mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-27 01:31:42 +00:00
Merge pull request #529 from TomHarte/AppleDelay
Corrects Apple II video defects
This commit is contained in:
Thomas Harte
GitHub
commit
adb574e1cd
81
ClockReceiver/ClockDeferrer.hpp
Normal file
81
ClockReceiver/ClockDeferrer.hpp
Normal file
@ -0,0 +1,81 @@
|
||||
//
|
||||
// ClockDeferrer.hpp
|
||||
// Clock Signal
|
||||
//
|
||||
// Created by Thomas Harte on 23/08/2018.
|
||||
// Copyright © 2018 Thomas Harte. All rights reserved.
|
||||
//
|
||||
|
||||
#ifndef ClockDeferrer_h
|
||||
#define ClockDeferrer_h
|
||||
|
||||
#include <vector>
|
||||
|
||||
/*!
|
||||
A ClockDeferrer maintains a list of ordered actions and the times at which
|
||||
they should happen, and divides a total execution period up into the portions
|
||||
that occur between those actions, triggering each action when it is reached.
|
||||
*/
|
||||
template <typename TimeUnit> class ClockDeferrer {
|
||||
public:
|
||||
/// Constructs a ClockDeferrer that will call target(period) in between deferred actions.
|
||||
ClockDeferrer(std::function<void(TimeUnit)> &&target) : target_(std::move(target)) {}
|
||||
|
||||
/*!
|
||||
Schedules @c action to occur in @c delay units of time.
|
||||
|
||||
Actions must be scheduled in the order they will occur. It is undefined behaviour
|
||||
to schedule them out of order.
|
||||
*/
|
||||
void defer(TimeUnit delay, const std::function<void(void)> &action) {
|
||||
pending_actions_.emplace_back(delay, action);
|
||||
}
|
||||
|
||||
/*!
|
||||
Runs for @c length units of time.
|
||||
|
||||
The constructor-supplied target will be called with one or more periods that add up to @c length;
|
||||
any scheduled actions will be called between periods.
|
||||
*/
|
||||
void run_for(TimeUnit length) {
|
||||
// If there are no pending actions, just run for the entire length.
|
||||
// This should be the normal branch.
|
||||
if(pending_actions_.empty()) {
|
||||
target_(length);
|
||||
return;
|
||||
}
|
||||
|
||||
// Divide the time to run according to the pending actions.
|
||||
while(length > TimeUnit(0)) {
|
||||
TimeUnit next_period = pending_actions_.empty() ? length : std::min(length, pending_actions_[0].delay);
|
||||
target_(next_period);
|
||||
length -= next_period;
|
||||
|
||||
off_t performances = 0;
|
||||
for(auto &action: pending_actions_) {
|
||||
action.delay -= next_period;
|
||||
if(!action.delay) {
|
||||
action.action();
|
||||
++performances;
|
||||
}
|
||||
}
|
||||
if(performances) {
|
||||
pending_actions_.erase(pending_actions_.begin(), pending_actions_.begin() + performances);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
std::function<void(TimeUnit)> target_;
|
||||
|
||||
// The list of deferred actions.
|
||||
struct DeferredAction {
|
||||
TimeUnit delay;
|
||||
std::function<void(void)> action;
|
||||
|
||||
DeferredAction(TimeUnit delay, const std::function<void(void)> &action) : delay(delay), action(std::move(action)) {}
|
||||
};
|
||||
std::vector<DeferredAction> pending_actions_;
|
||||
};
|
||||
|
||||
#endif /* ClockDeferrer_h */
|
||||
@ -52,11 +52,9 @@ template <Analyser::Static::AppleII::Target::Model model> class ConcreteMachine:
|
||||
public:
|
||||
VideoBusHandler(uint8_t *ram, uint8_t *aux_ram) : ram_(ram), aux_ram_(aux_ram) {}
|
||||
|
||||
uint8_t perform_read(uint16_t address) {
|
||||
return ram_[address];
|
||||
}
|
||||
uint16_t perform_aux_read(uint16_t address) {
|
||||
return static_cast<uint16_t>(ram_[address] | (aux_ram_[address] << 8));
|
||||
void perform_read(uint16_t address, size_t count, uint8_t *base_target, uint8_t *auxiliary_target) {
|
||||
memcpy(base_target, &ram_[address], count);
|
||||
memcpy(auxiliary_target, &aux_ram_[address], count);
|
||||
}
|
||||
|
||||
private:
|
||||
|
||||
@ -10,8 +10,10 @@
|
||||
|
||||
using namespace AppleII::Video;
|
||||
|
||||
VideoBase::VideoBase() :
|
||||
crt_(new Outputs::CRT::CRT(910, 1, Outputs::CRT::DisplayType::NTSC60, 1)) {
|
||||
VideoBase::VideoBase(bool is_iie, std::function<void(Cycles)> &&target) :
|
||||
crt_(new Outputs::CRT::CRT(910, 1, Outputs::CRT::DisplayType::NTSC60, 1)),
|
||||
is_iie_(is_iie),
|
||||
deferrer_(std::move(target)) {
|
||||
|
||||
// Set a composite sampling function that assumes one byte per pixel input, and
|
||||
// accepts any non-zero value as being fully on, zero being fully off.
|
||||
@ -23,7 +25,7 @@ VideoBase::VideoBase() :
|
||||
|
||||
// Show only the centre 75% of the TV frame.
|
||||
crt_->set_video_signal(Outputs::CRT::VideoSignal::Composite);
|
||||
crt_->set_visible_area(Outputs::CRT::Rect(0.115f, 0.122f, 0.77f, 0.77f));
|
||||
crt_->set_visible_area(Outputs::CRT::Rect(0.118f, 0.122f, 0.77f, 0.77f));
|
||||
crt_->set_immediate_default_phase(0.0f);
|
||||
}
|
||||
|
||||
@ -35,67 +37,85 @@ Outputs::CRT::CRT *VideoBase::get_crt() {
|
||||
Rote setters and getters.
