Int 21H Function 63H
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Description: Get Lead Byte Table
Obtains the address of the system table of legal lead byte ranges for
extended character sets, or sets or obtains the interim console flag.
Int 21H Function 63H is available only in MS-DOS version 2.25; it is
not supported in MS-DOS versions 3.0 and later.
Input Output
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AH=63H If function successful
AL=subfunction Carry flag=clear
00H if getting address of and, if called with AL=00H
system lead byte table DS:SI=segment:offset of lead
01H if setting or clearing byte table
interim console flag or, if called with AL=02H
02H if obtaining value of DL=value of interim console
interim console flag flag
If AL=01H If function unsuccessful
DL=00H if clearing interim Carry flag=set
console flag AX=error code
01H if setting interim
console flag
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