diff options
author | 2009-06-01 16:24:08 +0000 | |
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committer | 2009-06-01 16:24:08 +0000 | |
commit | fef4e83b4d2f58e2ee87c1c305fbcab14d172cac (patch) | |
tree | 5bfef562c8b215b648a9f5046035fe60061ff9e0 /src/emu/machine/rp5h01.c | |
parent | be7e2a6f37f4ebd0ccc271ef4a94b4283d920a0e (diff) |
Converted RP5H01 to be a MAME device.
Diffstat (limited to 'src/emu/machine/rp5h01.c')
-rw-r--r-- | src/emu/machine/rp5h01.c | 256 |
1 files changed, 135 insertions, 121 deletions
diff --git a/src/emu/machine/rp5h01.c b/src/emu/machine/rp5h01.c index 255f9bb0977..3a31548a3f2 100644 --- a/src/emu/machine/rp5h01.c +++ b/src/emu/machine/rp5h01.c @@ -1,10 +1,19 @@ +/*************************************************************************** + + RP5H01 + + + 2009-06 Converted to be a device + +***************************************************************************/ + #include "driver.h" #include "machine/rp5h01.h" -/****************************************************************************/ -/* local copy of the interface pointer */ -static const struct RP5H01_interface *intf; +/*************************************************************************** + PARAMETERS +***************************************************************************/ /* these also work as the address masks */ enum { @@ -12,196 +21,201 @@ enum { COUNTER_MODE_7_BITS = 0x7f }; -typedef struct _RP5H01 { + +/*************************************************************************** + TYPE DEFINITIONS +***************************************************************************/ + +typedef struct _rp5h01_state rp5h01_state; +struct _rp5h01_state +{ int counter; int counter_mode; /* test pin */ int enabled; /* chip enable */ int old_reset; /* reset pin state (level-triggered) */ int old_clock; /* clock pin state (level-triggered) */ UINT8 *data; -} RP5H01; - -static RP5H01 RP5H01_state[MAX_RP5H01]; - -/****************************************************************************/ - -int RP5H01_init( running_machine *machine, const struct RP5H01_interface *interface ) { - int i; - - /* setup our local copy of the interface */ - intf = interface; - - if ( intf->num > MAX_RP5H01 ) { - logerror( "Requested number of RP5H01's is bigger than the supported amount\n" ); - return -1; - } +}; - /* initialize the state */ - for( i = 0; i < intf->num; i++ ) { - RP5H01_state[i].counter = 0; - RP5H01_state[i].counter_mode = COUNTER_MODE_6_BITS; - RP5H01_state[i].data = &( memory_region( machine, intf->region[i] )[ intf->offset[i] ] ); - RP5H01_state[i].enabled = 0; - RP5H01_state[i].old_reset = -1; - RP5H01_state[i].old_clock = -1; - } +/*************************************************************************** + INLINE FUNCTIONS +***************************************************************************/ - return 0; +INLINE rp5h01_state *get_safe_token(const device_config *device) +{ + assert(device != NULL); + assert(device->token != NULL); + assert((device->type == RP5H01)); + return (rp5h01_state *)device->token; } -/****************************************************************************/ +INLINE const rp5h01_interface *get_interface(const device_config *device) +{ + assert(device != NULL); + assert((device->type == RP5H01)); + return (const rp5h01_interface *) device->static_config; +} -void RP5H01_enable_w( int which, int data ) { - RP5H01 *chip; +/*************************************************************************** + IMPLEMENTATION +***************************************************************************/ - if ( which >= intf->num ) { - logerror( "RP5H01_enable: trying to access an unmapped chip\n" ); - return; - } +/*------------------------------------------------- + rp5h01_enable_w +-------------------------------------------------*/ - /* get the chip */ - chip = &RP5H01_state[which]; +WRITE8_DEVICE_HANDLER( rp5h01_enable_w ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); /* process the /CE signal and enable/disable the IC */ - chip->enabled = ( data == 0 ) ? 1 : 0; + rp5h01->enabled = (data == 0) ? 1 : 0; } -void RP5H01_reset_w( int which, int data ) { - RP5H01 *chip; - int newstate = ( data == 0 ) ? 0 : 1; - - if ( which >= intf->num ) { - logerror( "RP5H01_enable: trying to access an unmapped chip\n" ); - return; - } +/*------------------------------------------------- + rp5h01_reset_w +-------------------------------------------------*/ - /* get the chip */ - chip = &RP5H01_state[which]; +WRITE8_DEVICE_HANDLER( rp5h01_reset_w ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); + int newstate = (data == 0) ? 0 : 1; /* if it's not enabled, ignore */ - if ( !chip->enabled ) + if (!rp5h01->enabled) return; /* now look for a 0->1 transition */ - if ( chip->old_reset == 0 && newstate == 1 ) { + if (rp5h01->old_reset == 0 && newstate == 1) + { /* reset the counter */ - chip->counter = 0; + rp5h01->counter = 0; } /* update the pin */ - chip->old_reset = newstate; + rp5h01->old_reset = newstate; } -void RP5H01_clock_w( int which, int data ) { - RP5H01 *chip; - int newstate = ( data == 0 ) ? 