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1. asm & tamsyn & bytes, oh my! (millihertz@oldbytes.space)'s status on Monday, 04-Apr-2022 11:14:07 UTC asm & tamsyn & bytes, oh my!

   i've just done a tour of every PC emulator i can find that claims to do 8086 emulation, and not one of them does the right thing with

   c:>debug
   -afffe
   1234:FFFE call 1234
   1234:0001
   -a1234
   1234:1234 ret
   1234:1235
   -t=fffe
   

   with one exception - well done bochs! - emulators end up at CS:0x34. bochs, and real post-286 hardware, crash with a protection fault (well, bochs goes into an infinite loop, but that's close enough). but an 8086 will end up calling CS:0x1234, and anything that claims to specifically emulate an 8086 should emulate that behaviour too!

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   • asm & tamsyn & bytes, oh my! (millihertz@oldbytes.space)'s status on Monday, 04-Apr-2022 11:14:08 UTC asm & tamsyn & bytes, oh my!

     in reply to

     fixed it in my copy of fake86, at least - just needed getmem16 and putmem16 turned into functions to spot and deal with the edge case

     (adding 8080 emulation to the V20 model is another day's project ;-) especially since i don't actually have a V20 to test it against)

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