|
||||
*/
|
||||
void VideoBase::set_alternative_character_set(bool alternative_character_set) {
|
||||
alternative_character_set_ = alternative_character_set;
|
||||
set_alternative_character_set_ = alternative_character_set;
|
||||
deferrer_.defer(Cycles(2), [=] {
|
||||
alternative_character_set_ = alternative_character_set;
|
||||
});
|
||||
}
|
||||
|
||||
bool VideoBase::get_alternative_character_set() {
|
||||
return alternative_character_set_;
|
||||
return set_alternative_character_set_;
|
||||
}
|
||||
|
||||
void VideoBase::set_80_columns(bool columns_80) {
|
||||
columns_80_ = columns_80;
|
||||
set_columns_80_ = columns_80;
|
||||
deferrer_.defer(Cycles(2), [=] {
|
||||
columns_80_ = columns_80;
|
||||
});
|
||||
}
|
||||
|
||||
bool VideoBase::get_80_columns() {
|
||||
return columns_80_;
|
||||
return set_columns_80_;
|
||||
}
|
||||
|
||||
void VideoBase::set_80_store(bool store_80) {
|
||||
store_80_ = store_80;
|
||||
set_store_80_ = store_80_ = store_80;
|
||||
}
|
||||
|
||||
bool VideoBase::get_80_store() {
|
||||
return store_80_;
|
||||
return set_store_80_;
|
||||
}
|
||||
|
||||
void VideoBase::set_page2(bool page2) {
|
||||
page2_ = page2;
|
||||
set_page2_ = page2_ = page2;
|
||||
}
|
||||
|
||||
bool VideoBase::get_page2() {
|
||||
return page2_;
|
||||
return set_page2_;
|
||||
}
|
||||
|
||||
void VideoBase::set_text(bool text) {
|
||||
text_ = text;
|
||||
set_text_ = text;
|
||||
deferrer_.defer(Cycles(2), [=] {
|
||||
text_ = text;
|
||||
});
|
||||
}
|
||||
|
||||
bool VideoBase::get_text() {
|
||||
return text_;
|
||||
return set_text_;
|
||||
}
|
||||
|
||||
void VideoBase::set_mixed(bool mixed) {
|
||||
mixed_ = mixed;
|
||||
set_mixed_ = mixed;
|
||||
deferrer_.defer(Cycles(2), [=] {
|
||||
mixed_ = mixed;
|
||||
});
|
||||
}
|
||||
|
||||
bool VideoBase::get_mixed() {
|
||||
return mixed_;
|
||||
return set_mixed_;
|
||||
}
|
||||
|
||||
void VideoBase::set_high_resolution(bool high_resolution) {
|
||||
high_resolution_ = high_resolution;
|
||||
set_high_resolution_ = high_resolution;
|
||||
deferrer_.defer(Cycles(2), [=] {
|
||||
high_resolution_ = high_resolution;
|
||||
});
|
||||
}
|
||||
|
||||
bool VideoBase::get_high_resolution() {
|
||||
return high_resolution_;
|
||||
return set_high_resolution_;
|
||||
}
|
||||
|
||||
void VideoBase::set_double_high_resolution(bool double_high_resolution) {
|
||||
double_high_resolution_ = double_high_resolution;
|
||||
set_double_high_resolution_ = double_high_resolution;
|
||||
deferrer_.defer(Cycles(2), [=] {
|
||||
double_high_resolution_ = double_high_resolution;
|
||||
});
|
||||
}
|
||||
|
||||
bool VideoBase::get_double_high_resolution() {
|
||||
return double_high_resolution_;
|
||||
return set_double_high_resolution_;
|
||||
}
|
||||
|
||||
void VideoBase::set_character_rom(const std::vector<uint8_t> &character_rom) {
|
||||
@ -115,3 +135,170 @@ void VideoBase::set_character_rom(const std::vector<uint8_t> &character_rom) {
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void VideoBase::output_text(uint8_t *target, uint8_t *source, size_t length, size_t pixel_row) const {
|
||||
const uint8_t inverses[] = {
|
||||
0xff,
|
||||
is_iie_ ? static_cast<uint8_t>(0xff) : static_cast<uint8_t>((flash_ / flash_length) * 0xff),
|
||||
is_iie_ ? static_cast<uint8_t>(0xff) : static_cast<uint8_t>(0x00),
|
||||
is_iie_ ? static_cast<uint8_t>(0xff) : static_cast<uint8_t>(0x00)
|
||||
};
|
||||
const int or_mask = alternative_character_set_ ? 0x100 : 0x000;
|
||||
const int and_mask = is_iie_ ? ~0 : 0x3f;
|
||||
|
||||
for(size_t c = 0; c < length; ++c) {
|
||||
const int character = (source[c] | or_mask) & and_mask;
|
||||
const uint8_t xor_mask = inverses[character >> 6];
|
||||
const std::size_t character_address = static_cast<std::size_t>(character << 3) + pixel_row;
|
||||
const uint8_t character_pattern = character_rom_[character_address] ^ xor_mask;
|
||||
|
||||
// The character ROM is output MSB to LSB rather than LSB to MSB.
|
||||
target[0] = target[1] = character_pattern & 0x40;
|
||||
target[2] = target[3] = character_pattern & 0x20;
|
||||
target[4] = target[5] = character_pattern & 0x10;
|
||||
target[6] = target[7] = character_pattern & 0x08;
|
||||
target[8] = target[9] = character_pattern & 0x04;
|
||||
target[10] = target[11] = character_pattern & 0x02;
|
||||
target[12] = target[13] = character_pattern & 0x01;
|
||||
graphics_carry_ = character_pattern & 0x01;
|
||||
target += 14;
|
||||
}
|
||||
}
|
||||
|
||||
void VideoBase::output_double_text(uint8_t *target, uint8_t *source, uint8_t *auxiliary_source, size_t length, size_t pixel_row) const {
|
||||
for(size_t c = 0; c < length; ++c) {
|
||||
const std::size_t character_addresses[2] = {
|
||||
static_cast<std::size_t>(
|
||||
auxiliary_source[c] << 3
|
||||
) + pixel_row,
|
||||
static_cast<std::size_t>(
|
||||
source[c] << 3
|
||||
) + pixel_row,
|
||||
};
|
||||
|
||||
const size_t pattern_offset = alternative_character_set_ ? (256*8) : 0;
|
||||
const uint8_t character_patterns[2] = {
|
||||
character_rom_[character_addresses[0] + pattern_offset],
|
||||
character_rom_[character_addresses[1] + pattern_offset],
|
||||
};
|
||||
|
||||
// The character ROM is output MSB to LSB rather than LSB to MSB.
|
||||
target[0] = character_patterns[0] & 0x40;
|
||||
target[1] = character_patterns[0] & 0x20;
|
||||
target[2] = character_patterns[0] & 0x10;
|
||||
target[3] = character_patterns[0] & 0x08;
|
||||
target[4] = character_patterns[0] & 0x04;
|
||||
target[5] = character_patterns[0] & 0x02;
|
||||
target[6] = character_patterns[0] & 0x01;
|
||||
target[7] = character_patterns[1] & 0x40;
|
||||
target[8] = character_patterns[1] & 0x20;
|
||||
target[9] = character_patterns[1] & 0x10;
|
||||
target[10] = character_patterns[1] & 0x08;
|
||||
target[11] = character_patterns[1] & 0x04;
|
||||
target[12] = character_patterns[1] & 0x02;
|
||||
target[13] = character_patterns[1] & 0x01;
|
||||
graphics_carry_ = character_patterns[1] & 0x01;
|
||||
target += 14;
|
||||
}
|
||||
}
|
||||
|
||||
void VideoBase::output_low_resolution(uint8_t *target, uint8_t *source, size_t length, int column, int row) const {
|
||||
const int row_shift = row&4;
|
||||
for(size_t c = 0; c < length; ++c) {
|
||||
// Low-resolution graphics mode shifts the colour code on a loop, but has to account for whether this
|
||||
// 14-sample output window is starting at the beginning of a colour cycle or halfway through.
