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D88: Add 2D (40 track double density) support.

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This assumes a 360rpm drive, and double stepping.

If fluxengine supports the concept of 40 vs 80 track drives in the
future, it might make sense for this to assume a 300rpm drive
instead.
This commit is contained in:
Thomas Daede
2022-01-28 10:50:36 -08:00
parent 86f6a2f722
commit dfb461b05c
1 changed files with 15 additions and 8 deletions
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23
lib/imagereader/d88imagereader.cc
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@@ -58,10 +58,11 @@ public:
ByteReader trackTableReader(trackTable);
if (config.encoder().format_case() != EncoderProto::FormatCase::FORMAT_NOT_SET)
std::cout << "D88: overriding configured format";
std::cout << "D88: overriding configured format\n";
auto ibm = config.mutable_encoder()->mutable_ibm();
config.mutable_cylinders()->set_end(0);
int physicalStep = 1;
int clockRate = 500;
if (mediaFlag == 0x20) {
std::cout << "D88: high density mode\n";
if (config.flux_sink().dest_case() == FluxSinkProto::DestCase::kDrive) {
@@ -69,6 +70,8 @@ public:
}
} else {
std::cout << "D88: single/double density mode\n";
physicalStep = 2;
clockRate = 300;
if (config.flux_sink().dest_case() == FluxSinkProto::DestCase::kDrive) {
config.mutable_flux_sink()->mutable_drive()->set_high_density(false);
}
@@ -87,7 +90,7 @@ public:
int trackMfm = -1;
auto trackdata = ibm->add_trackdata();
trackdata->set_clock_rate_khz(500);
trackdata->set_clock_rate_khz(clockRate);
trackdata->set_track_length_ms(167);
auto sectors = trackdata->mutable_sectors();
@@ -124,7 +127,7 @@ public:
if (trackSectorSize < 0) {
trackSectorSize = sectorSize;
// this is the first sector we've read, use it settings for per-track data
trackdata->set_cylinder(cylinder);
trackdata->set_cylinder(cylinder * physicalStep);
trackdata->set_head(head);
trackdata->set_sector_size(sectorSize);
trackdata->set_use_fm(fm);
@@ -147,17 +150,21 @@ public:
}
Bytes data(sectorSize);
inputFile.read((char*) data.begin(), data.size());
const auto& sector = image->put(cylinder, head, sectorId);
const auto& sector = image->put(cylinder * physicalStep, head, sectorId);
sector->status = Sector::OK;
sector->logicalTrack = cylinder;
sector->physicalCylinder = cylinder;
sector->physicalCylinder = cylinder * physicalStep;
sector->logicalSide = sector->physicalHead = head;
sector->logicalSector = sectorId;
sector->data = data;
sectors->add_sector(sectorId);
if (config.cylinders().end() < cylinder)
config.mutable_cylinders()->set_end(cylinder);
}
if (physicalStep == 2) {
auto trackdata = ibm->add_trackdata();
trackdata->set_clock_rate_khz(clockRate);
trackdata->set_track_length_ms(167);
}
}