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pla.c: Fixed MOS8721. (nw)

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This commit is contained in:
Curt Coder 2012-10-11 16:46:04 +00:00
parent 9afbd50a08
commit 13051a06b7
1 changed files with 15 additions and 4 deletions
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19
src/emu/machine/pla.c
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@ -30,8 +30,13 @@ const device_type MOS8721 = &device_creator<mos8721_device>;
inline void pla_device::parse_fusemap() inline void pla_device::parse_fusemap()
{ {
memory_region *region = machine().root_device().memregion(tag());
jed_data jed; jed_data jed;
jedbin_parse(machine().root_device().memregion(tag())->base(), machine().root_device().memregion(tag())->bytes(), &jed);
jedbin_parse(region->base(), region->bytes(), &jed);
//logerror("PLA '%s' %u fuses\n", tag(), jed.numfuses);
UINT32 fusenum = 0; UINT32 fusenum = 0;
m_xor = 0; m_xor = 0;
@ -51,12 +56,16 @@ inline void pla_device::parse_fusemap()
{ {
m_or[term] |= !jed_get_fuse(&jed, fusenum++) << f; m_or[term] |= !jed_get_fuse(&jed, fusenum++) << f;
} }
//logerror("PLA '%s' %3u COMP %08x TRUE %08x OR %08x\n", tag(), term, m_and_comp[term], m_and_true[term], m_or[term]);
} }
for (int f = 0; f < m_outputs; f++) for (int f = 0; f < m_outputs; f++)
{ {
m_xor |= jed_get_fuse(&jed, fusenum++) << f; m_xor |= jed_get_fuse(&jed, fusenum++) << f;
} }
//logerror("PLA '%s' XOR %08x\n", tag(), m_xor);
} }
@ -66,10 +75,12 @@ inline void pla_device::parse_fusemap()
inline bool pla_device::get_product(int term) inline bool pla_device::get_product(int term)
{ {
UINT32 input_true = m_and_true[term] | m_i;
UINT32 input_comp = m_and_comp[term] | ~m_i; UINT32 input_comp = m_and_comp[term] | ~m_i;
UINT32 input_true = m_and_true[term] | m_i;
return ((input_true & input_comp) & m_output_mask) == m_output_mask; //logerror("PLA '%s' %3u COMP %08x TRUE %08x OR %08x : %u\n", tag(), term, ~input_comp & m_output_mask, ~input_true & m_output_mask, m_or[term], (((input_comp & input_true) & m_output_mask) == m_output_mask));
return ((input_comp & input_true) & m_output_mask) == m_output_mask;
} }
@ -115,7 +126,7 @@ pls100_device::pls100_device(const machine_config &mconfig, const char *tag, dev
} }
mos8721_device::mos8721_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) mos8721_device::mos8721_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: pla_device(mconfig, MOS8721, "MOS8721", tag, owner, clock, 27, 18, 48, 0x7ffffff) : pla_device(mconfig, MOS8721, "MOS8721", tag, owner, clock, 27, 18, 379, 0x7ffffff) // TODO actual number of terms is unknown
{ {
} }