|
||||
if((column + static_cast<int>(c))&1) {
|
||||
target[0] = target[4] = target[8] = target[12] = (source[c] >> row_shift) & 4;
|
||||
target[1] = target[5] = target[9] = target[13] = (source[c] >> row_shift) & 8;
|
||||
target[2] = target[6] = target[10] = (source[c] >> row_shift) & 1;
|
||||
target[3] = target[7] = target[11] = (source[c] >> row_shift) & 2;
|
||||
graphics_carry_ = (source[c] >> row_shift) & 8;
|
||||
} else {
|
||||
target[0] = target[4] = target[8] = target[12] = (source[c] >> row_shift) & 1;
|
||||
target[1] = target[5] = target[9] = target[13] = (source[c] >> row_shift) & 2;
|
||||
target[2] = target[6] = target[10] = (source[c] >> row_shift) & 4;
|
||||
target[3] = target[7] = target[11] = (source[c] >> row_shift) & 8;
|
||||
graphics_carry_ = (source[c] >> row_shift) & 2;
|
||||
}
|
||||
target += 14;
|
||||
}
|
||||
}
|
||||
|
||||
void VideoBase::output_double_low_resolution(uint8_t *target, uint8_t *source, uint8_t *auxiliary_source, size_t length, int column, int row) const {
|
||||
const int row_shift = row&4;
|
||||
for(size_t c = 0; c < length; ++c) {
|
||||
if((column + static_cast<int>(c))&1) {
|
||||
target[0] = target[4] = (auxiliary_source[c] >> row_shift) & 2;
|
||||
target[1] = target[5] = (auxiliary_source[c] >> row_shift) & 4;
|
||||
target[2] = target[6] = (auxiliary_source[c] >> row_shift) & 8;
|
||||
target[3] = (auxiliary_source[c] >> row_shift) & 1;
|
||||
|
||||
target[8] = target[12] = (source[c] >> row_shift) & 4;
|
||||
target[9] = target[13] = (source[c] >> row_shift) & 8;
|
||||
target[10] = (source[c] >> row_shift) & 1;
|
||||
target[7] = target[11] = (source[c] >> row_shift) & 2;
|
||||
graphics_carry_ = (source[c] >> row_shift) & 8;
|
||||
} else {
|
||||
target[0] = target[4] = (auxiliary_source[c] >> row_shift) & 8;
|
||||
target[1] = target[5] = (auxiliary_source[c] >> row_shift) & 1;
|
||||
target[2] = target[6] = (auxiliary_source[c] >> row_shift) & 2;
|
||||
target[3] = (auxiliary_source[c] >> row_shift) & 4;
|
||||
|
||||
target[8] = target[12] = (source[c] >> row_shift) & 1;
|
||||
target[9] = target[13] = (source[c] >> row_shift) & 2;
|
||||
target[10] = (source[c] >> row_shift) & 4;
|
||||
target[7] = target[11] = (source[c] >> row_shift) & 8;
|
||||
graphics_carry_ = (source[c] >> row_shift) & 2;
|
||||
}
|
||||
target += 14;
|
||||
}
|
||||
}
|
||||
|
||||
void VideoBase::output_high_resolution(uint8_t *target, uint8_t *source, size_t length) const {
|
||||
for(size_t c = 0; c < length; ++c) {
|
||||
// High resolution graphics shift out LSB to MSB, optionally with a delay of half a pixel.
|
||||
// If there is a delay, the previous output level is held to bridge the gap.
|
||||
if(source[c] & 0x80) {
|
||||
target[0] = graphics_carry_;
|
||||
target[1] = target[2] = source[c] & 0x01;
|
||||
target[3] = target[4] = source[c] & 0x02;
|
||||
target[5] = target[6] = source[c] & 0x04;
|
||||
target[7] = target[8] = source[c] & 0x08;
|
||||
target[9] = target[10] = source[c] & 0x10;
|
||||
target[11] = target[12] = source[c] & 0x20;
|
||||
target[13] = source[c] & 0x40;
|
||||
} else {
|
||||
target[0] = target[1] = source[c] & 0x01;
|
||||
target[2] = target[3] = source[c] & 0x02;
|
||||
target[4] = target[5] = source[c] & 0x04;
|
||||
target[6] = target[7] = source[c] & 0x08;
|
||||
target[8] = target[9] = source[c] & 0x10;
|
||||
target[10] = target[11] = source[c] & 0x20;
|
||||
target[12] = target[13] = source[c] & 0x40;
|
||||
}
|
||||
graphics_carry_ = source[c] & 0x40;
|
||||
target += 14;
|
||||
}
|
||||
}
|
||||
|
||||
void VideoBase::output_double_high_resolution(uint8_t *target, uint8_t *source, uint8_t *auxiliary_source, size_t length) const {
|
||||
for(size_t c = 0; c < length; ++c) {
|
||||
target[0] = auxiliary_source[c] & 0x01;
|
||||
target[1] = auxiliary_source[c] & 0x02;
|
||||
target[2] = auxiliary_source[c] & 0x04;
|
||||
target[3] = auxiliary_source[c] & 0x08;
|
||||
target[4] = auxiliary_source[c] & 0x10;
|
||||
target[5] = auxiliary_source[c] & 0x20;
|
||||
target[6] = auxiliary_source[c] & 0x40;
|
||||
target[7] = source[c] & 0x01;
|
||||
target[8] = source[c] & 0x02;
|
||||
target[9] = source[c] & 0x04;
|
||||
target[10] = source[c] & 0x08;
|
||||
target[11] = source[c] & 0x10;
|
||||
target[12] = source[c] & 0x20;
|
||||
target[13] = source[c] & 0x40;
|
||||
|
||||
graphics_carry_ = auxiliary_source[c] & 0x40;
|
||||
target += 14;
|
||||
}
|
||||
}
|
||||
|
||||
@ -11,7 +11,9 @@
|
||||
|
||||
#include "../../Outputs/CRT/CRT.hpp"
|
||||
#include "../../ClockReceiver/ClockReceiver.hpp"
|
||||
#include "../../ClockReceiver/ClockDeferrer.hpp"
|
||||
|
||||
#include <array>
|
||||
#include <vector>
|
||||
|
||||
namespace AppleII {
|
||||
@ -20,25 +22,19 @@ namespace Video {
|
||||
class BusHandler {
|
||||
public:
|
||||
/*!
|
||||
Reads an 8-bit value from the ordinary II/II+ memory pool.
|
||||
*/
|
||||
uint8_t perform_read(uint16_t address) {
|
||||
return 0xff;
|
||||
}
|
||||
Requests fetching of the @c count bytes starting from @c address.
|
||||
|
||||
/*!
|
||||
Reads two 8-bit values, from the same address — one from
|
||||
main RAM, one from auxiliary. Should return as
|
||||
(main) | (aux << 8).
|
||||
The handler should write the values from base memory to @c base_target, and those
|
||||
from auxiliary memory to @c auxiliary_target. If the machine has no axiliary memory,
|
||||
it needn't write anything to auxiliary_target.
|
||||
*/
|
||||
uint16_t perform_aux_read(uint16_t address) {
|
||||
return 0xffff;
|
||||
void perform_read(uint16_t address, size_t count, uint8_t *base_target, uint8_t *auxiliary_target) {
|
||||
}
|
||||
};
|
||||
|
||||
class VideoBase {
|
||||
public:
|
||||
VideoBase();
|
||||
VideoBase(bool is_iie, std::function<void(Cycles)> &&target);
|
||||
|
||||
/// @returns The CRT this video feed is feeding.
|
||||
Outputs::CRT::CRT *get_crt();
|
||||
@ -153,350 +149,98 @@ class VideoBase {
|
||||
|
||||
// State affecting output video stream generation.
|
||||
uint8_t *pixel_pointer_ = nullptr;
|
||||
int pixel_pointer_column_ = 0;
|
||||
bool pixels_are_high_density_ = false;
|
||||
|
||||
// State affecting logical state.
|
||||
int row_ = 0, column_ = 0, flash_ = 0;
|
||||
|
||||
// Enumerates all Apple II and IIe display modes.
|
||||
enum class GraphicsMode {
|
||||
LowRes,
|
||||
LowRes = 0,
|
||||
DoubleLowRes,
|
||||
HighRes,
|
||||
DoubleHighRes,
|
||||
Text,
|
||||
DoubleText
|
||||
DoubleText,
|
||||
};
|
||||
bool is_text_mode(GraphicsMode m) { return m >= GraphicsMode::Text; }
|
||||
bool is_double_mode(GraphicsMode m) { return !!(static_cast<int>(m)&1); }
|
||||
|
||||
// Various soft-switch values.
|
||||
bool alternative_character_set_ = false;
|
||||
bool columns_80_ = false;
|
||||
bool store_80_ = false;
|
||||
bool page2_ = false;
|
||||
bool text_ = true;
|
||||
bool mixed_ = false;
|
||||
bool high_resolution_ = false;
|
||||
bool double_high_resolution_ = false;
|
||||
bool alternative_character_set_ = false, set_alternative_character_set_ = false;
|
||||
bool columns_80_ = false, set_columns_80_ = false;
|
||||
bool store_80_ = false, set_store_80_ = false;
|
||||
bool page2_ = false, set_page2_ = false;
|
||||
bool text_ = true, set_text_ = true;
|
||||
bool mixed_ = false, set_mixed_ = false;
|
||||
bool high_resolution_ = false, set_high_resolution_ = false;
|
||||
bool double_high_resolution_ = false, set_double_high_resolution_ = false;
|
||||
|
||||
// Graphics carry is the final level output in a fetch window;
|
||||
// it carries on into the next if it's high resolution with
|
||||
// the delay bit set.
|
||||
uint8_t graphics_carry_ = 0;
|
||||
mutable uint8_t graphics_carry_ = 0;
|
||||
bool was_double_ = false;
|
||||
|
||||
// This holds a copy of the character ROM. The regular character
|
||||
// set is assumed to be in the first 64*8 bytes; the alternative
|
||||
// is in the 128*8 bytes after that.
|
||||
std::vector<uint8_t> character_rom_;
|
||||
|
||||
// Memory is fetched ahead of time into this array;
|
||||
// this permits the correct delay between fetching
|
||||
// without having to worry about a rolling buffer.
|
||||
std::array<uint8_t, 40> base_stream_;
|
||||
std::array<uint8_t, 40> auxiliary_stream_;
|
||||
|
||||
bool is_iie_ = false;
|
||||
static const int flash_length = 8406;
|
||||
|
||||
/*!
|
||||
Outputs 40-column text to @c target, using @c length bytes from @c source.
|
||||
*/
|
||||
void output_text(uint8_t *target, uint8_t *source, size_t length, size_t pixel_row) const;
|
||||
|
||||
/*!
|
||||
Outputs 80-column text to @c target, drawing @c length columns from @c source and @c auxiliary_source.
|
||||
*/
|
||||
void output_double_text(uint8_t *target, uint8_t *source, uint8_t *auxiliary_source, size_t length, size_t pixel_row) const;
|
||||
|
||||
/*!
|
||||
Outputs 40-column low-resolution graphics to @c target, drawing @c length columns from @c source.
|
||||
*/
|
||||
void output_low_resolution(uint8_t *target, uint8_t *source, size_t length, int column, int row) const;
|
||||
|
||||
/*!
|
||||
Outputs 80-column low-resolution graphics to @c target, drawing @c length columns from @c source and @c auxiliary_source.
|
||||
*/
|
||||
void output_double_low_resolution(uint8_t *target, uint8_t *source, uint8_t *auxiliary_source, size_t length, int column, int row) const;
|
||||
|
||||
/*!
|
||||
Outputs 40-column high-resolution graphics to @c target, drawing @c length columns from @c source.
|
||||
*/
|
||||
void output_high_resolution(uint8_t *target, uint8_t *source, size_t length) const;
|
||||
|
||||
/*!
|
||||
Outputs 80-column double-high-resolution graphics to @c target, drawing @c length columns from @c source.
|
||||
*/
|
||||
void output_double_high_resolution(uint8_t *target, uint8_t *source, uint8_t *auxiliary_source, size_t length) const;
|
||||
|
||||
// Maintain a ClockDeferrer for delayed mode switches.
|
||||
ClockDeferrer<Cycles> deferrer_;
|
||||
};
|
||||
|
||||
template <class BusHandler, bool is_iie> class Video: public VideoBase {
|
||||
public:
|
||||
/// Constructs an instance of the video feed; a CRT is also created.
|
||||
Video(BusHandler &bus_handler) :
|
||||
VideoBase(),
|
||||
VideoBase(is_iie, [=] (Cycles cycles) { advance(cycles); }),
|
||||
bus_handler_(bus_handler) {}
|
||||
|
||||
/*!
|
||||
Advances time by @c cycles; expects to be fed by the CPU clock.
|
||||
Implicitly adds an extra half a colour clock at the end of every
|
||||
line.
|
||||
Runs video for @c cycles.
|
||||
*/
|
||||
void run_for(const Cycles cycles) {
|
||||
/*
|
||||
Addressing scheme used throughout is that column 0 is the first column with pixels in it;
|
||||
row 0 is the first row with pixels in it.
|
||||
|
||||
A frame is oriented around 65 cycles across, 262 lines down.
|
||||
*/
|
||||
static const int first_sync_line = 220; // A complete guess. Information needed.
|
||||
static const int first_sync_column = 49; // Also a guess.
|
||||
static const int sync_length = 4; // One of the two likely candidates.
|
||||
|
||||
int int_cycles = cycles.as_int();
|
||||
while(int_cycles) {
|
||||
const int cycles_this_line = std::min(65 - column_, int_cycles);
|
||||
const int ending_column = column_ + cycles_this_line;
|
||||
|
||||
if(row_ >= first_sync_line && row_ < first_sync_line + 3) {
|
||||
// In effect apply an XOR to HSYNC and VSYNC flags in order to include equalising
|
||||
// pulses (and hencce keep hsync approximately where it should be during vsync).
|
||||
const int blank_start = std::max(first_sync_column - sync_length, column_);
|
||||
const int blank_end = std::min(first_sync_column, ending_column);
|
||||
if(blank_end > blank_start) {
|
||||
if(blank_start > column_) {
|
||||
crt_->output_sync(static_cast<unsigned int>(blank_start - column_) * 14);
|
||||
}
|
||||
crt_->output_blank(static_cast<unsigned int>(blank_end - blank_start) * 14);
|
||||
if(blank_end < ending_column) {
|
||||
crt_->output_sync(static_cast<unsigned int>(ending_column - blank_end) * 14);
|
||||
}
|
||||
} else {
|
||||
crt_->output_sync(static_cast<unsigned int>(cycles_this_line) * 14);
|
||||
}
|
||||
} else {
|
||||
const GraphicsMode line_mode = graphics_mode(row_);
|
||||
|
||||
// The first 40 columns are submitted to the CRT only upon completion;
|
||||
// they'll be either graphics or blank, depending on which side we are
|
||||
// of line 192.