0 : 1; - - if ( which >= intf->num ) { - logerror( "RP5H01_enable: trying to access an unmapped chip\n" ); - return; - } +/*------------------------------------------------- + rp5h01_clock_w +-------------------------------------------------*/ - /* get the chip */ - chip = &RP5H01_state[which]; +WRITE8_DEVICE_HANDLER( rp5h01_clock_w ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); + int newstate = (data == 0) ? 0 : 1; /* if it's not enabled, ignore */ - if ( !chip->enabled ) + if (!rp5h01->enabled) return; /* now look for a 1->0 transition */ - if ( chip->old_clock == 1 && newstate == 0 ) { + if (rp5h01->old_clock == 1 && newstate == 0) + { /* increment the counter, and mask it with the mode */ - chip->counter++; + rp5h01->counter++; } /* update the pin */ - chip->old_clock = newstate; + rp5h01->old_clock = newstate; } -void RP5H01_test_w( int which, int data ) { - RP5H01 *chip; +/*------------------------------------------------- + rp5h01_test_w +-------------------------------------------------*/ - if ( which >= intf->num ) { - logerror( "RP5H01_enable: trying to access an unmapped chip\n" ); - return; - } - - /* get the chip */ - chip = &RP5H01_state[which]; +WRITE8_DEVICE_HANDLER( rp5h01_test_w ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); /* if it's not enabled, ignore */ - if ( !chip->enabled ) + if (!rp5h01->enabled) return; /* process the test signal and change the counter mode */ - chip->counter_mode = ( data == 0 ) ? COUNTER_MODE_6_BITS : COUNTER_MODE_7_BITS; + rp5h01->counter_mode = (data == 0) ? COUNTER_MODE_6_BITS : COUNTER_MODE_7_BITS; } -int RP5H01_counter_r( int which ) { - RP5H01 *chip; - - if ( which >= intf->num ) { - logerror( "RP5H01_enable: trying to access an unmapped chip\n" ); - return 0; - } +/*------------------------------------------------- + rp5h01_counter_r +-------------------------------------------------*/ - /* get the chip */ - chip = &RP5H01_state[which]; +READ8_DEVICE_HANDLER( rp5h01_counter_r ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); /* if it's not enabled, ignore */ - if ( !chip->enabled ) + if (!rp5h01->enabled) return 0; /* ? (should be high impedance) */ /* return A5 */ - return ( chip->counter >> 5 ) & 1; + return (rp5h01->counter >> 5) & 1; } -int RP5H01_data_r( int which ) { - RP5H01 *chip; - int byte, bit; +/*------------------------------------------------- + rp5h01_data_r +-------------------------------------------------*/ - if ( which >= intf->num ) { - logerror( "RP5H01_enable: trying to access an unmapped chip\n" ); - return 0; - } - - /* get the chip */ - chip = &RP5H01_state[which]; +READ8_DEVICE_HANDLER( rp5h01_data_r ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); + int byte, bit; /* if it's not enabled, ignore */ - if ( !chip->enabled ) + if (!rp5h01->enabled) return 0; /* ? (should be high impedance) */ /* get the byte offset and bit offset */ - byte = ( chip->counter & chip->counter_mode) >> 3; - bit = 7 - ( chip->counter & 7 ); + byte = (rp5h01->counter & rp5h01->counter_mode) >> 3; + bit = 7 - (rp5h01->counter & 7); /* return the data */ - return ( chip->data[byte] >> bit ) & 1; + return (rp5h01->data[byte] >> bit) & 1; } -/****************************************************************************/ +/*------------------------------------------------- + DEVICE_START( rp5h01 ) +-------------------------------------------------*/ -WRITE8_HANDLER( RP5H01_0_enable_w ) { - RP5H01_enable_w( 0, data ); -} +static DEVICE_START( rp5h01 ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); + const rp5h01_interface *intf = get_interface(device); -WRITE8_HANDLER( RP5H01_0_reset_w ) { - RP5H01_reset_w( 0, data ); -} + rp5h01->data = &(memory_region(device->machine, intf->region)[intf->offset]); -WRITE8_HANDLER( RP5H01_0_clock_w ) { - RP5H01_clock_w( 0, data ); + /* register for state saving */ + state_save_register_global(device->machine, rp5h01->counter); + state_save_register_global(device->machine, rp5h01->counter_mode); + state_save_register_global(device->machine, rp5h01->enabled); + state_save_register_global(device->machine, rp5h01->old_reset); + state_save_register_global(device->machine, rp5h01->old_clock); } -WRITE8_HANDLER( RP5H01_0_test_w ) { - RP5H01_test_w( 0, data ); -} +/*------------------------------------------------- + DEVICE_RESET( rp5h01 ) +-------------------------------------------------*/ -READ8_HANDLER( RP5H01_0_counter_r ) { - return RP5H01_counter_r( 0 ); -} +static DEVICE_RESET( rp5h01 ) +{ + rp5h01_state *rp5h01 = get_safe_token(device); -READ8_HANDLER( RP5H01_0_data_r ) { - return RP5H01_data_r( 0 ); + rp5h01->counter = 0; + rp5h01->counter_mode = COUNTER_MODE_6_BITS; + rp5h01->enabled = 0; + rp5h01->old_reset = -1; + rp5h01->old_clock = -1; } + +/*------------------------------------------------- + device definition +-------------------------------------------------*/ + +static const char *DEVTEMPLATE_SOURCE = __FILE__; + +#define DEVTEMPLATE_ID(p,s) p##rp5h01##s +#define DEVTEMPLATE_FEATURES DT_HAS_START | DT_HAS_RESET +#define DEVTEMPLATE_NAME "RP5H01" +#define DEVTEMPLATE_FAMILY "RP5H01" +#define DEVTEMPLATE_CLASS DEVICE_CLASS_PERIPHERAL +#include "devtempl.h" |