INT 40 - Acorn BBC Master 512 - "OSFIND" - OPEN FILE AL = operation 00h close file 40h open file for reading 80h open file for writing C0h open file for random access DS:BX -> CR-terminated filename Return: AL = file handle (00h if file closed or could not be opened) Note: the Acorn BBC Master 512 is an 80186-based add-on board for the 6502-based Master 128 which uses the original CPU(Central Processing Unit) The microprocessor which executes programs on your computer. as an I/O processor SeeAlso: INT 41"Acorn",INT 42"Acorn",INT 43"Acorn",INT 44"Acorn",INT 4C"Acorn"