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Mapping the DMA's channels to the bus

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This commit is contained in:
Anonymus Raccoon
2020-05-27 15:04:01 +02:00
parent 56d51425f3
commit 4c965e916f
5 changed files with 80 additions and 7 deletions
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sources/CPU/DMA/DMA.cpp
+54
View File
@@ -3,3 +3,57 @@
//
#include "DMA.hpp"
#include "../../Exceptions/InvalidAddress.hpp"
namespace ComSquare::CPU
{
uint8_t DMA::read(uint8_t addr)
{
switch (addr) {
case 0x0:
return this->controlRegister.raw;
case 0x1:
return this->port;
case 0x2:
return this->aAddress.bytes[0];
case 0x3:
return this->aAddress.bytes[1];
case 0x4:
return this->aAddress.bytes[2];
case 0x5:
return this->count.bytes[0];
case 0x6:
return this->count.bytes[1];
default:
throw InvalidAddress("DMA read", addr);
}
}
void DMA::write(uint8_t addr, uint8_t data)
{
switch (addr) {
case 0x0:
this->controlRegister.raw = data;
break;
case 0x1:
this->port = data;
break;
case 0x2:
this->aAddress.bytes[0] = data;
break;
case 0x3:
this->aAddress.bytes[1] = data;
case 0x4:
this->aAddress.bytes[2] = data;
break;
case 0x5:
this->count.bytes[0] = data;
break;
case 0x6:
this->count.bytes[1] = data;
break;
default:
throw InvalidAddress("DMA read", addr);
}
}
}