PORTIBM PC Portable (uses same BIOS as XT) AAE8-AAEB - 8514/A and compatible - WRITE MASK Desc: specify which bit planes are updates when a pixel is written Notes: supported by ATI Mach8 and Mach32 chipsets supported by S3 chipsets when PORTIBM PC Portable (uses same BIOS as XT) 03D4h register 40h bit 0 is set SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) A6E8h,PORTIBM PC Portable (uses same BIOS as XT) AEE8h AAE8w -W drawing control: write mask AAE8d RW (S3) drawing control: write mask for 32bpp modes