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Route into the Yamaha fetcher.

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Albeit that it doesn't yet fetch.
This commit is contained in:
Thomas Harte 2023-01-21 22:47:16 -05:00
parent 696ec12516
commit a5765abbad
3 changed files with 41 additions and 20 deletions
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46
Components/9918/Implementation/9918.cpp
View File

@ -200,25 +200,51 @@ void TMS9918<personality>::run_for(const HalfCycles cycles) {
// ------------------------
// Perform memory accesses.
// ------------------------
#define fetch(function, clock) \
#define fetch(function_true, function_false, clock) { \
const int first_window = from_internal<personality, clock>(this->fetch_pointer_.column);\
const int final_window = from_internal<personality, clock>(end_column); \
if(first_window == final_window) break; \
if(final_window != clock_rate<personality, clock>()) { \
function<true>(first_window, final_window); \
function_true(first_window, final_window); \
} else { \
function<false>(first_window, final_window); \
}
function_false(first_window, final_window); \
} \
}
#define fetch_simple(function, clock) fetch(function<true>, function<false>, clock)
switch(line_buffer.line_mode) {
case LineMode::Text: { fetch(this->template fetch_tms_text, Clock::TMSMemoryWindow); } break;
case LineMode::Character: { fetch(this->template fetch_tms_character, Clock::TMSMemoryWindow); } break;
case LineMode::SMS: { fetch(this->template fetch_sms, Clock::TMSMemoryWindow); } break;
case LineMode::Refresh: { fetch(this->template fetch_tms_refresh, Clock::TMSMemoryWindow); } break;
case LineMode::Text: fetch_simple(this->template fetch_tms_text, Clock::TMSMemoryWindow); break;
case LineMode::Character: fetch_simple(this->template fetch_tms_character, Clock::TMSMemoryWindow); break;
case LineMode::SMS: fetch_simple(this->template fetch_sms, Clock::TMSMemoryWindow); break;
case LineMode::Refresh: fetch_simple(this->template fetch_tms_refresh, Clock::TMSMemoryWindow); break;
case LineMode::Yamaha:
#define true_func this->template fetch_yamaha<true, true>
#define false_func this->template fetch_yamaha<false, true>
fetch(
true_func,
false_func,
Clock::Internal);
#undef true_func
#undef false_func
break;
#define true_func this->template fetch_yamaha<true, false>
#define false_func this->template fetch_yamaha<false, false>
case LineMode::YamahaNoSprites:
fetch(
true_func,
false_func,
Clock::Internal);
#undef true_func
#undef false_func
break;
}
#undef fetch_simple
#undef fetch
// TODO: the above is too macro-heavy. Simplify.
// -------------------------------
@ -290,8 +316,8 @@ void TMS9918<personality>::run_for(const HalfCycles cycles) {
case ScreenMode::YamahaGraphics5:
case ScreenMode::YamahaGraphics6:
case ScreenMode::YamahaGraphics7:
// TODO: actual line modes.
next_line_buffer.line_mode = LineMode::Refresh;
// TODO: sprites?
next_line_buffer.line_mode = LineMode::YamahaNoSprites;
break;
default:
// This covers both MultiColour and Graphics modes.

7
Components/9918/Implementation/9918Base.hpp
View File

@ -57,7 +57,9 @@ enum class LineMode {
Text,
Character,
Refresh,
SMS
SMS,
Yamaha,
YamahaNoSprites,
};
enum class MemoryAccess {
@ -459,8 +461,7 @@ template <Personality personality> struct Base: public Storage<personality> {
template<bool use_end> void fetch_tms_character(int start, int end);
template<bool use_end> void fetch_yamaha_refresh(int start, int end);
template<bool use_end> void fetch_yamaha_no_sprites(int start, int end);
template<bool use_end> void fetch_yamaha_sprites(int start, int end);
template<bool use_end, bool fetch_sprites> void fetch_yamaha(int start, int end);
template<bool use_end> void fetch_sms(int start, int end);

8
Components/9918/Implementation/Fetch.hpp
View File

@ -479,13 +479,7 @@ template<bool use_end> void Base<personality>::fetch_yamaha_refresh(int start, i
}
template <Personality personality>
template<bool use_end> void Base<personality>::fetch_yamaha_no_sprites(int start, int end) {
(void)start;
(void)end;
}
template <Personality personality>
template<bool use_end> void Base<personality>::fetch_yamaha_sprites(int start, int end) {
template<bool use_end, bool fetch_sprites> void Base<personality>::fetch_yamaha(int start, int end) {
(void)start;
(void)end;
}