mirror of
https://github.com/holub/mame
synced 2025-04-23 17:00:53 +03:00
ins8154: Updated to use devcb calls, cleaned up
This commit is contained in:
Dirk Best
parent
b7927daaff
commit
4c15a5dfd7
@ -1,22 +1,23 @@
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/*****************************************************************************
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*
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* machine/ins8154.h
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*
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* INS8154 N-Channel 128-by-8 Bit RAM Input/Output (RAM I/O)
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*
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* Written by Dirk Best, January 2008
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*
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* TODO: Strobed modes
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*
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****************************************************************************/
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/***************************************************************************
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National Semiconductor INS8154
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N-Channel 128-by-8 Bit RAM Input/Output (RAM I/O)
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TODO: Strobed modes
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***************************************************************************/
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#include "emu.h"
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#include "ins8154.h"
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#define VERBOSE 1
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#define LOG(x) do { if (VERBOSE) logerror x; } while (0)
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/***************************************************************************
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CONSTANTS
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***************************************************************************/
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#define VERBOSE 1
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/* Mode Definition Register */
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enum
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@ -27,11 +28,22 @@ enum
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MDR_STROBED_OUTPUT_3STATE = 0xe0
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};
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typedef struct _ins8154_t ins8154_t;
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struct _ins8154_t
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{
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const ins8154_interface *intf; /* Pointer to our interface */
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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typedef struct _ins8154_state ins8154_state;
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struct _ins8154_state
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{
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/* i/o lines */
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devcb_resolved_read8 in_a_func;
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devcb_resolved_write8 out_a_func;
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devcb_resolved_read8 in_b_func;
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devcb_resolved_write8 out_b_func;
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devcb_resolved_write_line out_irq_func;
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/* registers */
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UINT8 in_a; /* Input Latch Port A */
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UINT8 in_b; /* Input Latch Port B */
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UINT8 out_a; /* Output Latch Port A */
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@ -42,79 +54,62 @@ struct _ins8154_t
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};
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static DEVICE_START( ins8154 )
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/*****************************************************************************
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INLINE FUNCTIONS
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*****************************************************************************/
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INLINE ins8154_state *get_safe_token(running_device *device)
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{
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ins8154_t *ins8154 = (ins8154_t *)device->token;
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assert(device != NULL);
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assert(device->token != NULL);
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assert(device->type == INS8154);
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/* validate arguments */
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assert(device->tag != NULL);
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/* assign interface */
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ins8154->intf = (const ins8154_interface*)device->baseconfig().static_config;
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/* register for state saving */
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->in_a);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->in_b);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->out_a);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->out_b);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->mdr);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->odra);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->odrb);
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return (ins8154_state *)device->token;
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}
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static DEVICE_RESET( ins8154 )
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{
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ins8154_t *ins8154 = (ins8154_t *)device->token;
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ins8154->in_a = 0;
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ins8154->in_b = 0;
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ins8154->out_a = 0;
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ins8154->out_b = 0;
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ins8154->mdr = 0;
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ins8154->odra = 0;
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ins8154->odrb = 0;
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}
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/***************************************************************************
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IMPLEMENTATION
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***************************************************************************/
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READ8_DEVICE_HANDLER( ins8154_r )
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{
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ins8154_t *i = (ins8154_t *)device->token;
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ins8154_state *ins8154 = get_safe_token(device);
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UINT8 val = 0xff;
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if (offset > 0x24)
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{
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logerror("INS8154 (%08x): Read from unknown offset %02x!\n",
