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Permit generator-based event-table generation.

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This commit is contained in:
Thomas Harte 2023-02-12 21:58:50 -05:00
parent 41d57e03a6
commit 8665dca7f0
1 changed files with 78 additions and 36 deletions
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114
Components/9918/Implementation/Storage.hpp
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@ -1,4 +1,5 @@
//
//
// Storage.hpp
// Clock Signal
//
@ -12,6 +13,8 @@
#include "LineBuffer.hpp"
#include "YamahaCommands.hpp"
#include <optional>
namespace TI {
namespace TMS {
@ -53,7 +56,8 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
External,
DataBlock,
SpriteY,
SpriteContents,
SpriteLocation,
SpritePattern,
} type = Type::External;
constexpr Event(int offset, Type type) noexcept :
@ -80,7 +84,7 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
sprite_block_ = 0;
if(is_refresh) {
next_event_ = refresh_events;
next_event_ = refresh_events.data();
return;
}
@ -143,7 +147,7 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
Storage() noexcept {
// Perform sanity checks on the event lists.
#ifndef NDEBUG
const Event *lists[] = { no_sprites_events, refresh_events, nullptr };
const Event *lists[] = { no_sprites_events, refresh_events.data(), nullptr };
const Event **list = lists;
while(*list) {
const Event *cursor = *list;
@ -162,52 +166,90 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
// in a randomised position, which means that start-of-line isn't announced.
//
// Do I really want that behaviour?
next_event_ = refresh_events;
next_event_ = refresh_events.data();
}
private:
// This emulator treats position 0 as being immediately after the standard pixel area.
// i.e. offset 1282 on Grauw's http://map.grauw.nl/articles/vdp-vram-timing/vdp-timing.png
static constexpr int ZeroAsGrauwIndex = 1282;
constexpr static int grauw_to_internal(int offset) {
return (offset + 1368 - 1282) % 1368;
return (offset + 1368 - ZeroAsGrauwIndex) % 1368;
}
constexpr static int internal_to_grauw(int offset) {
return (offset + ZeroAsGrauwIndex) % 1368;
}
static constexpr Event refresh_events[] = {
Event(1284), Event(1292), Event(1300), Event(1308), Event(1316), Event(1324),
Event(1334), Event(1344), Event(1352), Event(1360), Event(0), Event(8),
Event(16), Event(24), Event(32), Event(40), Event(48), Event(56),
Event(64), Event(72), Event(80), Event(88), Event(96), Event(104),
Event(112), Event(120),
template <typename GeneratorT> static constexpr size_t events_size() {
size_t size = 0;
for(int c = 0; c < 1368; c++) {
const auto event_type = GeneratorT::event(internal_to_grauw(c));
size += event_type.has_value();
}
return size + 1;
}
Event(164), Event(172), Event(180), Event(188), Event(196), Event(204),
Event(212), Event(220), Event(228), Event(236), Event(244), Event(252),
Event(260), Event(268), Event(276), /* Refresh. */ Event(292), Event(300),
Event(308), Event(316), Event(324), Event(332), Event(340), Event(348),
Event(356), Event(364), Event(372), Event(380), Event(388), Event(396),
Event(404), /* Refresh. */ Event(420), Event(428), Event(436), Event(444),
Event(452), Event(460), Event(468), Event(476), Event(484), Event(492),
Event(500), Event(508), Event(516), Event(524), Event(532), /* Refresh. */
Event(548), Event(556), Event(564), Event(570), Event(580), Event(588),
Event(596), Event(604), Event(612), Event(620), Event(628), Event(636),
Event(644), Event(652), Event(660), /* Refresh. */ Event(676), Event(684),
Event(692), Event(700), Event(708), Event(716), Event(724), Event(732),
Event(740), Event(748), Event(756), Event(764), Event(772), Event(780),
Event(788), /* Refresh. */ Event(804), Event(812), Event(820), Event(828),
Event(836), Event(844), Event(852), Event(860), Event(868), Event(876),
Event(884), Event(892), Event(900), Event(908), Event(916), /* Refresh. */
Event(932), Event(940), Event(948), Event(956), Event(964), Event(972),
Event(980), Event(988), Event(996), Event(1004), Event(1012), Event(1020),
Event(1028), Event(1036), Event(1044), /* Refresh. */ Event(1060), Event(1068),
Event(1076), Event(1084), Event(1092), Event(1100), Event(1108), Event(1116),
Event(1124), Event(1132), Event(1140), Event(1148), Event(1156), Event(1164),
Event(1172), /* Refresh. */ Event(1188), Event(1196), Event(1204), Event(1212),
Event(1220), Event(1228),
template <typename GeneratorT, size_t size = events_size<GeneratorT>()>
static constexpr std::array<Event, size> events() {
std::array<Event, size> result{};
size_t index = 0;
for(int c = 0; c < 1368; c++) {
const auto event_type = GeneratorT::event(internal_to_grauw(c));
if(!event_type) {
continue;
}
// TODO: once all lists are using generators, remove implicit grauw_to_internal
// from Event constructor and just supply c here.
result[index] = Event(internal_to_grauw(c), *event_type);
++index;
}
result[index] = Event();
return result;
}
Event(1268), Event(1276),
struct RefreshGenerator {
static constexpr std::optional<typename Event::Type> event(int grauw_index) {
// From 0 to 126: CPU/CMD slots at every cycle divisible by 8.
if(grauw_index < 126) {
if(grauw_index & 7) return std::nullopt;
return Event::Type::External;
}
Event()
// From 164 to 1234: eight-cycle windows, the first 15 of each 16 being
// CPU/CMD and the final being refresh.
if(grauw_index >= 164 && grauw_index < 1234) {
const int offset = grauw_index - 164;
if(offset & 7) return std::nullopt;
if(((offset >> 3) & 15) == 15) return std::nullopt;
return Event::Type::External;
}
// From 1268 to 1330: CPU/CMD slots at every cycle divisible by 8.
if(grauw_index >= 1268 && grauw_index < 1330) {
const int offset = grauw_index - 1268;
if(offset & 7) return std::nullopt;
return Event::Type::External;
}
// A CPU/CMD at 1334.
if(grauw_index == 1334) {
return Event::Type::External;
}
// From 1344 to 1366: CPU/CMD slots every cycle divisible by 8.
if(grauw_index >= 1344 && grauw_index < 1366) {
const int offset = grauw_index - 1344;
if(offset & 7) return std::nullopt;
return Event::Type::External;
}
// Otherwise: nothing.
return std::nullopt;
}
};
static constexpr auto refresh_events = events<RefreshGenerator>();
static constexpr Event no_sprites_events[] = {
Event(1282), Event(1290), Event(1298), Event(1306),
Event(1314), Event(1322), Event(1332), Event(1342),