INT 10 - Chips & Technologies Extended BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - GET LAPTOP DISPLAY STATUS AX = 5F50h Return: DL = display status (see #00183) Note: this call can be used on Toshiba laptops since ~1995 instead of INT 42/AX=7503h which is no longer supported with the F655xx chips SeeAlso: INT 42/AX=7503h Bitfields for display status: Bit(s) Description (Table 00183) 7-4 always 0 ??? 3 1: both displays active (bit 1 also set) 2 1: normal (monochrome display only), 0: inverse or color 1 1: internal display active, 0: external only 0 always set ???
INT 10 - Chips & Technologies '65530' BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - GET 655xx INFORMATION AX = 5F50h Return: AL = 5Fh if function supported AH = status 00h unsuccessful 01h successful BX = width of flat panel in pixels CX = height of flat panel in pixels DX = F65520/525/530 status (see #00184) SeeAlso: AX=5F51h,INT 15/AX=5F31h Bitfields for C&T F65520/525/530 status: Bit(s) Description (Table 00184) 15-0 reserved 6-5 type of clock chip 00 = 404 01 = 404A 10 = 404B ES 11 = 404B 4 accelerator enabled 3 both displays active 2 video polarity (1 = inverted) 1 output device 0 CRT 1 flat panel (LCD(Liquid Crystal Display)) 0 reserved