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Diffstat (limited to 'src/devices/sound/tms5220.cpp')
-rw-r--r--src/devices/sound/tms5220.cpp10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/devices/sound/tms5220.cpp b/src/devices/sound/tms5220.cpp
index d04069e50b9..033bd4551df 100644
--- a/src/devices/sound/tms5220.cpp
+++ b/src/devices/sound/tms5220.cpp
@@ -1129,6 +1129,9 @@ INT32 tms5220_device::lattice_filter()
m_u[2] = m_u[3] - matrix_multiply(m_current_k[2], m_x[2]);
m_u[1] = m_u[2] - matrix_multiply(m_current_k[1], m_x[1]);
m_u[0] = m_u[1] - matrix_multiply(m_current_k[0], m_x[0]);
+#ifdef DEBUG_LATTICE
+ INT32 err = m_x[9] + matrix_multiply(m_current_k[9], m_u[9]); //x_10, real chip doesn't use or calculate this
+#endif
m_x[9] = m_x[8] + matrix_multiply(m_current_k[8], m_u[8]);
m_x[8] = m_x[7] + matrix_multiply(m_current_k[7], m_u[7]);
m_x[7] = m_x[6] + matrix_multiply(m_current_k[6], m_u[6]);
@@ -1146,9 +1149,14 @@ INT32 tms5220_device::lattice_filter()
for (i = 9; i >= 0; i--)
{
fprintf(stderr,"Y%d:%04d ", i+1, m_u[i]);
+ }
+ fprintf(stderr,"\n");
+ fprintf(stderr,"E:%04d ", err);
+ for (i = 9; i >= 0; i--)
+ {
fprintf(stderr,"b%d:%04d ", i+1, m_x[i]);
- if ((i % 5) == 0) fprintf(stderr,"\n");
}
+ fprintf(stderr,"\n");
#endif
return m_u[0];
}