UserDump Setup user-defined error buffer dump in CW.ERR
Inputs: AX = 0ff2fh
ES:[E]DI -> user buffer to display in CW.ERR
CX = count of bytes to display from buffer in CW.ERR
BL = 'A' if ASCII dump (non-binary display of bytes, control characters display as periods)
BH = nonzero if preset ASCII buffer to word value, ignored for non-ASCII
DX = word value to fill ASCII dump buffer if BH is nonzero, ignored for non-ASCII
Outputs: Carry set on ASCII dump invalid buffer address.
Errors: The user buffer must be a valid readable selector and offset value when this function is called or else the request is ignored and a carry flag condition is returned. If BH is set to nonzero to flag presetting the buffer bytes, the selector must be writable. Specifying a larger CX count than available buffer size will also return an error.
Notes: If the fill ASCII buffer condition is specified, any values previously in the buffer will be overwritten when this call is made.
UserErrTerm Call user error termination routine
Inputs: AX = 0ff31h
CL = 0 if 16-bit termination routine
CL = nonzero if 32-bit termination routine
DS:[E]SI = user termination routine address.
If DS is zero, the user termination routine call is removed.
ES:[E]DI = Information dump buffer address, 104 bytes. If ES is zero, no information dump is performed.
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