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fidel6502: disable broken sc12 cpu divider (nw)

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This commit is contained in:
hap 2017-07-25 00:46:43 +02:00
parent f4c54655f2
commit 9488a7703a
1 changed files with 18 additions and 19 deletions
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37
src/mame/drivers/fidel6502.cpp
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@ -12,6 +12,7 @@
TODO:
- verify cpu speed and rom labels where unknown
- SC12 CPU divider isn't working right, seems too slow and the beeper sound should be clean
- EAG missing bankswitch? where is the 2nd half of the 32KB ROM used, if at all?
- granits gives error beeps at start, need to press clear to play
- finish fphantom emulation
@ -232,7 +233,10 @@ RE information from netlist by Berger
8*(8+1) buttons, 8+8+2 red LEDs
DIN 41524C printer port
36-pin edge connector
CPU is a R65C02P4, running at 4MHz
CPU is a R65C02P4, running at 4MHz*
*By default, the CPU frequency is lowered on A13/A14 access, with a factory-set jumper:
/2 on model SC12(1.5MHz), /4 on model 6086(1MHz)
NE556 dual-timer IC:
- timer#1, one-shot at power-on, to CPU _RESET
@ -789,10 +793,13 @@ MACHINE_RESET_MEMBER(fidel6502_state, sc9c)
void fidel6502_state::sc12_set_cpu_freq(offs_t offset)
{
// when a13/a14 is high, XTAL goes through divider(s)
// (depending on factory-set jumper, either one or two 7474)
float div = (m_inp_matrix[9]->read() & 1) ? 0.25 : 0.5;
m_maincpu->set_clock_scale((offset & 0x6000) ? div : 1.0);
if (m_inp_matrix[9]->read() & 2)
{
// when a13/a14 is high, XTAL goes through divider(s)
// (depending on factory-set jumper, either one or two 7474)
float div = (m_inp_matrix[9]->read() & 1) ? 0.25 : 0.5;
m_maincpu->set_clock_scale((offset & 0x6000) ? div : 1.0);
}
}
WRITE8_MEMBER(fidel6502_state::sc12_trampoline_w)
@ -1396,19 +1403,11 @@ static INPUT_PORTS_START( sc12 )
PORT_INCLUDE( fidel_cb_buttons )
PORT_INCLUDE( sc12_sidepanel )
PORT_START("IN.9") // factory-set
PORT_CONFNAME( 0x01, 0x00, "CPU Divider" )
PORT_CONFSETTING( 0x00, "2" )
PORT_CONFSETTING( 0x01, "4" )
INPUT_PORTS_END
static INPUT_PORTS_START( sc12b )
PORT_INCLUDE( sc12 )
PORT_MODIFY("IN.9")
PORT_CONFNAME( 0x01, 0x01, "CPU Divider" )
PORT_CONFSETTING( 0x00, "2" )
PORT_CONFSETTING( 0x01, "4" )
PORT_START("IN.9") // hardwired
PORT_CONFNAME( 0x03, 0x00, "CPU Divider" )
PORT_CONFSETTING( 0x00, "Disabled" )
PORT_CONFSETTING( 0x02, "2" )
PORT_CONFSETTING( 0x03, "4" )
INPUT_PORTS_END
static INPUT_PORTS_START( playmatic )
@ -2352,7 +2351,7 @@ CONS( 1982, fscc9c, fscc9, 0, sc9c, sc9c, fidel6502_state, 0,
CONS( 1983, fscc9ps, fscc9, 0, playmatic, playmatic, fidel6502_state, 0, "Fidelity Electronics", "Sensory 9 Playmatic 'S'", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK ) // Fidelity West Germany
CONS( 1984, fscc12, 0, 0, sc12, sc12, fidel6502_state, 0, "Fidelity Electronics", "Sensory Chess Challenger 12", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
CONS( 1984, fscc12b, fscc12, 0, sc12b, sc12b, fidel6502_state, 0, "Fidelity Electronics", "Sensory Chess Challenger 12-B", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
CONS( 1984, fscc12b, fscc12, 0, sc12b, sc12, fidel6502_state, 0, "Fidelity Electronics", "Sensory Chess Challenger 12-B", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
CONS( 1987, fexcel, 0, 0, fexcelb, fexcelb, fidel6502_state, 0, "Fidelity Electronics", "The Excellence (model 6080B)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
CONS( 1987, fexcelv, fexcel, 0, fexcelv, fexcelv, fidel6502_state, 0, "Fidelity Electronics", "Voice Excellence", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )