siig UltraATA 133/100 Pro (Acard chipsetl 6280M rebranded?)

[macStuff]

siig UltraATA 133/100 Pro https://web.archive.org/web/20021020085722/http://siig.com/products/ide/features/UltraATA133_100Pro.html

looks like an Acard 6280M
https://web.archive.org/web/20020821181458im_/http://siig.com/images/products/IDE_UltraATA133PCI.jpg 
Part Number: SC-MP4A12

Key Features and Benefits

    Direct support from Mac OS 8.6 or later, 9.x and OS X
    Works with various brands of Ultra ATA 133/100/66/33 hard disk drives
    Auto-detects drive types and fine tunes to the best performance for each Ultra ATA drive
    Breaks the 137GB barrier! Supports various types of large capacity hard disk drives
    Achieves burst data transfer rates up to 133MB/sec when connected to Ultra ATA/133 drives

System Requirements

    Power Mac G3/G4 or Mac computers with one available PCI slot
    Mac OS 8.6 or later