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cpu_get_pc( device->machine->firstcpu ), offset);
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if (VERBOSE)
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logerror("%s: INS8154 '%s' Read from invalid offset %02x!\n", cpuexec_describe_context(device->machine), device->tag.cstr(), offset);
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return 0xff;
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}
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switch (offset)
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{
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case 0x20:
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if (i->intf->in_a_func)
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val = i->intf->in_a_func(device, 0);
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i->in_a = val;
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if (ins8154->in_a_func.read != NULL)
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val = devcb_call_read8(&ins8154->in_a_func, 0);
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ins8154->in_a = val;
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break;
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case 0x21:
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if (i->intf->in_b_func)
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val = i->intf->in_b_func(device, 0);
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i->in_b = val;
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if (ins8154->in_b_func.read != NULL)
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val = devcb_call_read8(&ins8154->in_b_func, 0);
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ins8154->in_b = val;
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break;
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default:
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if (offset < 0x08)
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{
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if (i->intf->in_a_func)
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val = (i->intf->in_a_func(device, 0) << (8 - offset)) & 0x80;
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i->in_a = val;
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if (ins8154->in_a_func.read != NULL)
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val = (devcb_call_read8(&ins8154->in_a_func, 0) << (8 - offset)) & 0x80;
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ins8154->in_a = val;
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}
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else
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{
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if (i->intf->in_a_func)
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val = (i->intf->in_a_func(device, 0) << (8 - (offset >> 4))) & 0x80;
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i->in_b = val;
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if (ins8154->in_b_func.read != NULL)
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val = (devcb_call_read8(&ins8154->in_b_func, 0) << (8 - (offset >> 4))) & 0x80;
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ins8154->in_b = val;
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}
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break;
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}
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@ -124,48 +119,34 @@ READ8_DEVICE_HANDLER( ins8154_r )
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WRITE8_DEVICE_HANDLER( ins8154_porta_w )
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{
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ins8154_t *i = (ins8154_t *)device->token;
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ins8154_state *ins8154 = get_safe_token(device);
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i->out_a = data;
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ins8154->out_a = data;
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/* Test if any pins are set as outputs */
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if (i->odra)
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{
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if (i->intf->out_a_func)
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i->intf->out_a_func(device, 0, (data & i->odra) | (i->odra ^ 0xff));
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else
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logerror("INS8154 (%08x): Write to port A but no write handler defined!\n",
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cpu_get_pc( device->machine->firstcpu ) );
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}
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if (ins8154->odra)
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devcb_call_write8(&ins8154->out_a_func, 0, (data & ins8154->odra) | (ins8154->odra ^ 0xff));
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}
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WRITE8_DEVICE_HANDLER( ins8154_portb_w )
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{
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ins8154_t *i = (ins8154_t *)device->token;
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ins8154_state *ins8154 = get_safe_token(device);
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i->out_b = data;
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ins8154->out_b = data;
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/* Test if any pins are set as outputs */
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if (i->odrb)
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{
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if (i->intf->out_b_func)
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i->intf->out_b_func(device, 0, (data & i->odrb) | (i->odrb ^ 0xff));
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else
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logerror("INS8154 (%08x): Write to port B but no write handler defined!\n",
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cpu_get_pc( device->machine->firstcpu ) );
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}
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if (ins8154->odrb)
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devcb_call_write8(&ins8154->out_b_func, 0, (data & ins8154->odrb) | (ins8154->odrb ^ 0xff));
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}
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WRITE8_DEVICE_HANDLER( ins8154_w )
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{
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ins8154_t *i = (ins8154_t *)device->token;
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ins8154_state *ins8154 = get_safe_token(device);
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if (offset > 0x24)
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{
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logerror("INS8154 (%04x): Write %02x to invalid offset %02x!\n",
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cpu_get_pc( device->machine->firstcpu ), data, offset);
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if (VERBOSE)
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logerror("%s: INS8154 '%s' Write %02x to invalid offset %02x!\n", cpuexec_describe_context(device->machine), device->tag.cstr(), data, offset);
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return;
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}
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@ -180,21 +161,24 @@ WRITE8_DEVICE_HANDLER( ins8154_w )
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break;
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case 0x22:
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LOG(("INS8154 (%04x): ODR for port A set to %02x\n",
