3b1emu / changelog

Fix bit masking logic in 'dead bus' return

• Sat, 17 Nov 2012 22:14:09 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Sat, 17 Nov 2012 22:14:09 +0000] rev 114
• Fix bit masking logic in 'dead bus' return
  
  In some cases (e.g. 16bit reads) a bad 'idle bus' return may be provided.
  Promote the '1' to unsigned long prior to left-shifting it.

ACCESS_CHECK_RD should return the right number of bits!

• Sat, 17 Nov 2012 21:28:48 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Sat, 17 Nov 2012 21:28:48 +0000] rev 113
• ACCESS_CHECK_RD should return the right number of bits!
  
  If the ACCESS_CHECK_RD() macro detects a page fault, it always returns a
  32-bit error response ("all bus pins high"). Musashi really doesn't like it
  when we pass in a 32-bit value when it expects a 16-bit one!