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[Core/VDP] minor code cleanup

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This commit is contained in:
EkeEke 2013-06-30 13:08:44 +02:00
parent 091a0615f5
commit 5ee0d975dd
1 changed files with 11 additions and 11 deletions
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22
core/vdp_ctrl.c
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@ -1363,14 +1363,9 @@ unsigned int vdp_hvc_r(unsigned int cycles)
unsigned int data = hvc_latch;
/* Check if HVC latch is enabled */
if (!data)
if (data)
{
/* Cycle-accurate HCounter (Striker, Mickey Mania, Skitchin, Road Rash I,II,III, Sonic 3D Blast...) */
data = hctab[cycles % MCYCLES_PER_LINE];
}
else
{
/* Mode 5: H & V counters are frozen (cf. lightgun games, Sunset Riders logo) */
/* Mode 5: HV-counters are frozen (cf. lightgun games, Sunset Riders logo) */
if (reg[1] & 0x04)
{
#ifdef LOGVDP
@ -1381,15 +1376,20 @@ unsigned int vdp_hvc_r(unsigned int cycles)
}
else
{
/* Mode 4: by default, V counter runs normally & H counter is frozen */
/* Mode 4: by default, V-counter runs normally & H counter is frozen */
data &= 0xff;
}
}
else
{
/* Cycle-accurate H-Counter (Striker, Mickey Mania, Skitchin, Road Rash I,II,III, Sonic 3D Blast...) */
data = hctab[cycles % MCYCLES_PER_LINE];
}
/* Cycle-accurate VCounter (cycle counter starts from line -1) */
/* Cycle-accurate V-Counter (cycle counter starts from line -1) */
vc = (cycles / MCYCLES_PER_LINE) - 1;
/* VCounter overflow */
/* V-Counter overflow */
if (vc > vc_max)
{
vc -= lines_per_frame;
@ -1405,7 +1405,7 @@ unsigned int vdp_hvc_r(unsigned int cycles)
vc = (vc & ~1) | ((vc >> 8) & 1);
}
/* return HCounter in LSB & VCounter in MSB */
/* return H-Counter in LSB & V-Counter in MSB */
data |= ((vc & 0xff) << 8);
#ifdef LOGVDP