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mac.cpp: cleanup some leftover PowerMac bits [R. Belmont]

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This commit is contained in:
arbee 2021-03-27 20:53:33 -04:00
parent aaaf107d18
commit 87bf87dae8
2 changed files with 0 additions and 50 deletions
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44
src/mame/drivers/mac.cpp
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@ -443,50 +443,6 @@ void mac_state::swimiop_w(offs_t offset, uint8_t data)
// printf("swimiop_w %x @ %x (PC=%x)\n", data, offset, m_maincpu->pc());
}
uint8_t mac_state::pmac_diag_r(offs_t offset)
{
switch (offset)
{
case 0: // return 0 here to get the 'car crash' sound after the boot bong, 1 otherwise
return 1;
}
return 0;
}
uint8_t mac_state::amic_dma_r()
{
return 0;
}
void mac_state::amic_dma_w(offs_t offset, uint8_t data)
{
// printf("amic_dma_w: %02x at %x (PC=%x)\n", data, offset+0x1000, m_maincpu->pc());
}
// HMC has one register: a 35-bit shift register which is accessed one bit at a time (see pmac6100 code at 4030383c which makes this obvious)
uint8_t mac_state::hmc_r()
{
uint8_t rv = (uint8_t)(m_hmc_shiftout&1);
m_hmc_shiftout>>= 1;
return rv;
}
void mac_state::hmc_w(offs_t offset, uint8_t data)
{
// writes to xxx8 reset the bit shift position
if ((offset&0x8) == 8)
{
m_hmc_shiftout = m_hmc_reg;
}
else
{
uint64_t temp = (data & 1) ? 0x400000000U : 0x0U;
m_hmc_reg >>= 1;
m_hmc_reg |= temp;
}
}
/***************************************************************************
ADDRESS MAPS
***************************************************************************/

6
src/mame/includes/mac.h
View File

@ -339,12 +339,6 @@ private:
uint8_t scciop_r(offs_t offset);
void scciop_w(offs_t offset, uint8_t data);
uint8_t hmc_r();
void hmc_w(offs_t offset, uint8_t data);
uint8_t amic_dma_r();
void amic_dma_w(offs_t offset, uint8_t data);
uint8_t pmac_diag_r(offs_t offset);
DECLARE_WRITE_LINE_MEMBER(nubus_irq_9_w);
DECLARE_WRITE_LINE_MEMBER(nubus_irq_a_w);
DECLARE_WRITE_LINE_MEMBER(nubus_irq_b_w);