MAME SVN History

199869 Revisions

r26288 Tuesday 19th November, 2013 at 22:20:26 UTC by Michael Zapf
(MESS) ti99_8: Using the new speech rom dumps with proper bit order; also added a method to spchrom. (nw)

[src/emu/machine]	spchrom.c spchrom.h
[src/mess/drivers]	ti99_8.c
[src/mess/machine/ti99]	speech8.c

trunk/src/emu/machine/spchrom.c
r26287	r26288
27	27	: device_t(mconfig, SPEECHROM, "SPEECHROM", tag, owner, clock, "speechrom", __FILE__),
28	28	m_speechROMaddr(0),
29	29	m_load_pointer(0),
30		m_ROM_bits_count(0)
	30	m_ROM_bits_count(0),
	31	m_reverse(false)
31	32	{
32	33	}
33	34
34	35	/*
35	36	Read 'count' bits serially from speech ROM
	37
	38	Actually, the ROM is expected to have reversed bit order, but there are
	39	many dumps with normal bit order.
	40
	41	compatibility mode: 01234567 01234567 01234567 ...
	42	correct mode: 76543210 76543210 76543210 ...
36	43	*/
37	44	int speechrom_device::read(int count)
38	45	{
39	46	int val;
	47	int spchbyte;
	48	int pos;
40	49
41	50	if (m_load_pointer)
42	51	{ /* first read after load address is ignored */
r26287	r26288
45	54	}
46	55
47	56	if (m_speechROMaddr < m_speechROMlen)
48		if (count < m_ROM_bits_count)
49		{
50		m_ROM_bits_count -= count;
51		val = (m_speechrom_data[m_speechROMaddr] >> m_ROM_bits_count) & (0xFF >> (8 - count));
52		}
53		else
54		{
55		val = ((int) m_speechrom_data[m_speechROMaddr]) << 8;
	57	{
	58	val = 0;
	59	pos = 8 - m_ROM_bits_count;
56	60
57		m_speechROMaddr = (m_speechROMaddr + 1) & ~~TMS522~~0~~_ADDRESS_MASK~~;
	61	spchbyte = (m_reverse? (m_speechrom_data[m_speechROMaddr] >> pos) : (m_speechrom_data[m_speechROMaddr] << pos)) & 0xff;
58	62
59		if (m_speechROMaddr < m_speechROMlen)
60		val \|= m_speechrom_data[m_speechROMaddr];
61
62		m_ROM_bits_count += 8 - count;
63
64		val = (val >> m_ROM_bits_count) & (0xFF >> (8 - count));
	63	while (count > 0)
	64	{
	65	val = val << 1;
	66	if ((spchbyte & (m_reverse? 0x01:0x80))!=0) val \|= 1;
	67	spchbyte = m_reverse? (spchbyte >> 1) : (spchbyte << 1);
	68	count--;
	69	if (pos == 7)
	70	{
	71	pos = 0;
	72	m_speechROMaddr = (m_speechROMaddr + 1) & TMS5220_ADDRESS_MASK;
	73	if (m_speechROMaddr >= m_speechROMlen)
	74	count = 0;
	75	else
	76	spchbyte = m_speechrom_data[m_speechROMaddr];
	77	}
	78	else pos++;
65	79	}
	80	m_ROM_bits_count = 8 - pos;
	81	}
66	82	else
	83	{
67	84	val = 0;
	85	}
68	86
69	87	return val;
70	88	}

trunk/src/emu/machine/spchrom.h
r26287	r26288
18	18	int read(int count);
19	19	void load_address(int data);
20	20	void read_and_branch();
	21	void set_reverse_bit_order(bool reverse) { m_reverse = reverse; }
21	22
22	23	// device-level overrides
23	24	virtual void device_start();
r26287	r26288
28	29	unsigned int m_speechROMaddr; /* 18 bit pointer in ROM */
29	30	int m_load_pointer; /* which 4-bit nibble will be affected by load address */
30	31	int m_ROM_bits_count; /* current bit position in ROM */
	32	bool m_reverse;
31	33	};
32	34
33	35

trunk/src/mess/drivers/ti99_8.c
r26287	r26288
1139	1139	ROM_REGION(0x8000, ROM1_TAG, 0)
1140	1140	ROM_LOAD("u25_rom1.bin", 0x0000, 0x8000, CRC(b574461a) SHA1(42c6aed44802cfabdd26b565d6e5ddfcd689f11e))
1141	1141
1142		// Speech ROMs
1143		ROM_REGION(0x8000, SPEECH_TAG, 0)
1144		ROM_LOAD("cd2325a.vsm", 0x0000, 0x4000, CRC(1f58b571) SHA1(0ef4f178716b575a1c0c970c56af8a8d97561ffe))
1145		ROM_LOAD("cd2326a.vsm", 0x4000, 0x4000, CRC(65d00401) SHA1(a367242c2c96cebf0e2bf21862f3f6734b2b3020))
1146
1147	1142	// System GROMs. 3 chips @ f830
1148	1143	// The schematics do not enumerate the circuits but only talk about
1149	1144	// "circuits on board" (COB) so we name the GROMs as gM_N.bin where M is the

trunk/src/mess/machine/ti99/speech8.c
r26287	r26288
118	118	const speech8_config conf = reinterpret_cast<const speech8_config >(static_config());
119	119	m_ready.resolve(conf->ready, *this);
120	120	m_vsp = subdevice<tms5220_device>(SPEECHSYN_TAG);
	121	speechrom_device* mem = subdevice<speechrom_device>("vsm");
	122	mem->set_reverse_bit_order(true);
121	123	}
122	124
123	125	void ti998_spsyn_device::device_reset()
r26287	r26288
142	144	as the TI speech synthesizer. */
143	145	ROM_START( ti998_speech )
144	146	ROM_REGION(0x8000, "vsm", 0)
145		// Note: the following line is actually wrong; the speech roms in the ti 99/4a and 99/8 are two VSM roms labeled CD2325A and CD2326A, and contain the same data as the following line rom does, but with the byte bit order reversed. This bit ordering issue needs to be fixed elsewhere in the code here before the original/real roms can be used.
146		ROM_LOAD_OPTIONAL("spchrom.bin", 0x0000, 0x8000, CRC(58b155f7) SHA1(382292295c00dff348d7e17c5ce4da12a1d87763)) /* system speech ROM */
147		// correct lines are:
148		// ROM_LOAD_OPTIONAL("cd2325a.vsm", 0x0000, 0x4000, CRC(1f58b571) SHA1(0ef4f178716b575a1c0c970c56af8a8d97561ffe))
149		// ROM_LOAD_OPTIONAL("cd2326a.vsm", 0x4000, 0x4000, CRC(65d00401) SHA1(a367242c2c96cebf0e2bf21862f3f6734b2b3020))
	147	ROM_LOAD("cd2325a.vsm", 0x0000, 0x4000, CRC(1f58b571) SHA1(0ef4f178716b575a1c0c970c56af8a8d97561ffe))
	148	ROM_LOAD("cd2326a.vsm", 0x4000, 0x4000, CRC(65d00401) SHA1(a367242c2c96cebf0e2bf21862f3f6734b2b3020))
150	149	ROM_END
151	150
152	151	machine_config_constructor ti998_spsyn_device::device_mconfig_additions() const

199869 Revisions