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- From: erlebach@Informatik.TU-Muenchen.DE (Thomas Erlebach)
- Subject: Re: Writing a StarField. Which method is best?
- References: <1992Nov7.104910.60476@cc.usu.edu> <1992Nov11.131803.1276@ifi.uio.no> <1948@lysator.liu.se> <erlebach.721646577@unknown> <1992Nov13.152639.28756@ifi.uio.no>
- Sender: news@Informatik.TU-Muenchen.DE (USENET Newssystem)
- Organization: Technische Universitaet Muenchen, Germany
- Date: Mon, 16 Nov 1992 10:21:09 GMT
- Message-ID: <erlebach.721909269@unknown>
- Lines: 15
-
- larshaug@ifi.uio.no (Lars Haugseth) writes:
-
- >> Before he uses the stack again, he restores the original stack pointer.
- >> This programming technique is perfectly allright.
-
- >As long as I have turn off all interrupts, than is...
-
- Unless you switch to SuperVisor mode (which you didn't in your
- starfield routine, as far as I saw), you needn't turn off all
- interrupts. When an interrupt occurs, the system uses the
- SuperVisor-Stackpointer, which is not changed by your
- LEA $1000,a7
-
- E.T.
-
-