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342 lines
11 KiB
Plaintext
342 lines
11 KiB
Plaintext
2.0.0.dev0 (Next Release)
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-------------------------
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- Support for some older Python versions has been dropped. On Python 3,
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Py65 now requires Python 3.4 or later. On Python 2, Py65 now requires
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Python 2.7.
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1.1.0 (2018-07-01)
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------------------
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- The ``Monitor`` class now allows the default memory to be supplied in
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the constructor. Patch by Irmen de Jong.
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- Fixed a bug where setting the MPU via ``py65mon`` command line arguments
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would have no effect. Reported by Michael A. Morris, patch by Ed Spittles.
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- The ``itoa()`` function in ``conversions.py`` now raises an error when an
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unsupported base is given. Patch by Scot W. Stevenson.
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- The unused hexdump loader utility has been removed.
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1.0.0 (2017-05-11)
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------------------
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- Fixed a bug where the ordering of ``py65mon`` command line arguments
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produced different results. Arguments can now be specified in any
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order. Patch by Mario Keller.
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- Added new ``--input`` and ``--output`` arguments to ``py65mon`` that
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allow the addresses of the ``getc`` and ``putc`` handlers to be
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changed. Patch by Mario Keller.
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- Fixed a 65C02 bug where the TSB and TRB instructions did not set
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the Z flag correctly. Thanks to Kris Kennaway for reporting it.
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0.24 (2015-03-31)
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-----------------
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- Released as a universal wheel.
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0.23 (2015-02-10)
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-----------------
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- Added a workaround to $F001 output to catch encoding errors and
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display a "?" instead of crashing. This condition can occur if
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the 6502 program sends bytes to $F001 that aren't compatible with
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the terminal's character encoding.
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0.22 (2015-02-09)
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-----------------
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- Fixed a bug where ``py65mon --rom`` would raise an exception
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on Python 3.
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0.21 (2015-02-09)
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-----------------
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- Added support for breakpoints in the monitor. Contributed by
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Alessandro Gatti.
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- ASCII literals are now supported by the assembler. The statement
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"LDA #'A'" is equivalent to "LDA #$41".
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- Fixed console input when run under Python 3 on Windows. Closes #27.
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0.20 (2014-05-08)
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-----------------
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- Page wrapping for indexed indirect (X) operations on 65C02 has been
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restored. This reverts the change introduced in 0.18. We now believe
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that this mode works the same on the 65C02 as it does on the 6502.
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0.19 (2014-03-12)
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-----------------
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- Fixed 65C02 opcode $D2: CMP Zero Page, Indirect.
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- Blocking character input at $F005 has been removed. The I/O area
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was designed to be compatible with Michal Kowalski's simulator,
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and it uses this address for another purpose. Examples that depended
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on $F005 have been changed to use $F004.
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0.18 (2014-01-30)
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-----------------
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- Fixed a bug in RTS where popping $FFFF off the stack would cause
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the program counter to overflow to $10000. It now wraps around
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to $0000 as it should. Thanks to Gábor Lénárt for reporting it.
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- Fixed BRK on 65C02 so it clears the decimal flag. On NMOS 6502, the
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decimal flag is unaffected on BRK. On 65C02, it is always cleared.
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- Assembling now tolerates extra whitespace between opcode and operand.
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- Removed page wrap bug from JMP indirect on 65C02.
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- Removed page wrap bug from indexed indirect (X) operations on 65C02.
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0.17 (2013-10-26)
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-----------------
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- Added support for Python 3.2 and 3.3 based on work by David Beazley.
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0.16 (2013-04-03)
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-----------------
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- Fixed a bug in the monitor that caused loading from the command
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line with "--rom" to crash.
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0.15 (2013-01-06)
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-----------------
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- Disassembling can now wrap around memory if the start address
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given is greater than the end address.
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- Fixed the disassembler to accept a range of "start:end" instead of
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"start:end+1" for consistency with the other commands.
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0.14 (2012-11-30)
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-----------------
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- Assembling now detects syntax errors, overflows, and bad labels
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separately and shows specific error messages.
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- Fixed assembling 65C02 opcodes whose mnemonics have a digit
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such as "RMB3".
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- Reformatted source code to comply with PEP8.
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- Fixed a bug where the MPU status display would wrap unexpectedly
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on some terminals.
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- Added support for 65C02 opcode 0x89: BIT #.
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- Added support for 65C02 opcode 0x7C: JMP (abs,x).
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- Assembling now shows an Overflow Error if the statement won't
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fit at the top of memory.
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- Fixed a bug in the disassembler where instructions that wrap past
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the top of memory would not be displayed properly.
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0.13 (2012-11-15)
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-----------------
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- Fixed a bug where negative numbers could be entered
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for addresses in the monitor.
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0.12 (2012-02-16)
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-----------------
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- Fixed a bug that caused ``help cd`` to raise an exception
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in the monitor.
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- Fixed a bug in the 65C02 simulation where the opcode 0x7A
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was named "PHY" instead of "PLY", causing incorrect assembly
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and disassembly. Thanks to Brian Cassidy for reporting it.
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- Fixed the cycle count of 0xD2 (CMP zero page indirect) in
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the 65C02 simulation. Thanks to Brian Cassidy for reporting it.
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- Added "h" as a monitor shortcut for "help".
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0.11 (2012-01-07)
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-----------------
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- Added a new 65Org16 MPU simulation written by Ed Spittles.
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- The monitor now accepts command line arguments. See
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``py65mon --help`` for usage. Contributed by Ed Spittles.
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- The monitor's load command can now fetch URLs.
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- Python versions earlier than 2.6 are no longer supported.
