The bottom 8 bits were alway zero, so all you could really do was 8 row (1280 byte) vertical scrolling. I don’t think you could change the screen base address mid-frame either, so you’d need a double-height buffer to do a continuous scroll.

The STe fixed both of these problems, and had variable wid5h rows and the pixel offset thing too. That meant a setup that was roughly equivalent to a 4-bit Amiga screen, though with interleaved bitplanes (which is not necessarily a bad thing).