|
||||
if(column_ < 40) {
|
||||
if(row_ < 192) {
|
||||
const bool requires_high_density = line_mode != GraphicsMode::Text;
|
||||
if(!column_ || requires_high_density != pixels_are_high_density_) {
|
||||
if(column_) output_data_to_column(column_);
|
||||
pixel_pointer_ = crt_->allocate_write_area(561);
|
||||
pixel_pointer_column_ = column_;
|
||||
pixels_are_high_density_ = requires_high_density;
|
||||
graphics_carry_ = 0;
|
||||
}
|
||||
|
||||
const int pixel_end = std::min(40, ending_column);
|
||||
const int character_row = row_ >> 3;
|
||||
const int pixel_row = row_ & 7;
|
||||
const uint16_t row_address = static_cast<uint16_t>((character_row >> 3) * 40 + ((character_row&7) << 7));
|
||||
const uint16_t text_address = static_cast<uint16_t>(((video_page()+1) * 0x400) + row_address);
|
||||
|
||||
switch(line_mode) {
|
||||
case GraphicsMode::Text: {
|
||||
const uint8_t inverses[] = {
|
||||
0xff,
|
||||
static_cast<uint8_t>((flash_ / flash_length) * 0xff),
|
||||
0x00,
|
||||
0x00
|
||||
};
|
||||
for(int c = column_; c < pixel_end; ++c) {
|
||||
int character = bus_handler_.perform_read(static_cast<uint16_t>(text_address + c));
|
||||
if(is_iie) {
|
||||
character |= alternative_character_set_ ? 0x100 : 0;
|
||||
} else {
|
||||
character &= 0x3f;
|
||||
|
||||
}
|
||||
const uint8_t xor_mask = is_iie ? 0xff : inverses[character >> 6];
|
||||
const std::size_t character_address = static_cast<std::size_t>((character << 3) + pixel_row);
|
||||
const uint8_t character_pattern = character_rom_[character_address] ^ xor_mask;
|
||||
|
||||
// The character ROM is output MSB to LSB rather than LSB to MSB.
|
||||
pixel_pointer_[0] = character_pattern & 0x40;
|
||||
pixel_pointer_[1] = character_pattern & 0x20;
|
||||
pixel_pointer_[2] = character_pattern & 0x10;
|
||||
pixel_pointer_[3] = character_pattern & 0x08;
|
||||
pixel_pointer_[4] = character_pattern & 0x04;
|
||||
pixel_pointer_[5] = character_pattern & 0x02;
|
||||
pixel_pointer_[6] = character_pattern & 0x01;
|
||||
graphics_carry_ = character_pattern & 0x01;
|
||||
pixel_pointer_ += 7;
|
||||
}
|
||||
} break;
|
||||
|
||||
case GraphicsMode::DoubleText: {
|
||||
for(int c = column_; c < pixel_end; ++c) {
|
||||
const uint16_t characters = bus_handler_.perform_aux_read(static_cast<uint16_t>(text_address + c));
|
||||
const std::size_t character_addresses[2] = {
|
||||
static_cast<std::size_t>(
|
||||
(((characters >> 8)) << 3) + pixel_row
|
||||
),
|
||||
static_cast<std::size_t>(
|
||||
(characters << 3) + pixel_row
|
||||
),
|
||||
};
|
||||
|
||||
const size_t pattern_offset = alternative_character_set_ ? (256*8) : 0;
|
||||
const uint8_t character_patterns[2] = {
|
||||
character_rom_[character_addresses[0] + pattern_offset],
|
||||
character_rom_[character_addresses[1] + pattern_offset],
|
||||
};
|
||||
|
||||
// The character ROM is output MSB to LSB rather than LSB to MSB.
|
||||
pixel_pointer_[0] = character_patterns[0] & 0x40;
|
||||
pixel_pointer_[1] = character_patterns[0] & 0x20;
|
||||
pixel_pointer_[2] = character_patterns[0] & 0x10;
|
||||
pixel_pointer_[3] = character_patterns[0] & 0x08;
|
||||
pixel_pointer_[4] = character_patterns[0] & 0x04;
|
||||
pixel_pointer_[5] = character_patterns[0] & 0x02;
|
||||
pixel_pointer_[6] = character_patterns[0] & 0x01;
|
||||
pixel_pointer_[7] = character_patterns[1] & 0x40;
|
||||
pixel_pointer_[8] = character_patterns[1] & 0x20;
|
||||
pixel_pointer_[9] = character_patterns[1] & 0x10;
|
||||
pixel_pointer_[10] = character_patterns[1] & 0x08;
|
||||
pixel_pointer_[11] = character_patterns[1] & 0x04;
|
||||
pixel_pointer_[12] = character_patterns[1] & 0x02;
|
||||
pixel_pointer_[13] = character_patterns[1] & 0x01;
|
||||
graphics_carry_ = character_patterns[1] & 0x01;
|
||||
pixel_pointer_ += 14;
|
||||
}
|
||||
} break;
|
||||
|
||||
case GraphicsMode::DoubleLowRes: {
|
||||
const int row_shift = (row_&4);
|
||||
for(int c = column_; c < pixel_end; ++c) {
|
||||
const uint16_t nibble = bus_handler_.perform_aux_read(static_cast<uint16_t>(text_address + c)) >> row_shift;
|
||||
|
||||
if(c&1) {
|
||||
pixel_pointer_[0] = pixel_pointer_[4] = (nibble >> 8) & 2;
|
||||
pixel_pointer_[1] = pixel_pointer_[5] = (nibble >> 8) & 4;
|
||||
pixel_pointer_[2] = pixel_pointer_[6] = (nibble >> 8) & 8;
|
||||
pixel_pointer_[3] = (nibble >> 8) & 1;
|
||||
|
||||
pixel_pointer_[8] = pixel_pointer_[12] = nibble & 4;
|
||||
pixel_pointer_[9] = pixel_pointer_[13] = nibble & 8;
|
||||
pixel_pointer_[10] = nibble & 1;
|
||||
pixel_pointer_[7] = pixel_pointer_[11] = nibble & 2;
|
||||
graphics_carry_ = nibble & 8;
|
||||
} else {
|
||||
pixel_pointer_[0] = pixel_pointer_[4] = (nibble >> 8) & 8;
|
||||
pixel_pointer_[1] = pixel_pointer_[5] = (nibble >> 8) & 1;
|
||||
pixel_pointer_[2] = pixel_pointer_[6] = (nibble >> 8) & 2;
|
||||
pixel_pointer_[3] = (nibble >> 8) & 4;
|
||||
|
||||
pixel_pointer_[8] = pixel_pointer_[12] = nibble & 1;
|
||||
pixel_pointer_[9] = pixel_pointer_[13] = nibble & 2;
|
||||
pixel_pointer_[10] = nibble & 4;
|
||||
pixel_pointer_[7] = pixel_pointer_[11] = nibble & 8;
|
||||
graphics_carry_ = nibble & 2;
|
||||
}
|
||||
pixel_pointer_ += 14;
|
||||
}
|
||||
} break;
|
||||
|
||||
case GraphicsMode::LowRes: {
|
||||
const int row_shift = (row_&4);
|
||||
// TODO: decompose into two loops, possibly.
