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Atari coding BBS
| Re: Get VBCC+VASM+VLINK to work? |
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Posted by: ggn
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Aug,16.2013-17:30
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Well, the disassembly of supexec() is:
movea.l 4(sp),a0
jmp (a0)
And inside the XBIOS handler code there's the following:
btst #$D,d0 ;d0 has SR value
bne.s super_on
move usp,sp
super_on:
Which sets SSP to USP if called from user mode. In practice in plain GEM/TOS the user stack pointer is roughly below the screen address, so more or less the whole available memory chunk. So IMHO it seems pretty safe to use :)
(No idea what's happening in MiNT or other OSes, perhaps some kernel hacker can shed some light there?)
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Topic
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Posted by
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Date
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Get VBCC+VASM+VLINK to work?
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Sdw
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Aug,13.2013-00:22
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Re: Get VBCC+VASM+VLINK to work?
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Sdw
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Aug,13.2013-21:51
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Re: Get VBCC+VASM+VLINK to work?
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AdamK
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Aug,13.2013-22:28
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Re: Get VBCC+VASM+VLINK to work?
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PeP
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Aug,16.2013-07:59
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Re: Get VBCC+VASM+VLINK to work?
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Sdw
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Aug,13.2013-23:09
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Re: Get VBCC+VASM+VLINK to work?
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AdamK
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Aug,14.2013-06:59
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Re: Get VBCC+VASM+VLINK to work?
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Sdw
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Aug,14.2013-11:44
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Re: Get VBCC+VASM+VLINK to work?
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mikro
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Aug,14.2013-23:40
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Re: Get VBCC+VASM+VLINK to work?
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sqward
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Aug,16.2013-12:57
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Re: Get VBCC+VASM+VLINK to work?
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ggn
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Aug,16.2013-17:30
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Re: Get VBCC+VASM+VLINK to work?
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PeP
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Aug,19.2013-11:33
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Re: Get VBCC+VASM+VLINK to work?
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Orion_
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Aug,14.2013-01:08
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Re: Get VBCC+VASM+VLINK to work?
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Sdw
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Aug,14.2013-11:45
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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