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AX = 1003h BL = new state 00h background intensity enabled 01h blink enabled BH = 00h to avoid problems on some adapters
Return:
Nothing
Notes: Although there is no function to get the current status on adapters prior to the VGA, bit 5 of 0040h:0065h indicates the state; on the VGA, use AH=1Bh and check offset 2Dh of the returned data (see #00040). When configured for a monochrome display, the Boca Research Multi-EGA with ROM v M1.1 Type D has its screen disrupted if BH is not clear. This call is reported to be "Get Cursor Position" on the Tandy 1000SL/TL
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