|
||||
for(int c = column_; c < pixel_end; ++c) {
|
||||
const uint8_t nibble = (bus_handler_.perform_read(static_cast<uint16_t>(text_address + c)) >> row_shift) & 0x0f;
|
||||
|
||||
// Low-resolution graphics mode shifts the colour code on a loop, but has to account for whether this
|
||||
// 14-sample output window is starting at the beginning of a colour cycle or halfway through.
|
||||
if(c&1) {
|
||||
pixel_pointer_[0] = pixel_pointer_[4] = pixel_pointer_[8] = pixel_pointer_[12] = nibble & 4;
|
||||
pixel_pointer_[1] = pixel_pointer_[5] = pixel_pointer_[9] = pixel_pointer_[13] = nibble & 8;
|
||||
pixel_pointer_[2] = pixel_pointer_[6] = pixel_pointer_[10] = nibble & 1;
|
||||
pixel_pointer_[3] = pixel_pointer_[7] = pixel_pointer_[11] = nibble & 2;
|
||||
graphics_carry_ = nibble & 8;
|
||||
} else {
|
||||
pixel_pointer_[0] = pixel_pointer_[4] = pixel_pointer_[8] = pixel_pointer_[12] = nibble & 1;
|
||||
pixel_pointer_[1] = pixel_pointer_[5] = pixel_pointer_[9] = pixel_pointer_[13] = nibble & 2;
|
||||
pixel_pointer_[2] = pixel_pointer_[6] = pixel_pointer_[10] = nibble & 4;
|
||||
pixel_pointer_[3] = pixel_pointer_[7] = pixel_pointer_[11] = nibble & 8;
|
||||
graphics_carry_ = nibble & 2;
|
||||
}
|
||||
pixel_pointer_ += 14;
|
||||
}
|
||||
} break;
|
||||
|
||||
case GraphicsMode::HighRes: {
|
||||
const uint16_t graphics_address = static_cast<uint16_t>(((video_page()+1) * 0x2000) + row_address + ((pixel_row&7) << 10));
|
||||
for(int c = column_; c < pixel_end; ++c) {
|
||||
const uint8_t graphic = bus_handler_.perform_read(static_cast<uint16_t>(graphics_address + c));
|
||||
|
||||
// High resolution graphics shift out LSB to MSB, optionally with a delay of half a pixel.
|
||||
// If there is a delay, the previous output level is held to bridge the gap.
|
||||
if(graphic & 0x80) {
|
||||
pixel_pointer_[0] = graphics_carry_;
|
||||
pixel_pointer_[1] = pixel_pointer_[2] = graphic & 0x01;
|
||||
pixel_pointer_[3] = pixel_pointer_[4] = graphic & 0x02;
|
||||
pixel_pointer_[5] = pixel_pointer_[6] = graphic & 0x04;
|
||||
pixel_pointer_[7] = pixel_pointer_[8] = graphic & 0x08;
|
||||
pixel_pointer_[9] = pixel_pointer_[10] = graphic & 0x10;
|
||||
pixel_pointer_[11] = pixel_pointer_[12] = graphic & 0x20;
|
||||
pixel_pointer_[13] = graphic & 0x40;
|
||||
} else {
|
||||
pixel_pointer_[0] = pixel_pointer_[1] = graphic & 0x01;
|
||||
pixel_pointer_[2] = pixel_pointer_[3] = graphic & 0x02;
|
||||
pixel_pointer_[4] = pixel_pointer_[5] = graphic & 0x04;
|
||||
pixel_pointer_[6] = pixel_pointer_[7] = graphic & 0x08;
|
||||
pixel_pointer_[8] = pixel_pointer_[9] = graphic & 0x10;
|
||||
pixel_pointer_[10] = pixel_pointer_[11] = graphic & 0x20;
|
||||
pixel_pointer_[12] = pixel_pointer_[13] = graphic & 0x40;
|
||||
}
|
||||
graphics_carry_ = graphic & 0x40;
|
||||
pixel_pointer_ += 14;
|
||||
}
|
||||
} break;
|
||||
|
||||
case GraphicsMode::DoubleHighRes: {
|
||||
const uint16_t graphics_address = static_cast<uint16_t>(((video_page()+1) * 0x2000) + row_address + ((pixel_row&7) << 10));
|
||||
for(int c = column_; c < pixel_end; ++c) {
|
||||
const uint16_t graphic = bus_handler_.perform_aux_read(static_cast<uint16_t>(graphics_address + c));
|
||||
|
||||
pixel_pointer_[0] = graphics_carry_;
|
||||
pixel_pointer_[1] = (graphic >> 8) & 0x01;
|
||||
pixel_pointer_[2] = (graphic >> 8) & 0x02;
|
||||
pixel_pointer_[3] = (graphic >> 8) & 0x04;
|
||||
pixel_pointer_[4] = (graphic >> 8) & 0x08;
|
||||
pixel_pointer_[5] = (graphic >> 8) & 0x10;
|
||||
pixel_pointer_[6] = (graphic >> 8) & 0x20;
|
||||
pixel_pointer_[7] = (graphic >> 8) & 0x40;
|
||||
pixel_pointer_[8] = graphic & 0x01;
|
||||
pixel_pointer_[9] = graphic & 0x02;
|
||||
pixel_pointer_[10] = graphic & 0x04;
|
||||
pixel_pointer_[11] = graphic & 0x08;
|
||||
pixel_pointer_[12] = graphic & 0x10;
|
||||
pixel_pointer_[13] = graphic & 0x20;
|
||||
graphics_carry_ = graphic & 0x40;
|
||||
pixel_pointer_ += 14;
|
||||
}
|
||||
} break;
|
||||
}
|
||||
|
||||
if(ending_column >= 40) {
|
||||
output_data_to_column(40);
|
||||
}
|
||||
} else {
|
||||
if(ending_column >= 40) {
|
||||
crt_->output_blank(560);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
The left border, sync, right border pattern doesn't depend on whether
|
||||
there were pixels this row and is output as soon as it is known.
|
||||
*/
|
||||
|
||||
const int first_blank_start = std::max(40, column_);
|
||||
const int first_blank_end = std::min(first_sync_column, ending_column);
|
||||
if(first_blank_end > first_blank_start) {
|
||||
crt_->output_blank(static_cast<unsigned int>(first_blank_end - first_blank_start) * 14);
|
||||
}
|
||||
|
||||
const int sync_start = std::max(first_sync_column, column_);
|
||||
const int sync_end = std::min(first_sync_column + sync_length, ending_column);
|
||||
if(sync_end > sync_start) {
|
||||
crt_->output_sync(static_cast<unsigned int>(sync_end - sync_start) * 14);
|
||||
}
|
||||
|
||||
int second_blank_start;
|
||||
if(!is_text_mode(graphics_mode(row_+1))) {
|
||||
const int colour_burst_start = std::max(first_sync_column + sync_length + 1, column_);
|
||||
const int colour_burst_end = std::min(first_sync_column + sync_length + 4, ending_column);
|
||||
if(colour_burst_end > colour_burst_start) {
|
||||
crt_->output_colour_burst(static_cast<unsigned int>(colour_burst_end - colour_burst_start) * 14, 128);
|
||||
}
|
||||
|
||||
second_blank_start = std::max(first_sync_column + 7, column_);
|
||||
} else {
|
||||
second_blank_start = std::max(first_sync_column + 4, column_);
|
||||
}
|
||||
|
||||
if(ending_column > second_blank_start) {
|
||||
crt_->output_blank(static_cast<unsigned int>(ending_column - second_blank_start) * 14);
|
||||
}
|
||||
}
|
||||
|
||||
int_cycles -= cycles_this_line;
|
||||
column_ = (column_ + cycles_this_line) % 65;
|
||||
if(!column_) {
|
||||
row_ = (row_ + 1) % 262;
|
||||
flash_ = (flash_ + 1) % (2 * flash_length);
|
||||
|
||||
// Add an extra half a colour cycle of blank; this isn't counted in the run_for
|
||||
// count explicitly but is promised.
