Siemens Simatic S5 PG 730 Systemhandbuch Seite 105

Systemhandbuch
(ah) = 85h system request key pressed
(al) = 00 make of key
(al) = 01 break of key
on return: ah = 0; cf=clear if successful
ah = status; cf=set if unsuccessful
(ah) = 86h wait
(cx,dx) (High-,Low-Byte) number of microseconds to elapse before
return to caller
on return: cf=clear if successful (wait performed)
cf=set if unsuccessful (wait not performed)
(ah) = 87h move block
(cx) number of words to move
(es:si) pointer to a 48-byte descriptor table
on return: cf= clear no error ah= 0: successful move
cf= set error
C79000-B8500-C073-01
ah= 1: RAM parity error
ah= 2: other exception interrupt error
ah= 3: gate address line 20 failed
ROM-BIOS
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