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MegaSTE mode added for using IDs as LUNs

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Troy 2022-11-13 18:08:41 -05:00
parent 5bb2dee71f
commit dba1860856
1 changed files with 36 additions and 1 deletions
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37
src/BlueSCSI.cpp
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@ -77,6 +77,10 @@ byte m_msb[256]; // Command storage bytes
SCSI_DEVICE scsi_device_list[NUM_SCSIID][NUM_SCSILUN]; // Maximum number
SCSI_INQUIRY_DATA default_hdd, default_optical;
// Enables SCSI IDs to be representing as LUNs on SCSI ID 0
// This supports a specific case for the Atari MegaSTE internal SCSI adapter
bool megaste_mode = false;
// function table
byte (*scsi_command_table[MAX_SCSI_COMMAND])(SCSI_DEVICE *dev, const byte *cdb);
@ -318,6 +322,15 @@ void setup()
scsi_command_table[i] = onUnimplemented;
}
// zero all SCSI device structs
for(unsigned id = 0; id < NUM_SCSIID; id++)
{
for(unsigned lun = 0; lun < NUM_SCSILUN; lun++)
{
memset(&scsi_device_list[id][lun], 0, sizeof(SCSI_DEVICE));
}
}
// SCSI commands that just need to return ok
scsi_command_table[SCSI_FORMAT_UNIT4] = onNOP;
scsi_command_table[SCSI_FORMAT_UNIT6] = onNOP;
@ -538,6 +551,14 @@ void findDriveImages(FsFile root) {
file_test.close();
break;
}
// Look for this file to enable MSTE_MODE
// hacky until a better ini file parsing exists
if(strncmp(name, "MSTE_MODE", 9) == 0) {
megaste_mode = true;
continue;
}
// Valid file, open for reading/writing.
file = new FsFile(SD.open(name, O_RDWR));
if(file && file->isFile()) {
@ -1199,7 +1220,21 @@ void loop()
// if it wasn't set in the IDENTIFY then grab it from the CDB
if(m_lun > MAX_SCSILUN)
{
m_lun = (cmd[1] & 0xe0) >> 5;
m_lun = (cmd[1] & 0xe0) >> 5;
if(megaste_mode)
{
// if this mode is enabled we are going to substitute all SCSI IDs as LUNs on ID0
// this is because the MegaSTE internal adapter only supports ID0. This lets multiple
// devices still be used
LOG(" MSTE MODE ID:"); LOG(m_id); LOG(" LUN:"); LOG(m_lun);
if(scsi_device_list[m_lun][0].m_fileSize)
{
m_id = m_lun;
m_lun = 0;
LOG(" => ID:"); LOG(m_id); LOG(" LUN:"); LOG(m_lun); LOG(" ");
}
}
}
LOG(":ID ");