#mc68000 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #mc68000, aggregated by home.social.
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All of them side by side #MC68010, #MC68020, #MC68030 and #MC68040. Absent from this pic here is my framed #MC68000 which ended somewhere in the cellar (along with my framed #AtariTT) after we have moved to a new house and the #MC68060 which is unaffordable right now #Atari #Amiga #m68k #retrocomputing
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All of them side by side #MC68010, #MC68020, #MC68030 and #MC68040. Absent from this pic here is my framed #MC68000 which ended somewhere in the cellar (along with my framed #AtariTT) after we have moved to a new house and the #MC68060 which is unaffordable right now #Atari #Amiga #m68k #retrocomputing
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Are there any #MC68000 #mc68k gurus in the audience?
If a program running in usermode accesses the vectors via a data access instruction - what does the 68010 indicate on the function code pins?
Are vector reads escalated to being supervisor code/data reads, even though the code which triggered them is user-mode?I'm trying to figure out why dereferencing a null pointer is 'fine' on a real #UnixPC but causes problems with the FreeBee emulator (if I disable vector access promotion).
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Are there any #MC68000 #mc68k gurus in the audience?
If a program running in usermode accesses the vectors via a data access instruction - what does the 68010 indicate on the function code pins?
Are vector reads escalated to being supervisor code/data reads, even though the code which triggered them is user-mode?I'm trying to figure out why dereferencing a null pointer is 'fine' on a real #UnixPC but causes problems with the FreeBee emulator (if I disable vector access promotion).
