Dpaint 4.5 and 5 were AGA.
On amibay"
Max transfer and mask
When using onboard IDE and scsi.device, a maxtransfer setting of 0x1fe00 (or lower) is required on all partitions with any file system (to avoid read- and write-errors).
Be aware that wrong (too high) values are mentioned too many times on EAB.
Specific max transfer settings are not required if you use IDEfix97 on internal IDE, when using PFS3 All-in-One or when using PCMCIA
I do not know which drivers for third party IDE controllers are affected. It is likely that drivers made before 1994 (before EIDE, and later ATA-2 in 1996) are affected.
The maxtransfer setting limits the max size of one file transfer. It has no effect on speed. (Even battlefield 3 uses 128kB and less )
The reason for the max transfer issue has recently been found, see this thread. (Also due to changing ATA specs)
Mask settings are for DMA capable controllers and not required for Amiga IDE or PCMCIA use.
http://www.amibay.com/showthread.php?t=19899
