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r20454 Thursday 24th January, 2013 at 22:17:58 UTC by Wilbert Pol
(MESS) pentagon.c: Start cutting down on the number of tagmap lookups. (nw)

[src/mess/drivers]

pentagon.c

trunk/src/mess/drivers/pentagon.c

r20453	r20454
13	13	{
14	14	public:
15	15	pentagon_state(const machine_config &mconfig, device_type type, const char *tag)
16		: spectrum_state(mconfig, type, tag) { }
	16	: spectrum_state(mconfig, type, tag)
	17	, m_maincpu(*this, "maincpu")
	18	{ }
17	19
18	20	DECLARE_DIRECT_UPDATE_MEMBER(pentagon_direct);
19	21	DECLARE_WRITE8_MEMBER(pentagon_port_7ffd_w);
20	22	DECLARE_MACHINE_RESET(pentagon);
	23
	24	protected:
	25	required_device<cpu_device> m_maincpu;
	26	UINT8 *m_maincpu_rom;
	27
	28	void pentagon_update_memory();
21	29	};
22	30
23	31	DIRECT_UPDATE_MEMBER(pentagon_state::pentagon_direct)
24	32	{
25	33	device_t *beta = machine().device(BETA_DISK_TAG);
26		UINT16 pc = machine().device("maincpu")->safe_pcbase();
	34	UINT16 pc = m_maincpu->pcbase();
27	35
28	36	if (beta->started() && betadisk_is_active(beta))
29	37	{
r20453	r20454
31	39	{
32	40	m_ROMSelection = ((m_port_7ffd_data>>4) & 0x01) ? 1 : 0;
33	41	betadisk_disable(beta);
34		membank("bank1")->set_base(memregion("maincpu")->base() + 0x010000 + (m_ROMSelection<<14));
	42	membank("bank1")->set_base(m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
35	43	}
36	44	} else if (((pc & 0xff00) == 0x3d00) && (m_ROMSelection==1))
37	45	{
r20453	r20454
48	56	membank("bank1")->set_base(machine().root_device().memregion("beta:beta")->base());
49	57	}
50	58	} else {
51		direct.explicit_configure(0x0000, 0x3fff, 0x3fff, machine().root_device().memregion("maincpu")->base() + 0x010000 + (m_ROMSelection<<14));
52		membank("bank1")->set_base(machine().root_device().memregion("maincpu")->base() + 0x010000 + (m_ROMSelection<<14));
	59	direct.explicit_configure(0x0000, 0x3fff, 0x3fff, m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
	60	membank("bank1")->set_base(m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
53	61	}
54	62	return ~0;
55	63	}
56	64	return address;
57	65	}
58	66
59		static void pentagon_update_memory(running_machine &machine)
	67	void pentagon_state::pentagon_update_memory()
60	68	{
61		spectrum_state *state = machine.driver_data<spectrum_state>();
62		device_t *beta = machine.device(BETA_DISK_TAG);
63		UINT8 *messram = machine.device<ram_device>(RAM_TAG)->pointer();
64		state->m_screen_location = messram + ((state->m_port_7ffd_data & 8) ? (7<<14) : (5<<14));
	69	device_t *beta = machine().device(BETA_DISK_TAG);
	70	UINT8 *messram = machine().device<ram_device>(RAM_TAG)->pointer();
	71	m_screen_location = messram + ((m_port_7ffd_data & 8) ? (7<<14) : (5<<14));
65	72
66		state->membank("bank4")->set_base(messram + ((state->m_port_7ffd_data & 0x07) * 0x4000));
	73	membank("bank4")->set_base(messram + ((m_port_7ffd_data & 0x07) * 0x4000));
67	74
68		if (beta->started() && betadisk_is_active(beta) && !( state->m_port_7ffd_data & 0x10 ) )
	75	if (beta->started() && betadisk_is_active(beta) && !( m_port_7ffd_data & 0x10 ) )
69	76	{
70	77	/* GLUK */
71		if (strcmp(machine.system().name, "pent1024")==0) {
72		state->m_ROMSelection = 2;
	78	if (strcmp(machine().system().name, "pent1024")==0) {
	79	m_ROMSelection = 2;
73	80	} else {
74		state->m_ROMSelection = ((state->m_port_7ffd_data>>4) & 0x01) ;
	81	m_ROMSelection = ((m_port_7ffd_data>>4) & 0x01) ;
75	82	}
76	83	}
77	84	else {
78	85	/* ROM switching */
79		state->m_ROMSelection = ((state->m_port_7ffd_data>>4) & 0x01) ;
	86	m_ROMSelection = ((m_port_7ffd_data>>4) & 0x01) ;
80	87	}
81	88	/* rom 0 is 128K rom, rom 1 is 48 BASIC */
82		state->membank("bank1")->set_base(machine.root_device().memregion("maincpu")->base() + 0x010000 + (state->m_ROMSelection<<14));
	89	membank("bank1")->set_base(m_maincpu_rom + 0x010000 + (m_ROMSelection<<14));
83	90	}
84	91
85	92	WRITE8_MEMBER(pentagon_state::pentagon_port_7ffd_w)
r20453	r20454
92	99	m_port_7ffd_data = data;
93	100
94	101	/* update memory */
95		pentagon_update_memory(machine());
	102	pentagon_update_memory();
96	103	}
97	104
98	105	static ADDRESS_MAP_START (pentagon_io, AS_IO, 8, pentagon_state )
r20453	r20454
112	119	{
113	120	UINT8 *messram = machine().device<ram_device>(RAM_TAG)->pointer();
114	121	device_t *beta = machine().device(BETA_DISK_TAG);
115		address_space &space = machine().device("maincpu")->memory().space(AS_PROGRAM);
	122	address_space &space = m_maincpu->space(AS_PROGRAM);
116	123
	124	m_maincpu_rom = memregion("maincpu")->base();
	125
117	126	space.install_read_bank(0x0000, 0x3fff, "bank1");
118	127	space.unmap_write(0x0000, 0x3fff);
119	128
r20453	r20454
133	142
134	143	m_port_7ffd_data = 0;
135	144	m_port_1ffd_data = -1;
136		pentagon_update_memory(machine());
	145	pentagon_update_memory();
137	146	}
138	147
139	148	/* F4 Character Displayer */

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