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improve ebball3 clock

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This commit is contained in:
hap 2015-03-12 13:00:26 +01:00
parent 60af9983cd
commit c307ec2a16
3 changed files with 11 additions and 7 deletions
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10
src/mess/drivers/hh_tms1k.c
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@ -1058,10 +1058,10 @@ INPUT_PORTS_END
void hh_tms1k_state::ebball3_set_clock()
{
// MCU clock is from an RC circuit oscillating by default at ~375kHz,
// but on PRO, the difficulty switch adds an extra capacitor to Vdd to speed
// it up to unknown, let's assume ~425kHz.
m_maincpu->set_unscaled_clock(m_inp_matrix[3]->read() & 1 ? 425000 : 375000);
// MCU clock is from an RC circuit(R=47K, C=33pf) oscillating by default at ~340kHz,
// but on PRO, the difficulty switch adds an extra 150K resistor to Vdd to speed
// it up to around ~440kHz.
m_maincpu->set_unscaled_clock(m_inp_matrix[3]->read() & 1 ? 440000 : 340000);
}
INPUT_CHANGED_MEMBER(hh_tms1k_state::ebball3_difficulty_switch)
@ -1078,7 +1078,7 @@ MACHINE_RESET_MEMBER(hh_tms1k_state, ebball3)
static MACHINE_CONFIG_START( ebball3, hh_tms1k_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", TMS1100, 375000) // RC osc. R=47K, C=33pf -> ~375kHz
MCFG_CPU_ADD("maincpu", TMS1100, 340000) // see ebball3_set_clock
MCFG_TMS1XXX_READ_K_CB(READ8(hh_tms1k_state, ebball3_read_k))
MCFG_TMS1XXX_WRITE_R_CB(WRITE16(hh_tms1k_state, ebball3_write_r))
MCFG_TMS1XXX_WRITE_O_CB(WRITE16(hh_tms1k_state, ebball3_write_o))

4
src/mess/layout/hh_hmcs40_test.lay
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@ -5,9 +5,11 @@
<element name="static_black"><rect><color red="0.0" green="0.0" blue="0.0" /></rect></element>
<element name="led" defstate="0">
<element name="led" defstate="2">
<disk state="0"><color red="0.1" green="0.2" blue="0.2" /></disk>
<disk state="1"><color red="0.5" green="1.0" blue="1.0" /></disk>
<disk state="2"><color red="0" green="0" blue="0" /></disk>
</element>

4
src/mess/layout/hh_ucom4_test.lay
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@ -5,9 +5,11 @@
<element name="static_black"><rect><color red="0.0" green="0.0" blue="0.0" /></rect></element>
<element name="led" defstate="0">
<element name="led" defstate="2">
<disk state="0"><color red="0.1" green="0.2" blue="0.2" /></disk>
<disk state="1"><color red="0.5" green="1.0" blue="1.0" /></disk>
<disk state="2"><color red="0" green="0" blue="0" /></disk>
</element>