The phase5 Blizzard 1230 IV accelerator has one 72pin sim slot that can take 72pin simms upto 128Mb in size.
It can also have a SCSI expansion card fitted, that also has a 72pin simm slot, that can take simms upto 128Mb in size.
so in total, 256Mb of ram can be added to the Blizzard 1230 IV
WHDLoad doesn't have any problems running with this much ram. infact, the more the better, as you can then tell WHDLoad to precache all the game data into memory, making WHDLoad games run much faster with regard to loading times.
try not to use PCMCIA memory cards unless you have to, as they are on a 16Bit bus, not a 32bit bus - so much slower than ram on an accelerator card.
question. how do you mean that the ram on your accelerator card is limited to octamed pro?