6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-02-25 17:29:40 +00:00
Code Issues Projects Releases Wiki Activity

Edges mildly closer to line output.

Browse Source
This commit is contained in:
Thomas Harte 2021-09-26 19:18:12 -04:00
parent b4b6c4d86f
commit f6624bf776
2 changed files with 23 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Machines/Amiga/Blitter.cpp
View File

@ -19,7 +19,11 @@ using namespace Amiga;
void Blitter::set_control(int index, uint16_t value) {
if(index) {
line_mode_ = (value & 0x0001);
direction_ = (value & 0x0002) ? uint32_t(-1) : uint32_t(1);
one_dot_ = value & 0x0002;
line_direction_ = (value >> 2) & 7;
line_sign_ = (value & 0x0040) ? -1 : 1;
direction_ = one_dot_ ? uint32_t(-1) : uint32_t(1);
} else {
minterms_ = value & 0xff;
channel_enables_[3] = value & 0x100;
@ -131,12 +135,19 @@ bool Blitter::advance() {
//
// So that's:
//
// * bit 4 = x or y major;
// * bit 4 = x [=1] or y [=0] major;
// * bit 3 = 1 => major variable negative; otherwise positive;
// * bit 2 = 1 => minor variable negative; otherwise positive.
printf("!!! Line %08x\n", pointer_[3]);
// ram_[pointer_[3] & ram_mask_] = 0x0001 << shifts_[0];
int error = int(pointer_[0]) * line_sign_;
while(height_--) {
ram_[pointer_[3] & ram_mask_] = 0x8000 >> shifts_[0];
// Assumed for now: quadrant 0.
}
// ram_[pointer_[3] & ram_mask_] = 0xffff;
} else {
// Copy mode.

12
Machines/Amiga/Blitter.hpp
View File

@ -43,11 +43,17 @@ class Blitter: public DMADevice<4> {
private:
int width_ = 0, height_ = 0;
int shifts_[2]{};
bool line_mode_ = false;
bool channel_enables_[4]{};
uint32_t direction_ = 1;
uint16_t a_mask_[2] = {0xffff, 0xffff};
bool line_mode_ = false;
bool one_dot_ = false;
int line_direction_ = 0;
int line_sign_ = 1;
uint32_t direction_ = 1;
bool channel_enables_[4]{};
uint8_t minterms_ = 0;
uint32_t a32_ = 0, b32_ = 0;
uint16_t a_ = 0, b_ = 0, c_ = 0;