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0.10 (2011-08-27)
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-----------------
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- Fixed long-standing bugs in relative branch calculations in the
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assembler and disassembler. Based on a patch by Ed Spittles.
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- Zero page operations now have the correct page wrap around.
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Patch by Martti Kühne.
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0.9 (2011-03-27)
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----------------
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- Fixed two monitor tests that were broken under Windows. Thanks
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to Oscar Lindberg for reporting this.
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- Removed use of defaultdict to fix compatibility with Python 2.4.
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- Decimal mode bugs have been fixed. Thanks to Ed Spittles who
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ported Bruce Clark's tests to find failures and then rewrote
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the decimal handling code.
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0.8 (2010-03-08)
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----------------
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- Fixed deprecation warnings on Python 2.6
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- We no longer bundle ez_setup to bootstrap setuptools installation.
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- Restoring the processor status register from interrupt now correctly
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set the BREAK and UNUSED flags to be high. Thanks to Ed Spittles
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for reporting this.
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- Applied patch by Ed Spittles that fixes the behavior of the BREAK
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and UNUSED flags in the processor status register. Closes #16.
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- Added ">" as a monitor shortcut for the fill command for
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consistency with VICE.
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0.7 (2009-09-03)
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----------------
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- When using the monitor, the nonblocking character input at
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$F004 should now work on the Microsoft Windows platform.
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- Fixed that relative branch calculations would not use the correct
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start address when assembling in the monitor. Closes #10.
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- The processor status register ("p" or "flags") can now be changed
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in the monitor using the "registers" command with an argument of
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"p", such as "registers p=00".
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- MPU objects now return a two-line string as their __repr__ with
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the processor status register displayed as binary for readability.
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- The processor status register is now initialized to 0 on reset.
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Previously, its unused bit (bit 5) was set to 1 on reset.
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- Applied patch from Ed Spittles to change the CMP algorithm so that
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it no longer fails Rob Finch's test suite. Closes #8.
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- Added a new interactive assembly mode to the monitor. Entering the
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the assemble command with a statement such as "a c000 lda #0" works
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as before. Entering "a c000" will start the interactive assembler
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at that address. Entering "a" alone will start it at the current
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program counter.
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- Applied patch from Ed Spittles so that SBC now properly sets the
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Overflow (V) flag. This fixes a failure in Rob Finch's test suite.
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Closes #6.
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- Applied patch from Ed Spittles so that SBC now properly sets the
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Carry (C) and Zero (Z) flags. This fixes failures caught by Ed's
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own tests (see http://forum.6502.org/viewtopic.php?p=8854#8854).
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Closes #15.
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- A new "save" command has been added to the monitor that will save
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a range of memory to a binary file.
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0.6 (2009-08-11)
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----------------
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- Added monitor shortcut "a" for "assemble".
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- Fixed that ASL would not properly set the Z flag. Closes #7.
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- Fixed that ADC would not properly set the Overflow (V) flag. The
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overflow calculation that is now used originated from XGS: Apple
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IIGS Emulator (cputable.h). Originally written and Copyright
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(C)1996 by Joshua M. Thompson. Copyright (C) 2006 by Samuel A.
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Falvo II. http://bitbucket.org/kc5tja/lib65816/src/tip/src/cputable.h
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Closes #3.
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0.5 (2009-08-06)
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----------------
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- Fixed signatures of getc/putc callbacks in monitor that were broken
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when the ObservableMemory interface changed in 0.3. Closes #1.
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- Fixed that ROL would not properly set the Z flag. Closes #2.
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0.4 (2009-06-06)
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----------------
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- Added ez_setup.py to bootstrap setuptools installation.
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0.3 (2009-06-03)
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----------------
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- Added shortcuts for monitor commands such as "m" for "memory". These
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are mostly the same as the VICE monitor shortcuts.
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- The terminal width can now be changed in the monitor using the new
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"width" command. Some commands, like "mem", will wrap to this width.
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- Fixed a bug where BRK would increment PC by 3 instead of 2. Thanks
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to Oscar Lindberg.
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- Added a new 65C02 MPU simulation started by Oscar Lindberg. It is
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now mostly complete.
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- Added a new "mpu" command to the monitor. It will switch between the
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NMOS 6502 and CMOS 65C02 simulations.
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- A new "devices" module has been added to organize device simulations.
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- The mpu6502 and mpu65c02 devices have been reorganized internally to
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use Python decorators to build their lookup tables based on an
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idea by Oscar Lindberg.
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- A new "utils" module has been added with various utility functions.
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- The ObservableMemory interface has been changed for clarity.
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- Python 2.4 or later is now required.
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0.2 (2008-11-09)
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----------------
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- Added a new "disassemble" command to the monitor. It can disassemble
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any range of memory ("disassemble c000:c010"). If labels have been
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defined, the disassembly will show them in the operands.
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- Added a new "assemble" command to the monitor. It can assemble a
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single instruction at an address ("assemble c000 jsr $ffd2").
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Labels in the operands are also supported ("assemble c000 jsr charout").
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- Moved the character I/O area from $E000 to $F000 for compatibility with
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the EhBASIC binary saved from Michal Kowalski's Windows-based simulator.
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In a future version of Py65, the I/O area will be configurable.
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- When running a program in the monitor, a read to $F004 will now do a
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non-blocking read from STDIN. If no character is available, a null
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byte ($00) will be returned.
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- Fixed a bug where a CMP instruction could crash the simulator due to
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an undefined variable.
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- EhBASIC 2.09 now runs in the simulator!
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- Documented all remaining monitor commands. In the monitor, use the
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command "help command" for help on any command.
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0.1 (2008-11-21)
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----------------
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- First release.
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