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cpu_get_pc( device->machine->firstcpu ), data));
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i->odra = data;
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if (VERBOSE)
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logerror("%s: INS8154 '%s' ODRA set to %02x\n", cpuexec_describe_context(device->machine), device->tag.cstr(), data);
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ins8154->odra = data;
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break;
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case 0x23:
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LOG(("INS8154 (%04x): ODR for port B set to %02x\n",
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cpu_get_pc( device->machine->firstcpu ), data));
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i->odrb = data;
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if (VERBOSE)
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logerror("%s: INS8154 '%s' ODRB set to %02x\n", cpuexec_describe_context(device->machine), device->tag.cstr(), data);
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ins8154->odrb = data;
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break;
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case 0x24:
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LOG(("INS8154 (%04x): MDR set to %02x\n",
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cpu_get_pc( device->machine->firstcpu ), data));
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i->mdr = data;
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if (VERBOSE)
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logerror("%s: INS8154 '%s' MDR set to %02x\n", cpuexec_describe_context(device->machine), device->tag.cstr(), data);
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ins8154->mdr = data;
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break;
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default:
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@ -203,11 +187,11 @@ WRITE8_DEVICE_HANDLER( ins8154_w )
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/* Set bit */
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if (offset < 0x08)
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{
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ins8154_porta_w(device, 0, i->out_a |= offset & 0x07);
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ins8154_porta_w(device, 0, ins8154->out_a |= offset & 0x07);
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}
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else
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{
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ins8154_portb_w(device, 0, i->out_b |= (offset >> 4) & 0x07);
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ins8154_portb_w(device, 0, ins8154->out_b |= (offset >> 4) & 0x07);
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}
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}
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else
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@ -215,11 +199,11 @@ WRITE8_DEVICE_HANDLER( ins8154_w )
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/* Clear bit */
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if (offset < 0x08)
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{
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ins8154_porta_w(device, 0, i->out_a & ~(offset & 0x07));
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ins8154_porta_w(device, 0, ins8154->out_a & ~(offset & 0x07));
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}
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else
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{
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ins8154_portb_w(device, 0, i->out_b & ~((offset >> 4) & 0x07));
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ins8154_portb_w(device, 0, ins8154->out_b & ~((offset >> 4) & 0x07));
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}
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}
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@ -228,25 +212,59 @@ WRITE8_DEVICE_HANDLER( ins8154_w )
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}
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DEVICE_GET_INFO( ins8154 )
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/*****************************************************************************
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DEVICE INTERFACE
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*****************************************************************************/
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static DEVICE_START( ins8154 )
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{
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switch (state)
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{
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/* --- the following bits of info are returned as 64-bit signed integers --- */
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case DEVINFO_INT_INLINE_CONFIG_BYTES: info->i = 0; break;
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case DEVINFO_INT_CLASS: info->i = DEVICE_CLASS_PERIPHERAL; break;
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case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(ins8154_t); break;
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ins8154_state *ins8154 = get_safe_token(device);
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const ins8154_interface *intf = (const ins8154_interface *)device->baseconfig().static_config;
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/* --- the following bits of info are returned as pointers to data or functions --- */
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case DEVINFO_FCT_START: info->start = DEVICE_START_NAME(ins8154); break;
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case DEVINFO_FCT_STOP: /* Nothing */ break;
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case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME(ins8154); break;
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/* validate some basic stuff */
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assert(intf != NULL);
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/* --- the following bits of info are returned as NULL-terminated strings --- */
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case DEVINFO_STR_NAME: strcpy(info->s, "National Semiconductor INS8154"); break;
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case DEVINFO_STR_FAMILY: strcpy(info->s, "INS8154"); break;
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case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break;
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case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
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case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright MESS Team"); break;
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}
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/* resolve callbacks */
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devcb_resolve_read8(&ins8154->in_a_func, &intf->in_a_func, device);
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devcb_resolve_write8(&ins8154->out_a_func, &intf->out_a_func, device);
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devcb_resolve_read8(&ins8154->in_b_func, &intf->in_b_func, device);
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devcb_resolve_write8(&ins8154->out_b_func, &intf->out_b_func, device);
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devcb_resolve_write_line(&ins8154->out_irq_func, &intf->out_irq_func, device);
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/* register for state saving */
