Macintosh-Tools/dingusppc
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Basic emulation of the PDM on-board video.

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This commit is contained in:
Maxim Poliakovski
2021-12-07 22:48:33 +01:00
parent 476d893094
commit 9caaf0f538
6 changed files with 347 additions and 7 deletions
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devices/memctrl/hmc.cpp
+4 -4
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@@ -33,7 +33,7 @@ HMC::HMC() : MemCtrlBase()
/* add memory mapped I/O region for the HMC control register */
add_mmio_region(0x50F40000, 0x10000, this);
this->config_reg = 0ULL;
this->ctrl_reg = 0ULL;
this->bit_pos = 0;
}
@@ -48,7 +48,7 @@ bool HMC::supports_type(HWCompType type) {
uint32_t HMC::read(uint32_t reg_start, uint32_t offset, int size)
{
if (!offset)
return !!(this->config_reg & (1ULL << this->bit_pos++));
return !!(this->ctrl_reg & (1ULL << this->bit_pos++));
else
return 0; /* FIXME: what should be returned for invalid offsets? */
}
@@ -60,8 +60,8 @@ void HMC::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
switch(offset) {
case 0:
bit = 1ULL << this->bit_pos++;
this->config_reg = (value & 1) ? this->config_reg | bit :
this->config_reg & ~bit;
this->ctrl_reg = (value & 1) ? this->ctrl_reg | bit :
this->ctrl_reg & ~bit;
break;
case 8: /* writing to HMCBase + 8 resets internal bit position */
this->bit_pos = 0;