Quote:
Originally Posted by AmigTart
Actually, max sector count by IDE (ATA) is 256 sectors, because 0 in sector count registers means not 0 (nonsense) but 256 .
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Agreed, but I didn't want to confuse people. The largest number of sectors possible in a non zero 8-bit number is still 255 which corresponds to MAX TRANSFER of 0x1FE00 bytes.
Quote:
Originally Posted by AmigTart
With 48-bit LBA (what is necessary with drives over 128GB) max count is 65536 as sector count is given as 16-bit value.
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The recent patches to the Amiga IDE scsi.device which adds ATA-6 command set (48-bit LBA) may have increased the sector count to 16-bit but I don't know. Can anyone confirm?
You would need this version of scsi.device in your Kickstart ROM or eFlash/Kickflash/Deneb to be able to boot from a device with a the MAX TRANSFER set to larger than 0x1FE00. This is going to be a VERY small set of people.
I thought that I had used the scsi.device (45.45) with 48-bit LBA support using a MAX TRANSFER larger than 0x1FE00 with a SanDisk CF card and had data corruption. I will be able to confirm soon as I'm making my own KS3.9 EPROMs for my A4000