Tandy 600 Programmer's Reference Manual page 48

Bios programmers
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FUNCTION 4Dh
-
Retrieve
Process
Termination
Code
Entry:
AH
-
4Dh
(function
code)
AX
BX
CX
DX
SP:
BP:
SI:
Dl:
IP:
FLG
CS
DS
ss
ES
XXXXXXXX
XXXXXXXX
Exit:
AX
-
Process
termination
code
Function
4Dh
will
return the
termination
code
set
by
the
last
program which
terminated
via
function
4Ch.
43

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