3b1emu / changelog

Fix read-after-write logic experimental_memory_mapper_v2

• Fri, 12 Apr 2013 12:34:32 +0100
• by Philip Pemberton <philpem@philpem.me.uk> [Fri, 12 Apr 2013 12:34:32 +0100] rev 140
• Fix read-after-write logic
  
  In some cases (notably reading from a page after having written to it), the
  mapper may change the pagestate from "accessed and written" ("dirty"; PS0,PS1)
  to "accessed but not written" (clean; PS1,!PS0). This should never, ever, EVER
  happen. Once a page is dirty, it remains so until the 68k clears the DIRTY
  bit.
  
  Once again, this wonderful bit of logic was missing from the TRM.

Fix potential unassigned variable

• Thu, 11 Apr 2013 09:37:25 +0100
• by Philip Pemberton <philpem@philpem.me.uk> [Thu, 11 Apr 2013 09:37:25 +0100] rev 139
• Fix potential unassigned variable

Check return value of fread()

• Thu, 11 Apr 2013 09:37:11 +0100
• by Philip Pemberton <philpem@philpem.me.uk> [Thu, 11 Apr 2013 09:37:11 +0100] rev 138
• Check return value of fread()

Enable code optimisation to improve quality of GCC warnings

• Thu, 11 Apr 2013 09:36:53 +0100
• by Philip Pemberton <philpem@philpem.me.uk> [Thu, 11 Apr 2013 09:36:53 +0100] rev 137
• Enable code optimisation to improve quality of GCC warnings

Code cleanup

• Thu, 11 Apr 2013 09:18:31 +0100
• by Philip Pemberton <philpem@philpem.me.uk> [Thu, 11 Apr 2013 09:18:31 +0100] rev 136
• Code cleanup
  
  * Fix some compiler warnings --
  * string format
  * shift greater than type size,
  * unused variable.

merge changes from default experimental_memory_mapper_v2

• Wed, 13 Mar 2013 01:10:34 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Wed, 13 Mar 2013 01:10:34 +0000] rev 135
• merge changes from default

[wd2010,main] WD2010 disc geometry fixes

• Wed, 13 Mar 2013 00:43:25 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Wed, 13 Mar 2013 00:43:25 +0000] rev 134
• [wd2010,main] WD2010 disc geometry fixes
  
  I believe I have fixed the geometry problem with FreeBee. The geometry was set
  to 17 sectors per track instead of 16, which obviously throws off addressing.
  I changed it to use 16 sectors per track. However, s4diag tries to format
  sector 17, so I changed the WD2010 emulation to accept any address when
  formatting (since the format command doesn't actually do anything, it doesn't
  matter). It is now possible to format the hard disk, initialize the file
  system, and mount it. However, cpio still fails to copy the system to the hard
  disk.
  
  Author: Andrew Warkentin <andreww591 gmail com>

use MAP_ADDR_TO_PAGE for memory mapping experimental_memory_mapper_v2

• Wed, 13 Mar 2013 00:40:42 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Wed, 13 Mar 2013 00:40:42 +0000] rev 133
• use MAP_ADDR_TO_PAGE for memory mapping

merge in changes from default branch experimental_memory_mapper_v2

• Fri, 18 Jan 2013 22:52:43 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Fri, 18 Jan 2013 22:52:43 +0000] rev 132
• merge in changes from default branch

add TODO

• Fri, 18 Jan 2013 18:51:50 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Fri, 18 Jan 2013 18:51:50 +0000] rev 131
• add TODO

[wd2010] disable DMA pagefault workaround (no longer required)

• Fri, 18 Jan 2013 17:20:07 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Fri, 18 Jan 2013 17:20:07 +0000] rev 130
• [wd2010] disable DMA pagefault workaround (no longer required)

[memory] Emulate main memory read wrap-around

• Fri, 18 Jan 2013 17:18:50 +0000
• by Philip Pemberton <philpem@philpem.me.uk> [Fri, 18 Jan 2013 17:18:50 +0000] rev 129
• [memory] Emulate main memory read wrap-around
  
  3B1s with 512K or 1MB of base memory have a decoding quirk which causes reads
  to 'wrap around'. That is to say, on a 512K machine, reading from addresses 0,
  512K, 1024K or 1536K will address the same RAM byte. On a 1MB machine,
  addresses 0 and 1024K address the same RAM byte.
  
  Emulating this incorrectly causes P4TEST to report an incorrect amount of
  available base RAM.