|
||||
crt_->output_blank(2);
|
||||
}
|
||||
}
|
||||
void run_for(Cycles cycles) {
|
||||
deferrer_.run_for(cycles);
|
||||
}
|
||||
|
||||
/*!
|
||||
@ -534,7 +278,9 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
|
||||
|
||||
// Calculate the address and return the value.
|
||||
uint16_t read_address = static_cast<uint16_t>(get_row_address(mapped_row) + mapped_column - 25);
|
||||
return bus_handler_.perform_read(read_address);
|
||||
uint8_t value, aux_value;
|
||||
bus_handler_.perform_read(read_address, 1, &value, &aux_value);
|
||||
return value;
|
||||
}
|
||||
|
||||
/*!
|
||||
@ -555,6 +301,228 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
|
||||
}
|
||||
|
||||
private:
|
||||
/*!
|
||||
Advances time by @c cycles; expects to be fed by the CPU clock.
|
||||
Implicitly adds an extra half a colour clock at the end of
|
||||
line.
|
||||
*/
|
||||
void advance(Cycles cycles) {
|
||||
/*
|
||||
Addressing scheme used throughout is that column 0 is the first column with pixels in it;
|
||||
row 0 is the first row with pixels in it.
|
||||
|
||||
A frame is oriented around 65 cycles across, 262 lines down.
|
||||
*/
|
||||
static const int first_sync_line = 220; // A complete guess. Information needed.
|
||||
static const int first_sync_column = 49; // Also a guess.
|
||||
static const int sync_length = 4; // One of the two likely candidates.
|
||||
|
||||
int int_cycles = cycles.as_int();
|
||||
while(int_cycles) {
|
||||
const int cycles_this_line = std::min(65 - column_, int_cycles);
|
||||
const int ending_column = column_ + cycles_this_line;
|
||||
|
||||
if(row_ >= first_sync_line && row_ < first_sync_line + 3) {
|
||||
// In effect apply an XOR to HSYNC and VSYNC flags in order to include equalising
|
||||
// pulses (and hencce keep hsync approximately where it should be during vsync).
|
||||
const int blank_start = std::max(first_sync_column - sync_length, column_);
|
||||
const int blank_end = std::min(first_sync_column, ending_column);
|
||||
if(blank_end > blank_start) {
|
||||
if(blank_start > column_) {
|
||||
crt_->output_sync(static_cast<unsigned int>(blank_start - column_) * 14);
|
||||
}
|
||||
crt_->output_blank(static_cast<unsigned int>(blank_end - blank_start) * 14);
|
||||
if(blank_end < ending_column) {
|
||||
crt_->output_sync(static_cast<unsigned int>(ending_column - blank_end) * 14);
|
||||
}
|
||||
} else {
|
||||
crt_->output_sync(static_cast<unsigned int>(cycles_this_line) * 14);
|
||||
}
|
||||
} else {
|
||||
const GraphicsMode line_mode = graphics_mode(row_);
|
||||
|
||||
// Determine whether there's any fetching to do. Fetching occurs during the first
|
||||
// 40 columns of rows prior to 192.
|
||||
if(row_ < 192 && column_ < 40) {
|
||||
const int character_row = row_ >> 3;
|
||||
const uint16_t row_address = static_cast<uint16_t>((character_row >> 3) * 40 + ((character_row&7) << 7));
|
||||
|
||||
// Grab the memory contents that'll be needed momentarily.
|
||||
const int fetch_end = std::min(40, ending_column);
|
||||
uint16_t fetch_address;
|
||||
switch(line_mode) {
|
||||
case GraphicsMode::Text:
|
||||
case GraphicsMode::DoubleText:
|
||||
case GraphicsMode::LowRes:
|
||||
case GraphicsMode::DoubleLowRes: {
|
||||
const uint16_t text_address = static_cast<uint16_t>(((video_page()+1) * 0x400) + row_address);
|
||||
fetch_address = static_cast<uint16_t>(text_address + column_);
|
||||
} break;
|
||||
|
||||
case GraphicsMode::HighRes:
|
||||
case GraphicsMode::DoubleHighRes:
|
||||
fetch_address = static_cast<uint16_t>(((video_page()+1) * 0x2000) + row_address + ((row_&7) << 10) + column_);
|
||||
break;
|
||||
}
|
||||
|
||||
bus_handler_.perform_read(
|
||||
fetch_address,
|
||||
static_cast<size_t>(fetch_end - column_),
|
||||
&base_stream_[static_cast<size_t>(column_)],
|
||||
&auxiliary_stream_[static_cast<size_t>(column_)]);
|
||||
// TODO: should character modes be mapped to character pixel outputs here?
|
||||
}
|
||||
|
||||
if(row_ < 192) {
|
||||
// The pixel area is the first 40.5 columns; base contents
|
||||
// remain where they would naturally be but auxiliary
|
||||
// graphics appear to the left of that.
