Artist graphics registers (used in HP9000/712)

Artist is the onboard graphics chip used in the HP9000/712. According to HP, it’s mostly compatible to CRX. On the 712, it spans the I/O memory range 0xf8000000-0xf9ffffff. Unfortunately no documentation seems to be available, but this is what i figured out by looking at the memory write from the Bootrom/STI code:

Offset	Size	Description
0x1004a0	Word	VRAM offset (write index) for write FIFO registers
0x1005a0	Word	Bitmask for WRAM write FIFO - only bits set both in the data and this bitmask will be changed
0x100800	Word	Block mover source X=Bit31-16 Y=Bit15-0
0x100a04	Word	Block mover size Width=Bit31-16 Height=Bit15-0
0x100600	Word	Word mode VRAM write FIFO, with every write the number of X pixels is added to the write index.
0x100620	Word	Byte mode VRAM write FIFO, with every write the number of X pixels is added to the write index
0x118010	Word	foreground color used in block move operations
0x118014	Word	background color used in block move operations
0x30023c	Word	Used in selftest code, looks like signature testing result register?
0x380008	Word	Unknown status register, returning 0x20000000 to make STI happy
0x380000	Word	Unknown status register, returning 0 to make STI happy
0x380008	Word	Unknown status register, returning 0x20000000 to make STI happy
0x0118406c-0x011847ff	Word	Color map used by STI code - Strange offset address, maybe software configurable? One entry spans 32 bit, where Bit 23-16=R, Bit16-8=G, Bit7-0=B