Hi at the piclist,

I don't know if somebody has already requested the instruction (or
Microchip has even announced it):

To my opinion the interrupt response time is prolonged unneccessarily
by saving the flags and working file (the trick with SWAP .. there
is an application note about it...)

I would like to have a single instruction to push and pop both
registers in a device like the 16C84 or 16C71.

(Or even better (though maybe not easy to implement):
 The optimum would be kind of REFFIEWF which restores the registers
 in a single instruction and returning from interrupt.
 If Flags and W File were already saved
 when the PIC starts executing at 004 (the interrupt adress)
 one could cut response time even further)

Bye

Frieder







----
; Frieder Ferlemann
; Institut fuer Umweltphysik
; Im Neuenheimer Feld 366, Zi 410
; D-69120 Heidelberg
; Tel.: 06221 563385 oder 563334
; Fax:  06221 563405
; Email: FE@uphys1.uphys.uni-heidelberg.de
;
; To be scanned by BundesNachrichtenDienst: Embargo, G3, Police