|
||||
if(!column_) {
|
||||
pixel_pointer_ = crt_->allocate_write_area(568);
|
||||
graphics_carry_ = 0;
|
||||
was_double_ = true;
|
||||
}
|
||||
|
||||
if(column_ < 40) {
|
||||
const int pixel_start = std::max(0, column_);
|
||||
const int pixel_end = std::min(40, ending_column);
|
||||
const int pixel_row = row_ & 7;
|
||||
|
||||
const bool is_double = Video::is_double_mode(line_mode);
|
||||
if(!is_double && was_double_) {
|
||||
pixel_pointer_[pixel_start*14 + 0] =
|
||||
pixel_pointer_[pixel_start*14 + 1] =
|
||||
pixel_pointer_[pixel_start*14 + 2] =
|
||||
pixel_pointer_[pixel_start*14 + 3] =
|
||||
pixel_pointer_[pixel_start*14 + 4] =
|
||||
pixel_pointer_[pixel_start*14 + 5] =
|
||||
pixel_pointer_[pixel_start*14 + 6] = 0;
|
||||
}
|
||||
was_double_ = is_double;
|
||||
|
||||
switch(line_mode) {
|
||||
case GraphicsMode::Text:
|
||||
output_text(
|
||||
&pixel_pointer_[pixel_start * 14 + 7],
|
||||
&base_stream_[static_cast<size_t>(pixel_start)],
|
||||
static_cast<size_t>(pixel_end - pixel_start),
|
||||
static_cast<size_t>(pixel_row));
|
||||
break;
|
||||
|
||||
case GraphicsMode::DoubleText:
|
||||
output_double_text(
|
||||
&pixel_pointer_[pixel_start * 14],
|
||||
&base_stream_[static_cast<size_t>(pixel_start)],
|
||||
&auxiliary_stream_[static_cast<size_t>(pixel_start)],
|
||||
static_cast<size_t>(pixel_end - pixel_start),
|
||||
static_cast<size_t>(pixel_row));
|
||||
break;
|
||||
|
||||
case GraphicsMode::LowRes:
|
||||
output_low_resolution(
|
||||
&pixel_pointer_[pixel_start * 14 + 7],
|
||||
&base_stream_[static_cast<size_t>(pixel_start)],
|
||||
static_cast<size_t>(pixel_end - pixel_start),
|
||||
pixel_start,
|
||||
pixel_row);
|
||||
break;
|
||||
|
||||
case GraphicsMode::DoubleLowRes:
|
||||
output_double_low_resolution(
|
||||
&pixel_pointer_[pixel_start * 14],
|
||||
&base_stream_[static_cast<size_t>(pixel_start)],
|
||||
&auxiliary_stream_[static_cast<size_t>(pixel_start)],
|
||||
static_cast<size_t>(pixel_end - pixel_start),
|
||||
pixel_start,
|
||||
pixel_row);
|
||||
break;
|
||||
|
||||
case GraphicsMode::HighRes:
|
||||
output_high_resolution(
|
||||
&pixel_pointer_[pixel_start * 14 + 7],
|
||||
&base_stream_[static_cast<size_t>(pixel_start)],
|
||||
static_cast<size_t>(pixel_end - pixel_start));
|
||||
break;
|
||||
|
||||
case GraphicsMode::DoubleHighRes:
|
||||
output_double_high_resolution(
|
||||
&pixel_pointer_[pixel_start * 14],
|
||||
&base_stream_[static_cast<size_t>(pixel_start)],
|
||||
&auxiliary_stream_[static_cast<size_t>(pixel_start)],
|
||||
static_cast<size_t>(pixel_end - pixel_start));
|
||||
break;
|
||||
|
||||
default: break;
|
||||
}
|
||||
|
||||
if(pixel_end == 40) {
|
||||
if(was_double_) {
|
||||
pixel_pointer_[563] =
|
||||
pixel_pointer_[564] =
|
||||
pixel_pointer_[565] =
|
||||
pixel_pointer_[566] =
|
||||
pixel_pointer_[567] = 0;
|
||||
} else {
|
||||
if(line_mode == GraphicsMode::HighRes && base_stream_[39]&0x80)
|
||||
pixel_pointer_[567] = graphics_carry_;
|
||||
else
|
||||
pixel_pointer_[567] = 0;
|
||||
}
|
||||
|
||||
crt_->output_data(568, 568);
|
||||
pixel_pointer_ = nullptr;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if(column_ < 40 && ending_column >= 40) {
|
||||
crt_->output_blank(568);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
The left border, sync, right border pattern doesn't depend on whether
|
||||
there were pixels this row and is output as soon as it is known.
|
||||
*/
|
||||
|
||||
if(column_ < first_sync_column && ending_column >= first_sync_column) {
|
||||
crt_->output_blank((first_sync_column - 41)*14 - 1);
|
||||
}
|
||||
|
||||
if(column_ < (first_sync_column + sync_length) && ending_column >= (first_sync_column + sync_length)) {
|
||||
crt_->output_sync(sync_length*14);
|
||||
}
|
||||
|
||||
int second_blank_start;
|
||||
if(!is_text_mode(graphics_mode(row_+1))) {
|
||||
const int colour_burst_start = std::max(first_sync_column + sync_length + 1, column_);
|
||||
const int colour_burst_end = std::min(first_sync_column + sync_length + 4, ending_column);
|
||||
if(colour_burst_end > colour_burst_start) {
|
||||
crt_->output_colour_burst(static_cast<unsigned int>(colour_burst_end - colour_burst_start) * 14, 192);
|
||||
}
|
||||
|
||||
second_blank_start = std::max(first_sync_column + sync_length + 3, column_);
|
||||
} else {
|
||||
second_blank_start = std::max(first_sync_column + sync_length, column_);
|
||||
}
|
||||
|
||||
if(ending_column > second_blank_start) {
|
||||
crt_->output_blank(static_cast<unsigned int>(ending_column - second_blank_start) * 14);
|
||||
}
|
||||
}
|
||||
|
||||
int_cycles -= cycles_this_line;
|
||||
column_ = (column_ + cycles_this_line) % 65;
|
||||
if(!column_) {
|
||||
row_ = (row_ + 1) % 262;
|
||||
flash_ = (flash_ + 1) % (2 * flash_length);
|
||||
|
||||
// Add an extra half a colour cycle of blank; this isn't counted in the run_for
|
||||
// count explicitly but is promised.
|
||||
crt_->output_blank(2);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
GraphicsMode graphics_mode(int row) {
|
||||
if(text_) return columns_80_ ? GraphicsMode::DoubleText : GraphicsMode::Text;
|
||||
if(mixed_ && row >= 160 && row < 192) {
|
||||
@ -582,13 +550,7 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
|
||||
static_cast<uint16_t>(((video_page()+1) * 0x400) + row_address);
|
||||
}
|
||||
|
||||
static const int flash_length = 8406;
|
||||
BusHandler &bus_handler_;
|
||||
void output_data_to_column(int column) {
|
||||
int length = column - pixel_pointer_column_;
|
||||
crt_->output_data(static_cast<unsigned int>(length*14), static_cast<unsigned int>(length * (pixels_are_high_density_ ? 14 : 7)));
|
||||
pixel_pointer_ = nullptr;
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
@ -1007,6 +1007,7 @@
|
||||
4B894516201967B4007DE474 /* StaticAnalyser.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StaticAnalyser.cpp; sourceTree = "<group>"; };
|
||||
4B894517201967B4007DE474 /* StaticAnalyser.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StaticAnalyser.cpp; sourceTree = "<group>"; };
|
||||
4B894540201967D6007DE474 /* Machines.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Machines.hpp; sourceTree = "<group>"; };
|
||||
4B8A7E85212F988200F2BBC6 /* ClockDeferrer.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = ClockDeferrer.hpp; sourceTree = "<group>"; };
|
||||
4B8D287E1F77207100645199 /* TrackSerialiser.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = TrackSerialiser.hpp; sourceTree = "<group>"; };
|
||||
4B8E4ECD1DCE483D003716C3 /* KeyboardMachine.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = KeyboardMachine.hpp; sourceTree = "<group>"; };
|
||||
4B8EF6071FE5AF830076CCDD /* LowpassSpeaker.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = LowpassSpeaker.hpp; sourceTree = "<group>"; };
|
||||
@ -3149,6 +3150,7 @@
|
||||
4BB06B211F316A3F00600C7A /* ForceInline.hpp */,
|
||||
4BB146C61F49D7D700253439 /* ClockingHintSource.hpp */,
|
||||
4B449C942063389900A095C8 /* TimeTypes.hpp */,
|
||||
4B8A7E85212F988200F2BBC6 /* ClockDeferrer.hpp */,
|
||||
);
|
||||
name = ClockReceiver;
|
||||
path = ../../ClockReceiver;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user