6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-02-20 14:29:11 +00:00
Code Issues Projects Releases Wiki Activity

Remove redundant state.

Browse Source
This commit is contained in:
Thomas Harte 2022-08-04 10:06:14 -04:00
parent 511ec5a736
commit 612413cb1c
2 changed files with 8 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Machines/Amiga/Blitter.cpp
View File

@ -126,10 +126,6 @@ void Blitter::set_control(int index, uint16_t value) {
fill_carry_ = (value & 0x0004);
} else {
minterms_ = value & 0xff;
channel_enables_[3] = value & 0x100;
channel_enables_[2] = value & 0x200;
channel_enables_[1] = value & 0x400;
channel_enables_[0] = value & 0x800;
sequencer_.set_control(value >> 8);
}
shifts_[index] = value >> 12;
@ -221,10 +217,10 @@ uint16_t Blitter::get_status() {
// Table 6-2: Typical Blitter Cycle Sequence
void Blitter::add_modulos() {
pointer_[0] += modulos_[0] * channel_enables_[0] * direction_;
pointer_[1] += modulos_[1] * channel_enables_[1] * direction_;
pointer_[2] += modulos_[2] * channel_enables_[2] * direction_;
pointer_[3] += modulos_[3] * channel_enables_[3] * direction_;
pointer_[0] += modulos_[0] * sequencer_.channel_enabled<0>()* direction_;
pointer_[1] += modulos_[1] * sequencer_.channel_enabled<1>() * direction_;
pointer_[2] += modulos_[2] * sequencer_.channel_enabled<2>() * direction_;
pointer_[3] += modulos_[3] * sequencer_.channel_enabled<3>() * direction_;
}
bool Blitter::advance_dma() {

6
Machines/Amiga/Blitter.hpp
View File

@ -108,6 +108,10 @@ class BlitterSequencer {
return std::make_pair(next, loop_);
}
template <int channel> bool channel_enabled() {
return control_ & (8 >> channel);
}
private:
static constexpr std::array<Channel, 1> pattern0 = { Channel::None };
static constexpr std::array<Channel, 2> pattern1 = { Channel::Write, Channel::None };
@ -199,8 +203,6 @@ class Blitter: public DMADevice<4, 4> {
bool exclusive_fill_ = false;
bool fill_carry_ = false;
bool channel_enables_[4]{};
uint8_t minterms_ = 0;
uint32_t a32_ = 0, b32_ = 0;
uint16_t a_data_ = 0, b_data_ = 0, c_data_ = 0;