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RASCSI
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Mode page value improvements (#734) 

* Updated mode page values

* Page size update

* Caching parameters are not changeable
This commit is contained in:
Uwe Seimet 2022-03-14 01:47:54 +01:00 committed by GitHub
parent 32fb022a41
commit cb3011de99
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 51 additions and 23 deletions
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74
src/raspberrypi/devices/disk.cpp
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@ -610,15 +610,8 @@ void Disk::AddFormatPage(map<int, vector<BYTE>>& pages, bool changeable) const
{
vector<BYTE> buf(24);
// Page can be saved
buf[0] = 0x80;
// Show the number of bytes in the physical sector as changeable
// (though it cannot be changed in practice)
// No changeable area
if (changeable) {
buf[0xc] = 0xff;
buf[0xd] = 0xff;
pages[3] = buf;
return;
@ -626,22 +619,34 @@ void Disk::AddFormatPage(map<int, vector<BYTE>>& pages, bool changeable) const
if (IsReady()) {
// Set the number of tracks in one zone to 8 (TODO)
buf[0x3] = 0x08;
buf[0x03] = 0x08;
// Set sector/track to 25 (TODO)
buf[0xa] = 0x00;
buf[0xb] = 0x19;
buf[0x0a] = 0x00;
buf[0x0b] = 0x19;
// Set the number of bytes in the physical sector
int size = 1 << disk.size;
buf[0xc] = (BYTE)(size >> 8);
buf[0xd] = (BYTE)size;
buf[0x0c] = (BYTE)(size >> 8);
buf[0x0d] = (BYTE)size;
// Interleave 1
buf[0x0e] = 0x00;
buf[0x0f] = 0x01;
// Track skew factor 11
buf[0x10] = 0x00;
buf[0x11] = 0x0b;
// Cylinder skew factor 20
buf[0x12] = 0x00;
buf[0x13] = 0x14;
}
// Set removable attribute
if (IsRemovable()) {
buf[20] = 0x20;
}
buf[20] = IsRemovable() ? 0x20 : 0x00;
// Hard-sectored
buf[20] |= 0x40;
pages[3] = buf;
}
@ -663,22 +668,45 @@ void Disk::AddDrivePage(map<int, vector<BYTE>>& pages, bool changeable) const
uint32_t cylinder = disk.blocks;
cylinder >>= 3;
cylinder /= 25;
buf[0x2] = (BYTE)(cylinder >> 16);
buf[0x3] = (BYTE)(cylinder >> 8);
buf[0x4] = (BYTE)cylinder;
buf[0x02] = (BYTE)(cylinder >> 16);
buf[0x03] = (BYTE)(cylinder >> 8);
buf[0x04] = (BYTE)cylinder;
// Fix the head at 8
buf[0x5] = 0x8;
buf[0x05] = 0x8;
// Medium rotation rate 7200
buf[0x14] = 0x1c;
buf[0x15] = 0x20;
}
pages[4] = buf;
}
void Disk::AddCachePage(map<int, vector<BYTE>>& pages, bool) const
void Disk::AddCachePage(map<int, vector<BYTE>>& pages, bool changeable) const
{
vector<BYTE> buf(12);
// Only read cache is valid, no prefetch
// No changeable area
if (changeable) {
pages[8] = buf;
return;
}
// Only read cache is valid
// Disable pre-fetch transfer length
buf[0x04] = 0xff;
buf[0x05] = 0xff;
// Maximum pre-fetch
buf[0x08] = 0xff;
buf[0x09] = 0xff;
// Maximum pre-fetch ceiling
buf[0x0a] = 0xff;
buf[0x0b] = 0xff;
pages[8] = buf;
}