PORTIBM PC Portable (uses same BIOS as XT) AEE8-AEEB - 8514/A and compatible - READ MASK Desc: specify which bit planes are used as a data source 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) AAE8h,PORTIBM PC Portable (uses same BIOS as XT) B2E8h AEE8w -W drawing control: read mask AEE8d RW (S3) drawing control: read mask for 32bpp modes