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https://github.com/holub/mame
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upd7725.c: Implementation of the p0 and p1 output
bits as device lines; preliminary implementation of INT input line. [Lord Nightmare]
This commit is contained in:
Jonathan Gevaryahu
parent
6e0083a8d7
commit
258be9aad6
@ -114,7 +114,7 @@ UINT32 necdsp_device_config::execute_max_cycles() const
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UINT32 necdsp_device_config::execute_input_lines() const
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{
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return 0;
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return 3; // TODO: there should be 11: INT, SCK, /SIEN, /SOEN, SI, and /DACK, plus SO, /SORQ and DRQ; for now, just INT, P0, and P1 are enough.
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}
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@ -151,7 +151,35 @@ UINT32 necdsp_device_config::disasm_max_opcode_bytes() const
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return 4;
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}
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//-------------------------------------------------
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// device_config_complete - perform any
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// operations now that the configuration is
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// complete
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//-------------------------------------------------
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void necdsp_device_config::device_config_complete()
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{
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// inherit a copy of the static data
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const necdsp_interface *intf = reinterpret_cast<const necdsp_interface *>(static_config());
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if (intf != NULL)
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*static_cast<necdsp_interface *>(this) = *intf;
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// or initialize to defaults if none provided
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else
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{
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memset(&m_in_int_func, 0, sizeof(m_in_int_func));
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//memset(&m_in_si_func, 0, sizeof(m_in_si_func));
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//memset(&m_in_sck_func, 0, sizeof(m_in_sck_func));
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//memset(&m_in_sien_func, 0, sizeof(m_in_sien_func));
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//memset(&m_in_soen_func, 0, sizeof(m_in_soen_func));
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//memset(&m_in_dack_func, 0, sizeof(m_in_dack_func));
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memset(&m_out_p0_func, 0, sizeof(m_out_p0_func));
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memset(&m_out_p1_func, 0, sizeof(m_out_p1_func));
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//memset(&m_out_so_func, 0, sizeof(m_out_so_func));
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//memset(&m_out_sorq_func, 0, sizeof(m_out_sorq_func));
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//memset(&m_out_drq_func, 0, sizeof(m_out_drq_func));
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}
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}
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//**************************************************************************
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// DEVICE INTERFACE
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@ -159,9 +187,11 @@ UINT32 necdsp_device_config::disasm_max_opcode_bytes() const
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necdsp_device::necdsp_device(running_machine &_machine, const necdsp_device_config &config)
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: cpu_device(_machine, config),
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m_irq(0),
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m_program(NULL),
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m_data(NULL),
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m_direct(NULL)
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m_direct(NULL),
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m_config(config)
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{
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}
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@ -207,6 +237,19 @@ void necdsp_device::device_start()
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state_add(UPD7725_SO, "SO", regs.so);
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state_add(UPD7725_IDB, "IDB", regs.idb);
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// resolve callbacks
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devcb_resolve_read_line(&m_in_int_func, &m_config.m_in_int_func, this);
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//devcb_resolve_read8(&m_in_si_func, &m_config.m_in_si_func, this);
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//devcb_resolve_read_line(&m_in_sck_func, &m_config.m_in_sck_func, this);
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//devcb_resolve_read_line(&m_in_sien_func, &m_config.m_in_sien_func, this);
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//devcb_resolve_read_line(&m_in_soen_func, &m_config.m_in_soen_func, this);
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//devcb_resolve_read_line(&m_in_dack_func, &m_config.m_in_dack_func, this);
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devcb_resolve_write_line(&m_out_p0_func, &m_config.m_out_p0_func, this);
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devcb_resolve_write_line(&m_out_p1_func, &m_config.m_out_p1_func, this);
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//devcb_resolve_write8(&m_out_so_func, &m_config.m_out_so_func, this);
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//devcb_resolve_write_line(&m_out_sorq_func, &m_config.m_out_sorq_func, this);
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//devcb_resolve_write_line(&m_out_drq_func, &m_config.m_out_drq_func, this);
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// save state registrations
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save_item(NAME(regs.pc));
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save_item(NAME(regs.rp));
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@ -323,6 +366,21 @@ void necdsp_device::state_string_export(const device_state_entry &entry, astring
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}
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}
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//-------------------------------------------------
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// execute_set_input -
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//-------------------------------------------------
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void necdsp_device::execute_set_input(int inputnum, int state)
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{
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switch (inputnum)
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{
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case NECDSP_INPUT_LINE_INT:
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//TODO: detect rising edge; if rising edge found AND IE = 1, push PC, pc = 0x100; else do nothing
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m_irq = state; // set old state to current state
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break;
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// add more when needed
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}
