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Add a functionless PIC.

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This commit is contained in:
Thomas Harte 2023-11-20 13:53:44 -05:00
parent a689f2b63e
commit abf0eead7a
1 changed files with 9 additions and 4 deletions
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13
Machines/PCCompatible/PCCompatible.cpp
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@ -24,6 +24,9 @@
namespace PCCompatible { namespace PCCompatible {
class PIC {
};
class i8255PortHandler : public Intel::i8255::PortHandler { class i8255PortHandler : public Intel::i8255::PortHandler {
// Likely to be helpful: https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol // Likely to be helpful: https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol
public: public:
@ -566,7 +569,7 @@ struct Memory {
class IO { class IO {
public: public:
IO(PIT<false> &pit, DMA &dma, PPI &ppi) : pit_(pit), dma_(dma), ppi_(ppi) {} IO(PIT<false> &pit, DMA &dma, PPI &ppi, PIC &pic) : pit_(pit), dma_(dma), ppi_(ppi), pic_(pic) {}
template <typename IntT> void out(uint16_t port, IntT value) { template <typename IntT> void out(uint16_t port, IntT value) {
switch(port) { switch(port) {
@ -673,6 +676,7 @@ class IO {
PIT<false> &pit_; PIT<false> &pit_;
DMA &dma_; DMA &dma_;
PPI &ppi_; PPI &ppi_;
PIC &pic_;
}; };
class FlowController { class FlowController {
@ -724,7 +728,7 @@ class ConcreteMachine:
ConcreteMachine( ConcreteMachine(
[[maybe_unused]] const Analyser::Static::Target &target, [[maybe_unused]] const Analyser::Static::Target &target,
const ROMMachine::ROMFetcher &rom_fetcher const ROMMachine::ROMFetcher &rom_fetcher
) : ppi_(ppi_handler_), context(pit_, dma_, ppi_) { ) : ppi_(ppi_handler_), context(pit_, dma_, ppi_, pic_) {
// Use clock rate as a MIPS count; keeping it as a multiple or divisor of the PIT frequency is easy. // Use clock rate as a MIPS count; keeping it as a multiple or divisor of the PIT frequency is easy.
static constexpr int pit_frequency = 1'193'182; static constexpr int pit_frequency = 1'193'182;
set_clock_rate(double(pit_frequency) * double(PitMultiplier) / double(PitDivisor)); // i.e. almost 0.4 MIPS for an XT. set_clock_rate(double(pit_frequency) * double(PitMultiplier) / double(PitDivisor)); // i.e. almost 0.4 MIPS for an XT.
@ -786,13 +790,14 @@ class ConcreteMachine:
DMA dma_; DMA dma_;
i8255PortHandler ppi_handler_; i8255PortHandler ppi_handler_;
PPI ppi_; PPI ppi_;
PIC pic_;
struct Context { struct Context {
Context(PIT<false> &pit, DMA &dma, PPI &ppi) : Context(PIT<false> &pit, DMA &dma, PPI &ppi, PIC &pic) :
segments(registers), segments(registers),
memory(registers, segments), memory(registers, segments),
flow_controller(registers, segments), flow_controller(registers, segments),
io(pit, dma, ppi) io(pit, dma, ppi, pic)
{ {
reset(); reset();
} }