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Logs a bit more from the Blitter, gives it access to slots.

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This commit is contained in:
Thomas Harte 2021-08-10 07:17:01 -04:00
parent dda154c7c6
commit e412927415
4 changed files with 39 additions and 32 deletions
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16
Machines/Amiga/Blitter.cpp
View File

@ -28,16 +28,15 @@ void Blitter::set_last_word_mask(uint16_t value) {
LOG("Set last word mask: " << PADHEX(4) << value);
}
void Blitter::set_pointer(int channel, int shift, uint16_t value) {
LOG("Set pointer " << channel << " shift " << shift << " to " << PADHEX(4) << value);
}
void Blitter::set_size(uint16_t value) {
LOG("Set size " << PADHEX(4) << value);
width_ = (width_ & ~0x3f) | (value & 0x3f);
height_ = (height_ & ~0x3ff) | (value >> 6);
LOG("Set size to " << std::dec << width_ << ", " << height_);
}
void Blitter::set_minterms(uint16_t value) {
LOG("Set minterms " << PADHEX(4) << value);
minterms_ = value & 0xff;
}
void Blitter::set_vertical_size(uint16_t value) {
@ -61,9 +60,6 @@ uint16_t Blitter::get_status() {
return 0;
}
int Blitter::get_remaining_accesses() {
return 0;
}
void Blitter::run_for(int) {
bool Blitter::advance() {
return false;
}

17
Machines/Amiga/Blitter.hpp
View File

@ -27,7 +27,11 @@ class Blitter {
void set_control(int index, uint16_t value);
void set_first_word_mask(uint16_t value);
void set_last_word_mask(uint16_t value);
void set_pointer(int channel, int shift, uint16_t value);
template <int id, int shift> void set_pointer(uint16_t value) {
addresses_[id] = (addresses_[id] & (0xffff'0000 >> shift)) | uint32_t(value << shift);
}
void set_size(uint16_t value);
void set_minterms(uint16_t value);
void set_vertical_size(uint16_t value);
@ -37,16 +41,15 @@ class Blitter {
uint16_t get_status();
/// @returns The number of accesses required to complete the current
/// operation, if any, or 0 if no operation is pending.
int get_remaining_accesses();
/// Performs the next n accesses.
void run_for(int accesses);
bool advance();
private:
uint16_t *const ram_;
const size_t ram_size_;
uint32_t addresses_[4];
uint8_t minterms_;
int width_ = 0, height_ = 0;
};
}

36
Machines/Amiga/Chipset.cpp
View File

@ -225,8 +225,8 @@ template <int cycle, bool stop_if_cpu> bool Chipset::perform_cycle() {
if constexpr (cycle & 1) {
// Odd slot priority is:
//
// 1. Copper, if interested.
// 2. Bitplane.
// 1. Bitplanes.
// 2. Copper, if interested.
// 3. Blitter.
// 4. CPU.
if((dma_control_ & CopperFlag) == CopperFlag) {
@ -246,12 +246,16 @@ template <int cycle, bool stop_if_cpu> bool Chipset::perform_cycle() {
// 4. CPU.
if constexpr (cycle >= 4 && cycle <= 6) {
if((dma_control_ & DiskFlag) == DiskFlag) {
disk_.advance();
if(disk_.advance()) {
return false;
}
}
}
}
return true;
// Down here: give first refusal to the Blitter, otherwise
// pass on to the CPU.
return !blitter_.advance();
}
template <bool stop_on_cpu> int Chipset::advance_slots(int first_slot, int last_slot) {
@ -547,14 +551,14 @@ void Chipset::perform(const CPU::MC68000::Microcycle &cycle) {
case Write(0x044): blitter_.set_first_word_mask(cycle.value16()); break;
case Write(0x046): blitter_.set_last_word_mask(cycle.value16()); break;
case Write(0x048): blitter_.set_pointer(2, 16, cycle.value16()); break;
case Write(0x04a): blitter_.set_pointer(2, 0, cycle.value16()); break;
case Write(0x04c): blitter_.set_pointer(1, 16, cycle.value16()); break;
case Write(0x04e): blitter_.set_pointer(1, 0, cycle.value16()); break;
case Write(0x050): blitter_.set_pointer(0, 16, cycle.value16()); break;
case Write(0x052): blitter_.set_pointer(0, 0, cycle.value16()); break;
case Write(0x054): blitter_.set_pointer(3, 16, cycle.value16()); break;
case Write(0x056): blitter_.set_pointer(3, 0, cycle.value16()); break;
case Write(0x048): blitter_.set_pointer<2, 16>(cycle.value16()); break;
case Write(0x04a): blitter_.set_pointer<2, 0>(cycle.value16()); break;
case Write(0x04c): blitter_.set_pointer<1, 16>(cycle.value16()); break;
case Write(0x04e): blitter_.set_pointer<1, 0>(cycle.value16()); break;
case Write(0x050): blitter_.set_pointer<0, 16>(cycle.value16()); break;
case Write(0x052): blitter_.set_pointer<0, 0>(cycle.value16()); break;
case Write(0x054): blitter_.set_pointer<3, 16>(cycle.value16()); break;
case Write(0x056): blitter_.set_pointer<3, 0>(cycle.value16()); break;
case Write(0x058): blitter_.set_size(cycle.value16()); break;
case Write(0x05a): blitter_.set_minterms(cycle.value16()); break;
@ -680,8 +684,8 @@ void Chipset::Sprite::set_image_data(int slot, uint16_t value) {
// MARK: - Disk.
void Chipset::DiskDMA::advance() {
if(!dma_enable_) return;
bool Chipset::DiskDMA::advance() {
if(!dma_enable_) return false;
if(!write_) {
// TODO: run an actual PLL, collect actual disk data.
@ -693,8 +697,12 @@ void Chipset::DiskDMA::advance() {
if(!length_) {
chipset_.posit_interrupt(InterruptFlag::DiskBlock);
}
return true;
}
}
return false;
}
// MARK: - CRT connection.

2
Machines/Amiga/Chipset.hpp
View File

@ -225,7 +225,7 @@ class Chipset {
}
}
void advance();
bool advance();
private:
uint32_t address_;