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wd33c9x: Add support for the Translate Address command

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This commit is contained in:
Dirk Best 2025-02-02 16:30:00 +01:00
parent 32736e4c43
commit 84f1bc2952
1 changed files with 32 additions and 0 deletions
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32
src/devices/machine/wd33c9x.cpp
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@ -807,6 +807,38 @@ void wd33c9x_base_device::start_command()
step(false);
break;
case COMMAND_CC_TRANSLATE_ADDRESS:
LOGMASKED(LOG_COMMANDS, "Translate Address Command\n");
{
uint8_t total_sectors = m_regs[CDB_1];
uint8_t total_heads = m_regs[CDB_2];
uint16_t total_cylinders = m_regs[CDB_3] << 8 | m_regs[CDB_4];
uint32_t lba = (m_regs[CDB_5] << 24) | (m_regs[CDB_6] << 16) | (m_regs[CDB_7] << 8) | (m_regs[CDB_8] << 0);
LOGMASKED(LOG_COMMANDS, "total_sectors=%02x, total_heads=%02x, total_cylinders=%04x, lba=%08x\n", total_sectors, total_heads, total_cylinders, lba);
uint16_t cylinder = lba / (total_sectors * total_heads);
uint8_t head = (lba - (cylinder * total_sectors * total_heads)) / total_sectors;
uint8_t sector = (lba - (cylinder * total_sectors * total_heads)) % total_sectors;
LOGMASKED(LOG_COMMANDS, "-> cylinder=%04x, head=%02x, sector=%02x\n", cylinder, head, sector);
m_regs[CDB_9] = sector;
m_regs[CDB_10] = head;
m_regs[CDB_11] = cylinder >> 8;
m_regs[CDB_12] = cylinder >> 0;
m_regs[AUXILIARY_STATUS] &= ~(AUXILIARY_STATUS_CIP | AUXILIARY_STATUS_BSY);
if (cylinder >= total_cylinders)
irq_fifo_push(SCSI_STATUS_LOGICAL_ADDRESS_TOO_LARGE);
else
irq_fifo_push(SCSI_STATUS_TRANSLATE_SUCCESS);
update_irq();
}
break;
case COMMAND_CC_TRANSFER_INFO:
LOGMASKED(LOG_COMMANDS, "Transfer Info Command\n");
if (m_mode != MODE_I) {