Ater using the HP45 chips in my ET4000 I have run into an issue. Games like commander Keen and Bio Menace have serious graphic corruption. They have a few SVGA compatiblity command line switches to try out but they made no difference. In bio menace the menu screen was horribly corrupted and in game there was this large purple checkerboard pattern- hard to describe but basically it was overlaid onto the game graphics, everything in a large square was tinged purple.
I pulled the chips off and put the BP60 back in, and it works fine, although its only 1MB. I did not notice this in any other games like doom, hexen, sim city 2000 etc.
So its either some of those HP45 chips are faulty, or they are incompatible with the card, or the card is faulty when running with 2MB memory.