Hi y'all!
On 30-Sep-02, Scott wrote:
->Given that ProDOS 8 only knows how to deal with 24-bit block numbers (and
->I'd assume that you're currently using MLI calls to read/write blocks in a
->partition), the limit you describe is a limit of the OS. To access larger
->partitions, you'll somehow need to talk to the SCSI controller directly
->(after identifying it first so you don't try to treat a RamFAST as an Apple
->DMA SCSI card) and read the appropriate block directly from the disk. I'm
->not sure where you'd find information on using the various Apple II SCSI
->cards to do direct access to the blocks on a disk...I know that the RamFAST
->manual, to name one example, didn't have that info in it.
Thanks so much for confirming what I suspected.
The source for Chinook SCSI Utilities has code that accesses both revision
'C' and DMA (aka High Speed) Apple SCSI cards. I'll have to study the access
logic.
By the way,I was able to modify that program to partition Zip disks with a
IIgs and a rev. 'C' card.
Willi
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