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Fixed proper baudrate using the scc baudrate generator and correct crystal value

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This commit is contained in:
Joakim Larsson Edstrom 2016-03-27 14:09:52 +02:00
parent 993f19c8d2
commit 09f2e37a16
1 changed files with 2 additions and 14 deletions
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16
src/mame/drivers/hk68v10.cpp
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@ -184,10 +184,7 @@
#endif
#define BAUDGEN_CLOCK XTAL_19_6608MHz /* Raltron */
/*
*/
#define SCC_CLOCK (BAUDGEN_CLOCK / 128) /* This gives prompt at the RS232 terminal device (9600) */
//#define SCC_CLOCK (BAUDGEN_CLOCK / 4) /* This is correct giving 4.9152MHz as documentation says */
#define SCC_CLOCK (BAUDGEN_CLOCK / 4) /* Giving 4.9152MHz as documentation says */
class hk68v10_state : public driver_device
{
public:
@ -207,7 +204,6 @@ DECLARE_WRITE16_MEMBER (bootvect_w);
//DECLARE_WRITE16_MEMBER (vme_a16_w);
virtual void machine_start () override;
virtual void machine_reset () override;
DECLARE_WRITE_LINE_MEMBER (write_sccterm_clock);
protected:
@ -325,12 +321,7 @@ WRITE16_MEMBER (hk68v10_state::vme_a16_w){
* D1,DO = 10 for 12 Mhz MPU clock
*
* Original HBUG configuration word: 0x003D = 0000 0000 0011 1101
*
*/
WRITE_LINE_MEMBER (hk68v10_state::write_sccterm_clock){
m_sccterm->txca_w (state);
m_sccterm->rxca_w (state);
}
/*
* Machine configuration
@ -341,7 +332,7 @@ MCFG_CPU_ADD ("maincpu", M68010, XTAL_10MHz)
MCFG_CPU_PROGRAM_MAP (hk68v10_mem)
/* Terminal Port config */
MCFG_SCC8530_ADD("scc", XTAL_4MHz, 0, 0, 0, 0 )
MCFG_SCC8530_ADD("scc", SCC_CLOCK, 0, 0, 0, 0 )
MCFG_Z80SCC_OUT_TXDA_CB(DEVWRITELINE("rs232trm", rs232_port_device, write_txd))
MCFG_Z80SCC_OUT_DTRA_CB(DEVWRITELINE("rs232trm", rs232_port_device, write_dtr))
MCFG_Z80SCC_OUT_RTSA_CB(DEVWRITELINE("rs232trm", rs232_port_device, write_rts))
@ -350,9 +341,6 @@ MCFG_RS232_PORT_ADD ("rs232trm", default_rs232_devices, "terminal")
MCFG_RS232_RXD_HANDLER (DEVWRITELINE ("scc", scc8530_device, rxa_w))
MCFG_RS232_CTS_HANDLER (DEVWRITELINE ("scc", scc8530_device, ctsa_w))
MCFG_DEVICE_ADD ("sccterm_clock", CLOCK, SCC_CLOCK)
MCFG_CLOCK_SIGNAL_HANDLER (WRITELINE (hk68v10_state, write_sccterm_clock))
MACHINE_CONFIG_END
/* ROM definitions */