ocr: h-? h h h paramBlock paramBlock paramBlock paramBlock stack stack stack stack ptr to pb ptr to pb copy ofl h return address Application Application Application Application CODE CODE CODE CODE XCMD XCMD XCMD master ptr master ptr master ptr Initial State with Get1NamedResource loads CallXCMD pushes some Glue code removes handle paramBlock and h as XCMD' resource into stuff on the stack for the from stack and does JSR tc global variables application heap glue code address in master pointer Figure 3-Calling an 'XCMD' from Pascal
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