Dear All, I'm working on an interrupt handler and I'd like to use some more general procedures in the handler, ie call these other procedures. Does anyone know how this might affect the stack and if this is allowed? the problems I see are: 1, If interrupt context stored in general call stack - futher calls may overflow stack. 2, If interrupt context stored in interrupt context stack - any calls may corrupt normal call stack Anyone have any guidance on where the interrupt context is saved before entry to a handler and caveats on calling procedures from a handler? cheers Mike *************************************************************************** M. Harrison TEL 44 1235 445288 Space Science division Fax 44 1235 445848 Rutherford Appleton Lab email m.c.harrison@rl.ac.uk Building R25 Room 2.124 mike@leyenda.demon.co.uk Chilton Oxon OX11 0QX UK ***************************************************************************