Version 1.3 May 6, 2016

• CPU: Significant speed improvement by removing old tristate driver:
  Evolution can be seen in mandel_perf_test.asm, which is now ~32% faster.
  Q-TRIS was even ~56% faster (now adjusted back to normal speed).
• CPU: Fixed a bug that prevented things like CMP 0x00AA, 0x00FF or things
  like OR @r0++, @r0, i.e. situations, where both operands perform an
  indirect access, where the source and destination operands are identical
  and where the source operand is post-incremented.
• ALU: Fixed CMP opcode behaviour: using the N flag it now treats the
  operands as unsigned and using the V flag it treats them as signed.
• ALU: Fixed V flag CPU bug (AND, OR, XOR)
• CYCLE COUNTER: Added. Counts clock cycles. Can be used for performance
  testing, as shown in test_programs/mandel_perf_test.asm.
• DEBUG MODE: If switch #2 is ON, then the LEDs are showing the current
  address bus value in real-time and on HALT the TIL shows the address
  of the executed HALT command.
• ASSEMBLER: Is able to handle labels on separate lines, improved error
  handling, CMP allows a constant as second operand.
• EMULATOR: Fixed CMP opcode behaviour (see above), fixed similar CPU bug
  as described above. Outputs address of HALT instruction. Also emulates
  the new cycle counter (register compatible), but instead of counting
  clock cycles, it is counting instructions.
• DOCUMENTATION: Added a programming card.