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Copyright 1991 David Jurgens |
INT 21,55 - Create New PSP (Undocumented)
AH = 55h
DX = New PSP segment address
SI = memory size value to place in PSP offset 02h (DOS 3+)
returns nothing
- the following should be observed when using this function
o Allocate memory for the PSP and program code (INT 21,48)
o Duplicate the PSP (INT 21,55)
o Load program code into allocated segment above the new PSP
o Save Current PSP
o Set PSP to the PSP just created (INT 21,50)
o Jump to start of code if .COM otherwise handle relocation,
setup stack and registers
- similar to INT 21,26 except the PSP is setup by DOS
- increments reference count in SFT for all inherited files
- files flagged as not inheritable are marked as closed in the
new PSP
- invoked by INT 21,4B
- see UNDOC INT 21,4B INT 21,26
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int 21,55 |
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