search for: loadrba

...rovided by the system BIOS. Booting hard disks is working OK and I am now trying to get bootable CD/DVD disks to work using the following code: 1) Issue an ATAPI command to read sector 11h 2) Use the value at offset 47h to read the validation entry and initial section entry 3) Use the loadrba value from the initial section entry to read the first sector of executable code 4) Copy that sector to 07C0:0000 5) Pass execution to the start of the read sector at 07C0:0000 I am getting output on the screen from isolinux but it basically borks. The screen output from isolinux shows se...

...ittle further.... The code that currently does the following is executed as part of a replacement for the BIOS interrupt 19h bootstrap process. 1) Issue an ATAPI command to read sector 11h 2) Use the value at offset 47h to read the validation entry and initial section entry 3) Use the loadrba value from the initial section entry to read the first sector of executable code 4) Copy that sector to 07C0:0000 5) Pass execution to the start of the read sector at 07C0:0000 I have been reading the BIOS Enhanced Disk Drive Services (EDD) specification which defines the interrupt 13h in...