Esempi in C++ (Cpp) per v25_read_byte

Esempio n. 1

File: v25sfr.cpp Progetto: Dagarman/mame

uint16_t v25_common_device::v25_read_word(unsigned a)
{
	if (BIT(a, 0))
		return (v25_read_byte(a) | (v25_read_byte(a + 1) << 8));

	// not sure about this - manual says FFFFC-FFFFE are "reserved"
	if (a == 0xffffe)
		return (m_program->read_byte(a) | (m_data->read_byte(0x1ff) << 8));
	else if ((a & 0xffe00) == m_IDB && (m_RAMEN || BIT(a, 8)))
		return m_data->read_word(a & 0x1ff);
	else
		return m_program->read_word(a);
}

Esempio n. 2

File: v25sfr.c Progetto: johkelly/MAME_hi

int v25_read_word(v25_state_t *nec_state, unsigned a)
{
    if( a & 1 )
        return (v25_read_byte(nec_state, a) | (v25_read_byte(nec_state, a + 1) << 8));

    unsigned page = a >> 8;
    unsigned offs = a & 0xff;

    if(RAMEN && page == (nec_state->IDB << 4 | 0xE))
        return nec_state->ram.w[offs/2];

    if(page == (nec_state->IDB << 4 | 0xF))
        return (read_sfr(nec_state, offs) | (read_sfr(nec_state, offs+1) << 8));

    if(a == 0xFFFFE)	/* not sure about this */
        return (nec_state->program->read_byte(a) | (read_sfr(nec_state, 0xFF) << 8));

    return nec_state->program->read_word(a);
}