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}
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//-------------------------------------------------
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// disasm_disassemble - call the disassembly
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@ -571,7 +629,10 @@ void necdsp_device::exec_ld(UINT32 opcode) {
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case 4: regs.dp = id; break;
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case 5: regs.rp = id; break;
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case 6: regs.dr = id; regs.sr.rqm = 1; break;
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case 7: regs.sr = (regs.sr & 0x907c) | (id & ~0x907c); break;
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case 7: regs.sr = (regs.sr & 0x907c) | (id & ~0x907c);
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devcb_call_write_line(&m_out_p0_func, regs.sr&0x1);
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devcb_call_write_line(&m_out_p1_func, (regs.sr&0x2)>>1);
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break;
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case 8: regs.so = id; break; //LSB
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case 9: regs.so = id; break; //MSB
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case 10: regs.k = id; break;
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@ -11,6 +11,17 @@
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#ifndef __UPD7725_H__
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#define __UPD7725_H__
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//**************************************************************************
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// ENUMERATIONS
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//**************************************************************************
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// input lines
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enum
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{
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NECDSP_INPUT_LINE_INT = 0
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// add more here as needed
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};
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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@ -19,9 +30,29 @@ class necdsp_device;
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class upd7725_device;
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class upd96050_device;
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// ======================> necdsp_interface
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struct necdsp_interface
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{
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devcb_read_line m_in_int_func;
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//devcb_read8 m_in_si_func;
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//devcb_read_line m_in_sck_func;
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//devcb_read_line m_in_sien_func;
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//devcb_read_line m_in_soen_func;
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//devcb_read_line m_in_dack_func;
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devcb_write_line m_out_p0_func;
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devcb_write_line m_out_p1_func;
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//devcb_write8 m_out_so_func;
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//devcb_write_line m_out_sorq_func;
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//devcb_write_line m_out_drq_func;
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};
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#define NECDSP_INTERFACE(name) \
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const necdsp_interface (name) =
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// ======================> necdsp_device_config
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class necdsp_device_config : public cpu_device_config
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class necdsp_device_config : public cpu_device_config, public necdsp_interface
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{
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friend class necdsp_device;
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@ -35,6 +66,9 @@ public:
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virtual device_t *alloc_device(running_machine &machine) const;
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protected:
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// device_config overrides
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virtual void device_config_complete();
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// device_config_execute_interface overrides
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virtual UINT32 execute_min_cycles() const;
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virtual UINT32 execute_max_cycles() const;
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@ -98,6 +132,7 @@ protected:
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// device_execute_interface overrides
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virtual void execute_run();
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virtual void execute_set_input(int inputnum, int state);
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// device_state_interface overrides
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virtual void state_import(const device_state_entry &entry);
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@ -179,9 +214,26 @@ private:
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void stack_pull();
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int m_icount;
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int m_irq; // old irq line state, for detecting rising edges.
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address_space *m_program, *m_data;
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direct_read_data *m_direct;
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protected:
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// device callbacks
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devcb_resolved_read_line m_in_int_func;
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//devcb_resolved_read8 m_in_si_func;
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//devcb_resolved_read_line m_in_sck_func;
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//devcb_resolved_read_line m_in_sien_func;
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//devcb_resolved_read_line m_in_soen_func;
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//devcb_resolved_read_line m_in_dack_func;
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devcb_resolved_write_line m_out_p0_func;
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devcb_resolved_write_line m_out_p1_func;
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//devcb_resolved_write8 m_out_so_func;
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//devcb_resolved_write_line m_out_sorq_func;
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//devcb_resolved_write_line m_out_drq_func;
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const necdsp_device_config &m_config;
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};
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class upd7725_device : public necdsp_device
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@ -236,4 +288,4 @@ enum
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UPD7725_IDB
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};
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#endif // UPD7725
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#endif /* __UPD7725_H__ */
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