Using GSI Model 18 Add-in IDE Controller Causes STOP 0x7B

CAUSE

This problem does not occur unless the add-in controller also has some device attached, such as a fixed disk. Because the system is not PCI, ATAPI does not control the second channel, but ATAPI must look at the devices on the card, to see if any are ATAPI. After ATAPI determines that it is not to use the second channel, it goes back to the boot device and reads Cylinder 0, Head 0, Sector 1 (Partition Table / MBR). At this point, for unknown reasons, it retries the read until the retries run out (even through the data received looks legitimate). It then determines that the boot device cannot be accessed, which causes the Blue Screen STOP message. The impact of this problem is small because most systems today do not use add-in IDE controllers.