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Fix Mantis #01447

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Namcos22: prevent Prop Cycle analog controls from underflowing.
This commit is contained in:
R. Belmont 2008-10-12 02:00:52 +00:00
parent 864820d8ad
commit 876116276d
1 changed files with 7 additions and 2 deletions
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9
src/mame/drivers/namcos22.c
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@ -2576,8 +2576,13 @@ static READ8_HANDLER( propcycle_mcu_adc_r )
{
static UINT16 ddx, ddy;
ddx = ((input_port_read(machine, "STICKX")^0xff) - 1)<<2;
ddy = (input_port_read(machine, "STICKY") - 1)<<2;
ddx = input_port_read(machine, "STICKX")^0xff;
if (ddx > 0) ddx -= 1;
ddy = input_port_read(machine, "STICKY");
if (ddy > 0) ddy -= 1;
ddx <<= 2;
ddy <<= 2;
switch (offset)
{