From c6dd7d4726dd1a72764de157fbd27cf0ba8af1a7 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Sun, 22 Jan 2023 20:19:21 -0500
Subject: [PATCH] Transcribe no-sprite event list.
---
Components/9918/Implementation/Fetch.hpp | 111 +++++++++++++++++++++++
1 file changed, 111 insertions(+)
diff --git a/Components/9918/Implementation/Fetch.hpp b/Components/9918/Implementation/Fetch.hpp
index f8efc0034..62f3762ae 100644
--- a/Components/9918/Implementation/Fetch.hpp
+++ b/Components/9918/Implementation/Fetch.hpp
@@ -472,6 +472,16 @@ template<bool use_end> void Base<personality>::fetch_sms(int start, int end) {
// TODO.
+namespace {
+
+// 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
+constexpr int grauw_to_internal(int offset) {
+ return (offset + 1368 - 1282) % 1368;
+}
+
+}
+
template <Personality personality>
template<bool use_end> void Base<personality>::fetch_yamaha_refresh(int start, int end) {
(void)start;
@@ -499,6 +509,107 @@ template<bool use_end, bool fetch_sprites> void Base<personality>::fetch_yamaha(
can occur.
*/
+ // 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
+ //
+ // That being the case...
+ //
+ // Data blocks are located at:
+ //
+ // 194
+
+ /// Describes an _observable_ memory access event. i.e. anything that it is safe
+ /// (and convenient) to treat as atomic in between external slots.
+ struct Event {
+ /// Offset of the _beginning_ of the event. Not completely arbitrarily: this is when
+ /// external data must be ready by in order to take part in those slots.
+ int offset;
+ enum class Type {
+ External,
+ DataBlock,
+ } type;
+
+ constexpr Event(int offset, Type type) noexcept :
+ offset(grauw_to_internal(offset)),
+ type(type) {}
+ };
+ constexpr Event no_sprites_events[] = {
+ Event(1282, Event::Type::External),
+ Event(1290, Event::Type::External),
+ Event(1298, Event::Type::External),
+ Event(1306, Event::Type::External),
+ Event(1314, Event::Type::External),
+ Event(1322, Event::Type::External),
+ Event(1332, Event::Type::External),
+ Event(1342, Event::Type::External),
+ Event(1350, Event::Type::External),
+ Event(1358, Event::Type::External),
+ Event(1366, Event::Type::External),
+
+ Event(6, Event::Type::External),
+ Event(14, Event::Type::External),
+ Event(22, Event::Type::External),
+ Event(30, Event::Type::External),
+ Event(38, Event::Type::External),
+ Event(46, Event::Type::External),
+ Event(54, Event::Type::External),
+ Event(62, Event::Type::External),
+ Event(70, Event::Type::External),
+ Event(78, Event::Type::External),
+ Event(86, Event::Type::External),
+ Event(94, Event::Type::External),
+ Event(102, Event::Type::External),
+ Event(110, Event::Type::External),
+ Event(118, Event::Type::External),
+
+ Event(162, Event::Type::External),
+ Event(170, Event::Type::External),
+ Event(182, Event::Type::External),
+ Event(188, Event::Type::External),
+ // Omitted: dummy data block. Is not observable.
+ Event(214, Event::Type::External),
+ Event(220, Event::Type::External),
+
+ Event(226, Event::Type::DataBlock), Event(246, Event::Type::External), Event(252, Event::Type::External),
+ Event(258, Event::Type::DataBlock), Event(278, Event::Type::External), // Omitted: refresh.
+ Event(290, Event::Type::DataBlock), Event(310, Event::Type::External), Event(316, Event::Type::External),
+ Event(322, Event::Type::DataBlock), Event(342, Event::Type::External), Event(348, Event::Type::External),
+ Event(354, Event::Type::DataBlock), Event(374, Event::Type::External), Event(380, Event::Type::External),
+ Event(386, Event::Type::DataBlock), Event(406, Event::Type::External), // Omitted: refresh.
+ Event(418, Event::Type::DataBlock), Event(438, Event::Type::External), Event(444, Event::Type::External),
+ Event(450, Event::Type::DataBlock), Event(470, Event::Type::External), Event(476, Event::Type::External),
+
+ Event(482, Event::Type::DataBlock), Event(502, Event::Type::External), Event(508, Event::Type::External),
+ Event(514, Event::Type::DataBlock), Event(534, Event::Type::External), // Omitted: refresh.
+ Event(546, Event::Type::DataBlock), Event(566, Event::Type::External), Event(572, Event::Type::External),
+ Event(578, Event::Type::DataBlock), Event(598, Event::Type::External), Event(604, Event::Type::External),
+ Event(610, Event::Type::DataBlock), Event(630, Event::Type::External), Event(636, Event::Type::External),
+ Event(642, Event::Type::DataBlock), Event(662, Event::Type::External), // Omitted: refresh.
+ Event(674, Event::Type::DataBlock), Event(694, Event::Type::External), Event(700, Event::Type::External),
+ Event(706, Event::Type::DataBlock), Event(726, Event::Type::External), Event(732, Event::Type::External),
+
+ Event(738, Event::Type::DataBlock), Event(758, Event::Type::External), Event(764, Event::Type::External),
+ Event(770, Event::Type::DataBlock), Event(790, Event::Type::External), // Omitted: refresh.
+ Event(802, Event::Type::DataBlock), Event(822, Event::Type::External), Event(828, Event::Type::External),
+ Event(834, Event::Type::DataBlock), Event(854, Event::Type::External), Event(860, Event::Type::External),
+ Event(866, Event::Type::DataBlock), Event(886, Event::Type::External), Event(892, Event::Type::External),
+ Event(898, Event::Type::DataBlock), Event(918, Event::Type::External), // Omitted: refresh.
+ Event(930, Event::Type::DataBlock), Event(950, Event::Type::External), Event(956, Event::Type::External),
+ Event(962, Event::Type::DataBlock), Event(982, Event::Type::External), Event(988, Event::Type::External),
+
+ Event(994, Event::Type::DataBlock), Event(1014, Event::Type::External), Event(1020, Event::Type::External),
+ Event(1026, Event::Type::DataBlock), Event(1046, Event::Type::External), // Omitted: refresh.
+ Event(1058, Event::Type::DataBlock), Event(1078, Event::Type::External), Event(1084, Event::Type::External),
+ Event(1090, Event::Type::DataBlock), Event(1110, Event::Type::External), Event(1116, Event::Type::External),
+ Event(1122, Event::Type::DataBlock), Event(1142, Event::Type::External), Event(1148, Event::Type::External),
+ Event(1154, Event::Type::DataBlock), Event(1174, Event::Type::External), // Omitted: refresh.
+ Event(1186, Event::Type::DataBlock), Event(1206, Event::Type::External), Event(1212, Event::Type::External),
+ Event(1218, Event::Type::DataBlock),
+
+ Event(1266, Event::Type::External),
+ Event(1274, Event::Type::External),
+ };
+
(void)start;
(void)end;
}