6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-02-16 18:30:32 +00:00
Code Issues Projects Releases Wiki Activity

Merge pull request #244 from TomHarte/FasterStartup

Browse Source 
Improves CPC analysis times
This commit is contained in:
Thomas Harte 2017-09-16 22:07:43 -04:00 committed by GitHub
commit 704bfa114c
2 changed files with 31 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
StaticAnalyser/AmstradCPC/StaticAnalyser.cpp
View File

@ -56,12 +56,17 @@ static std::string RunCommandFor(const Storage::Disk::CPM::File &file) {
static void InspectCatalogue(
const Storage::Disk::CPM::Catalogue &catalogue,
StaticAnalyser::Target &target) {
std::vector<Storage::Disk::CPM::File> candidate_files = catalogue.files;
std::vector<const Storage::Disk::CPM::File *> candidate_files;
candidate_files.reserve(catalogue.files.size());
for(auto &file : catalogue.files) {
candidate_files.push_back(&file);
}
// Remove all files with untypable characters.
candidate_files.erase(
std::remove_if(candidate_files.begin(), candidate_files.end(), [](const Storage::Disk::CPM::File &file) {
for(auto c : file.name + file.type) {
std::remove_if(candidate_files.begin(), candidate_files.end(), [](const Storage::Disk::CPM::File *file) {
for(auto c : file->name + file->type) {
if(c < 32) return true;
}
return false;
@ -70,8 +75,8 @@ static void InspectCatalogue(
// If that leaves a mix of 'system' (i.e. hidden) and non-system files, remove the system files.
bool are_all_system = true;
for(auto &file : candidate_files) {
if(!file.system) {
for(auto file : candidate_files) {
if(!file->system) {
are_all_system = false;
break;
}
@ -79,15 +84,15 @@ static void InspectCatalogue(
if(!are_all_system) {
candidate_files.erase(
std::remove_if(candidate_files.begin(), candidate_files.end(), [](const Storage::Disk::CPM::File &file) {
return file.system;
std::remove_if(candidate_files.begin(), candidate_files.end(), [](const Storage::Disk::CPM::File *file) {
return file->system;
}),
candidate_files.end());
}
// If there's just one file, run that.
if(candidate_files.size() == 1) {
target.loadingCommand = RunCommandFor(candidate_files[0]);
target.loadingCommand = RunCommandFor(*candidate_files[0]);
return;
}
@ -101,24 +106,24 @@ static void InspectCatalogue(
for(size_t c = 0; c < candidate_files.size(); c++) {
// Files with nothing but spaces in their name can't be loaded by the user, so disregard them.
if(candidate_files[c].type == " " && candidate_files[c].name == " ")
if(candidate_files[c]->type == " " && candidate_files[c]->name == " ")
continue;
// Check for whether this is [potentially] BASIC.
if(candidate_files[c].data.size() >= 128 && !((candidate_files[c].data[18] >> 1) & 7)) {
if(candidate_files[c]->data.size() >= 128 && !((candidate_files[c]->data[18] >> 1) & 7)) {
basic_files++;
last_basic_file = c;
}
// Check suffix for emptiness.
if(is_implied_extension(candidate_files[c].type)) {
if(is_implied_extension(candidate_files[c]->type)) {
implicit_suffixed_files++;
last_implicit_suffixed_file = c;
}
}
if(basic_files == 1 || implicit_suffixed_files == 1) {
size_t selected_file = (basic_files == 1) ? last_basic_file : last_implicit_suffixed_file;
target.loadingCommand = RunCommandFor(candidate_files[selected_file]);
target.loadingCommand = RunCommandFor(*candidate_files[selected_file]);
return;
}
@ -127,15 +132,15 @@ static void InspectCatalogue(
std::map<std::string, int> name_counts;
std::map<std::string, size_t> indices_by_name;
size_t index = 0;
for(auto &file : candidate_files) {
name_counts[file.name]++;
indices_by_name[file.name] = index;
for(auto file : candidate_files) {
name_counts[file->name]++;
indices_by_name[file->name] = index;
index++;
}
if(name_counts.size() == 2) {
for(auto &pair : name_counts) {
if(pair.second == 1) {
target.loadingCommand = RunCommandFor(candidate_files[indices_by_name[pair.first]]);
target.loadingCommand = RunCommandFor(*candidate_files[indices_by_name[pair.first]]);
return;
}
}

12
Storage/Disk/Encodings/MFM.cpp
View File

@ -221,7 +221,7 @@ std::shared_ptr<Storage::Disk::Track> Storage::Encodings::MFM::GetMFMTrackWithSe
22, 0x4e,
12,
(sector_gap_length != DefaultSectorGapLength) ? sector_gap_length : 54, 0xff,
12500); // unintelligently: double the single-density bytes/rotation (or: 500kps @ 300 rpm)
12500); // unintelligently: double the single-density bytes/rotation (or: 500kbps @ 300 rpm)
}
std::unique_ptr<Encoder> Storage::Encodings::MFM::GetMFMEncoder(std::vector<uint8_t> &target) {
@ -337,7 +337,15 @@ uint8_t Parser::get_byte_for_shift_value(uint16_t value) {
uint8_t Parser::get_next_byte() {
bit_count_ = 0;
while(bit_count_ < 16) run_for(Cycles(1));
// Archetypal MFM is 500,000 bps given that the drive has an RPM of 300. Clock rate was
// specified at 4,000,000. So that's an idealised 8 cycles per bit, Jump ahead 14
// times that...
run_for(Cycles(14 * 8));
// ... and proceed at half-idealised-bit intervals to get the next bit. Then proceed very gingerly indeed.
while(bit_count_ < 15) run_for(Cycles(4));
while(bit_count_ < 16) run_for(Cycles(2));
uint8_t byte = get_byte_for_shift_value((uint16_t)shift_register_);
crc_generator_.add(byte);
return byte;