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identified upper bitmask bits (nw)

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This commit is contained in:
David Haywood 2013-08-03 03:38:11 +00:00
parent c7249e9faf
commit 63d85655b9
2 changed files with 26 additions and 1 deletions
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2
src/mame/includes/pgm.h
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@ -267,6 +267,8 @@ public:
int prev_tablloc;
int numbercolumns;
int depth;
UINT16 m_row_bitmask;
UINT8 coverage[256]; // coverage is how much of the table we've managed to verify using known facts about the table structure
int command_31_write_type;

25
src/mame/machine/pgmprot_igs027a_type1.c
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@ -1846,7 +1846,18 @@ DRIVER_INIT_MEMBER(pgm_arm_type1_state,espgal)
}
int count_bits(UINT16 value)
{
int count = 0;
for (int i=0;i<16;i++)
{
int bit = (value >> i) & 1;
if (bit) count++;
}
return count;
}
int pgm_arm_type1_state::puzzli2_take_leveldata_value(UINT8 datvalue)
{
@ -1862,6 +1873,7 @@ int pgm_arm_type1_state::puzzli2_take_leveldata_value(UINT8 datvalue)
prev_tablloc = 0;
numbercolumns = 0;
depth = 0;
m_row_bitmask = 0;
printf("%02x <- table offset\n", datvalue);
tableoffs = datvalue;
@ -1905,9 +1917,11 @@ int pgm_arm_type1_state::puzzli2_take_leveldata_value(UINT8 datvalue)
}
else if (stage==1)
{
printf("%02x <- Number of Entries for this Column (column is %d) (xor table location is %02x) ", rawvalue, currentcolumn, tableloc);
printf("%02x <- Number of Entries for this Column (and upper mask) (column is %d) (xor table location is %02x) ", rawvalue, currentcolumn, tableloc);
stage = 2;
entries_left = (rawvalue >> 4);
m_row_bitmask = (rawvalue & 0x0f)<<8;
full_entry = rawvalue;
prev_tablloc = tableloc;
@ -1929,6 +1943,13 @@ int pgm_arm_type1_state::puzzli2_take_leveldata_value(UINT8 datvalue)
printf("%02x <- Mask value equal to number of entries (xor table location is %02x)", rawvalue, tableloc);
stage = 3;
m_row_bitmask |= rawvalue;
int num_mask_bits = count_bits(m_row_bitmask);
if (num_mask_bits != num_entries)
printf(" error - number of mask bits != number of entries - ");
//
if (entries_left == 0)
{
@ -1936,6 +1957,7 @@ int pgm_arm_type1_state::puzzli2_take_leveldata_value(UINT8 datvalue)
stage = 1;
currentcolumn++;
currentrow = 0;
m_row_bitmask = 0;
coverage[tableloc] = 1;
if (rawvalue!=0)
@ -2071,6 +2093,7 @@ int pgm_arm_type1_state::puzzli2_take_leveldata_value(UINT8 datvalue)
stage = 1;
currentcolumn++;
currentrow = 0;
m_row_bitmask = 0;
if (currentcolumn==numbercolumns)
{