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->in_a);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->in_b);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->out_a);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->out_b);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->mdr);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->odra);
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state_save_register_item(device->machine, "ins8154", device->tag, 0, ins8154->odrb);
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}
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static DEVICE_RESET( ins8154 )
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{
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ins8154_state *ins8154 = get_safe_token(device);
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ins8154->in_a = 0;
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ins8154->in_b = 0;
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ins8154->out_a = 0;
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ins8154->out_b = 0;
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ins8154->mdr = 0;
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ins8154->odra = 0;
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ins8154->odrb = 0;
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}
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/***************************************************************************
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DEVICE GETINFO
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***************************************************************************/
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static const char DEVTEMPLATE_SOURCE[] = __FILE__;
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#define DEVTEMPLATE_ID(p,s) p##ins8154##s
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#define DEVTEMPLATE_FEATURES DT_HAS_START | DT_HAS_RESET
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#define DEVTEMPLATE_NAME "INS8154"
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#define DEVTEMPLATE_FAMILY "INS8154"
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#define DEVTEMPLATE_VERSION "1.1"
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#define DEVTEMPLATE_CREDITS "Copyright MESS Team"
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#include "devtempl.h"
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@ -1,60 +1,76 @@
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/*****************************************************************************
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*
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* machine/ins8154.h
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*
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* INS8154 N-Channel 128-by-8 Bit RAM Input/Output (RAM I/O)
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*
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****************************************************************************/
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#ifndef INS8154_H_
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#define INS8154_H_
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/***************************************************************************
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MACROS
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National Semiconductor INS8154
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N-Channel 128-by-8 Bit RAM Input/Output (RAM I/O)
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_____ _____
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PB6 1 |* \_/ | 40 VCC
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PB5 2 | | 39 PB7
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PB4 3 | | 38 NWDS
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PB3 4 | | 37 NRDS
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PB2 5 | | 36 NRST
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PB1 6 | | 35 _CS0
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PB0 7 | | 34 CS1
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DB7 8 | | 33 M/_IO
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DB6 9 | | 32 AD6
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DB5 10 | INS8154 | 31 AD5
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DB4 11 | | 30 AD4
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DB3 12 | | 29 AD3
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DB2 13 | | 28 AD2
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DB1 14 | | 27 AD1
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DB0 15 | | 26 AD0
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PA7 16 | | 25 INTR
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PA6 17 | | 24 PA0
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PA5 18 | | 23 PA1
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PA4 19 | | 22 PA2
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GND 20 |_____________| 21 PA3
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***************************************************************************/
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#define INS8154 DEVICE_GET_INFO_NAME(ins8154)
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#ifndef __INS8154_H__
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#define __INS8154_H__
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#include "devcb.h"
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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typedef void (*ins8154_irq_func)(running_device *device, int state);
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#define INS8154_IRQ(name) void name(running_device *device, int state )
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/******************* Interface **********************************************/
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typedef struct _ins8154_interface ins8154_interface;
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struct _ins8154_interface
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{
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read8_device_func in_a_func;
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read8_device_func in_b_func;
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write8_device_func out_a_func;
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write8_device_func out_b_func;
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ins8154_irq_func irq_func;
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devcb_read8 in_a_func;
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devcb_write8 out_a_func;
|
||||
devcb_read8 in_b_func;
|
||||
devcb_write8 out_b_func;
|
||||
devcb_write_line out_irq_func;
|
||||
};
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
FUNCTION PROTOTYPES
|
||||
***************************************************************************/
|
||||
|
||||
DEVICE_GET_INFO( ins8154 );
|
||||
|
||||
|
||||
/******************* Standard 8-bit CPU interfaces, D0-D7 *******************/
|
||||
|
||||
READ8_DEVICE_HANDLER( ins8154_r );
|
||||
WRITE8_DEVICE_HANDLER( ins8154_w );
|
||||
|
||||
|
||||
/******************* 8-bit A/B port interfaces ******************************/
|
||||
|
||||
WRITE8_DEVICE_HANDLER( ins8154_porta_w );
|
||||
WRITE8_DEVICE_HANDLER( ins8154_portb_w );
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
DEVICE CONFIGURATION MACROS
|
||||
***************************************************************************/
|
||||
|
||||
#define INS8154 DEVICE_GET_INFO_NAME(ins8154)
|
||||
|
||||
#define MDRV_INS8154_ADD(_tag, _intrf) \
|
||||
MDRV_DEVICE_ADD(_tag, INS8154, 0) \
|
||||
MDRV_DEVICE_CONFIG(_intrf)
|
||||
|
||||
#endif /* INS8154_H_ */
|
||||
|
||||
#endif /* __INS8154_H__ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user