA13006)
-
- move.w d7, (0xA13010)
- move.w #0, (0xA13000)
-
- move.l (0x00), a7
- move.l (0x04), a0
- jmp (a0)
-run_game_r_end:
-
-run_game_r_tas:
- move.w #0x3210, (0xA13006)
- move.w d7, (0xA13010)
- move.w #0, (0xA13000)
-
- move.l (0x00), a7
- move.l (0x04), a0
-
-0: /* wait for special code */
- move.b d4, (0x03,a6)
- move.b (0x03,a6), d0
- move.b d2, (0x03,a6)
- move.b (0x03,a6), d1
- and.b #0x3f, d0
- cmp.b d0, d1
- bne 0b
- cmp.b #0x25, d0
- bne 0b
+ tst.l d6
+ beq.s 0f
-0: /* wait for special code to end */
- cmp.b (0x03,a6), d0
- beq 0b
+ movea.l #0xa10003, a0
+ movea.l d0, a7
+ bsr sync_with_teensy /* trashes d3 */
+ move.l d0, (-4,a7)
+0:
/* wait for active display */
- moveq.l #3, d0
+ moveq.l #3, d2
0:
- btst d0, (a4) /* 8 */
+ btst d2, (a4) /* 8 */
beq.s 0b /* 10 */
0:
- btst d0, (a4)
+ btst d2, (a4)
bne.s 0b
/* flood the VDP FIFO */
.rept 5
- move.w d2, (a5)
+ move.w d0, (a5)
.endr
- /* doesn't help.. */
-.if 0
-.rept 94
- nop
-.endr
- move.l #0x93049400, (a3) /* DMALEN LO/HI = 0x0008 */
- move.l #0x95009601, (a3) /* DMA SRC LO/MID */
- move.l #0x977f8114, (a3) /* DMA SRC HI/MODE, Turn off Display */
- move.l #0xc0000080, (a3) /* start DMA */
-.endif
+ movea.l d0, a0
+ movea.l #0xA13000, a1
+
+ move.b d0, (0x09,a6) /* CtrlA */
+ move.b d1, (0x03,a6)
+
+ jmp 0xffff80
+
+run_game_r:
+ move.w #0x3210, (0x06,a1) /* 0xA13006 */
+ move.w d7, (0x10,a1) /* 0xA13010 */
+ move.w d0, (a1) /* 0xA13000 */
+
+ move.l (a0)+, a7
+ move.l (a0), a0
- move.b d2, (0x09,a6) /* CtrlA */
- move.b d4, (0x03,a6)
jmp (a0)
-run_game_r_tas_end:
+run_game_r_end:
# vim:filetype=asmM68k:ts=4:sw=4:expandtab
notaz.gp2x.de / megadrive.git / blobdiff