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thayers: led display DA3 is not connected (fixes possible crash)

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This commit is contained in:
hap 2024-02-03 15:03:10 +01:00
parent e00e8b3f64
commit 0396abe2af
1 changed files with 6 additions and 25 deletions
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31
src/mame/misc/thayers.cpp
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@ -119,10 +119,7 @@ private:
void laserdisc_data_w(u8 data);
void laserdisc_control_w(u8 data);
void den1_w(u8 data);
void den2_w(u8 data);
static constexpr u8 LED_MAP[16] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7c, 0x07, 0x7f, 0x67, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x00 };
void den_w(offs_t offset, u8 data);
};
void thayers_state::machine_start()
@ -496,7 +493,7 @@ void thayers_state::laserdisc_control_w(u8 data)
}
}
void thayers_state::den1_w(u8 data)
void thayers_state::den_w(offs_t offset, u8 data)
{
// bit description
//
@ -507,25 +504,10 @@ void thayers_state::den1_w(u8 data)
// 4 DA0
// 5 DA1
// 6 DA2
// 7 DA3
// 7 N/C
m_digits[data >> 4] = LED_MAP[data & 0x0f];
}
void thayers_state::den2_w(u8 data)
{
// bit description
//
// 0 DD0
// 1 DD1
// 2 DD2
// 3 DD3
// 4 DA0
// 5 DA1
// 6 DA2
// 7 DA3
m_digits[8 + (data >> 4)] = LED_MAP[data & 0x0f];
static constexpr u8 LED_MAP[16] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7c, 0x07, 0x7f, 0x67, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x00 };
m_digits[(offset * 8) | (data >> 4 & 7)] = LED_MAP[data & 0x0f];
}
@ -551,8 +533,7 @@ void thayers_state::thayers_io_map(address_map &map)
map(0xf3, 0xf3).w(FUNC(thayers_state::periodic_int_ack_w));
map(0xf4, 0xf4).w(FUNC(thayers_state::laserdisc_data_w));
map(0xf5, 0xf5).w(FUNC(thayers_state::laserdisc_control_w));
map(0xf6, 0xf6).w(FUNC(thayers_state::den1_w));
map(0xf7, 0xf7).w(FUNC(thayers_state::den2_w));
map(0xf6, 0xf7).w(FUNC(thayers_state::den_w));
}