apple-pascal-1.3-manual

Here are some notes about handling the parameter values listed above:o All values are pushed onto the stack high byte first. Hence your 6502routine will pull each one off starting with its least significant byte.o When pointers are passed (strings, arrays, records, and all variableparameters), your routine must use indirect addressing to access thevariables they point to.o When long integers or sets are passed (as value parameters), the firstbyte your 6502 routine pulls off the stack gives the number of words ofstack occupied by the parameter. The next byte is 0. The succeedingbytes will contain the actual parameter value, least significant byte first.Ill-146Chapter 9: Assembly-Language Routines