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r14877 Sunday 8th April, 2012 at 21:53:47 UTC by R. Belmont
Apple II: RamFactor cards now have 8 MB capacity each [R. Belmont]

[src/mess/machine]

a2memexp.c a2memexp.h

src/mess/machine/a2memexp.c

r14876	r14877
82	82	{
83	83	m_shortname = "a2memexp";
84	84	m_isramfactor = false;
	85	m_bankhior = 0xf0;
	86	m_addrmask = 0xfffff;
85	87	}
86	88
87	89	a2bus_ramfactor_device::a2bus_ramfactor_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
r14876	r14877
89	91	{
90	92	m_shortname = "a2ramfac";
91	93	m_isramfactor = true;
	94	m_bankhior = 0x00;
	95	m_addrmask = 0x7fffff;
92	96	}
93	97
94	98	//-------------------------------------------------
r14876	r14877
123	127
124	128	if (offset == 3)
125	129	{
126		retval = m_ram[m_liveptr&0xfffff];
	130	retval = m_ram[m_liveptr&m_addrmask];
127	131	//        printf("Read RAM[%x] = %02x\n", m_liveptr, retval);
128	132	m_liveptr++;
129	133	m_regs[0] = m_liveptr & 0xff;
130	134	m_regs[1] = (m_liveptr>>8) & 0xff;
131		m_regs[2] = ((m_liveptr>>16) & 0xff) | 0xf0;
	135	m_regs[2] = ((m_liveptr>>16) & 0xff) | m_bankhior;
132	136	}
133	137
134		//    if (offset > 3) printf("Read c0n%x (PC=%x) = %02x\n", offset, cpu_get_pc(&space.device()), retval);
	138	//    printf("Read c0n%x (PC=%x) = %02x\n", offset, cpu_get_pc(&space.device()), retval);
135	139
136	140	return retval;
137	141	}
r14876	r14877
143	147
144	148	void a2bus_memexp_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
145	149	{
146		//    if (offset > 3) printf("Write %02x to c0n%x (PC=%x)\n", data, offset, cpu_get_pc(&space.device()));
	150	//    printf("Write %02x to c0n%x (PC=%x)\n", data, offset, cpu_get_pc(&space.device()));
147	151
148	152	switch (offset)
149	153	{
r14876	r14877
152	156	m_wptr |= data;
153	157	m_regs[0] = m_wptr & 0xff;
154	158	m_regs[1] = (m_wptr>>8) & 0xff;
155		m_regs[2] = ((m_wptr>>16) & 0xff) | 0xf0;
	159	m_regs[2] = ((m_wptr>>16) & 0xff) | m_bankhior;
156	160	m_liveptr = m_wptr;
157	161	break;
158	162
r14876	r14877
161	165	m_wptr |= (data<<8);
162	166	m_regs[0] = m_wptr & 0xff;
163	167	m_regs[1] = (m_wptr>>8) & 0xff;
164		m_regs[2] = ((m_wptr>>16) & 0xff) | 0xf0;
	168	m_regs[2] = ((m_wptr>>16) & 0xff) | m_bankhior;
165	169	m_liveptr = m_wptr;
166	170	break;
167	171
r14876	r14877
170	174	m_wptr |= (data<<16);
171	175	m_regs[0] = m_wptr & 0xff;
172	176	m_regs[1] = (m_wptr>>8) & 0xff;
173		m_regs[2] = ((m_wptr>>16) & 0xff) | 0xf0;
	177	m_regs[2] = ((m_wptr>>16) & 0xff) | m_bankhior;
174	178	m_liveptr = m_wptr;
175	179	break;
176	180
177	181	case 3:
178	182	//            printf("Write %02x to RAM[%x]\n", data, m_liveptr);
179		m_ram[(m_liveptr&0xfffff)] = data;
	183	m_ram[(m_liveptr&m_addrmask)] = data;
180	184	m_liveptr++;
181	185	m_regs[0] = m_liveptr & 0xff;
182	186	m_regs[1] = (m_liveptr>>8) & 0xff;
183		m_regs[2] = ((m_liveptr>>16) & 0xff) | 0xf0;
	187	m_regs[2] = ((m_liveptr>>16) & 0xff) | m_bankhior;
184	188	break;
185	189
186	190	default:

src/mess/machine/a2memexp.h

r14876	r14877
29	29	virtual const rom_entry *device_rom_region() const;
30	30
31	31	bool m_isramfactor;
	32	UINT8 m_bankhior;
	33	int m_addrmask;
32	34
33	35	protected:
34	36	virtual void device_start();
r14876	r14877
43	45	private:
44	46	UINT8 *m_rom;
45	47	UINT8 m_regs[0x10];
46		UINT8 m_ram[1*1024*1024];   // 1 MB
	48	UINT8 m_ram[8*1024*1024];
47	49	int m_wptr, m_liveptr;
48	50	};
49	51

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