MAME SVN History

199869 Revisions

r21908 Sunday 17th March, 2013 at 13:40:40 UTC by hap
nevermind previous commit :) the other way around makes more sense, since konami's TFR works like that. Also changed konami's exchange mask globally to 7

[src/emu/cpu/m6809]

konami.c konami.ops

trunk/src/emu/cpu/m6809/konami.ops
r21907	r21908
431	431	{
432	432	// konami's EXG instruction differs enough from 6809 to fork the code
433	433	UINT8 param = read_opcode_arg();
434		exgtfr_register reg1 = read_exgtfr_register(param >> 4);
435		exgtfr_register reg2 = read_exgtfr_register(param >> 0);
436		write_exgtfr_register(param >> 4, reg2);
437		write_exgtfr_register(param >> 0, reg1);
	434	exgtfr_register reg1 = read_exgtfr_register(param >> 0);
	435	exgtfr_register reg2 = read_exgtfr_register(param >> 4);
	436	write_exgtfr_register(param >> 0, reg2);
	437	write_exgtfr_register(param >> 4, reg1);
438	438	}
439	439	eat(hd6309_native_mode() ? 3 : 6);
440	440	return;
r21907	r21908
444	444	// konami's TFR instruction differs enough from 6809 to fork the code
445	445	UINT8 param = read_opcode_arg();
446	446	exgtfr_register reg = read_exgtfr_register(param >> 0);
447		write_exgtfr_register((param >> 4~~) & 0x07~~, reg);
	447	write_exgtfr_register(param >> 4, reg);
448	448	}
449	449	eat(hd6309_native_mode() ? 2 : 4);
450	450	return;

trunk/src/emu/cpu/m6809/konami.c
r21907	r21908
197	197	exgtfr_register result;
198	198	result.word_value = 0x00FF;
199	199
200		switch(reg & 0x0F)
	200	switch(reg & 0x07)
201	201	{
202	202	case 0: result.word_value = m_d.b.h; break; // A
203	203	case 1: result.word_value = m_d.b.l; break; // B
r21907	r21908
217	217
218	218	ATTR_FORCE_INLINE void konami_cpu_device::write_exgtfr_register(UINT8 reg, m6809_base_device::exgtfr_register value)
219	219	{
220		switch(reg & 0x0F)
	220	switch(reg & 0x07)
221	221	{
222	222	case 0: m_d.b.h = value.byte_value; break; // A
223	223	case 1: m_d.b.l = value.byte_value; break; // B

199869 Revisions