+ V1.4.1 27/10/17
-----------------
++ HDL
wb_yam  New YAM management unit V1.0.
        Remote program load/dump, debug breakpoint, stepping...
        Whishbone interface port from 'ebs_yam' E-bone release.

++ OHR distribution hierarchy revisited.
hdl/      YAM (with wb_yam sub-directory)
yamasm/   YAM assembler
yamebs/   Software support for wb_yam.
          As is from ESRF; external dependencies pending...

++ 'yamasm' assembler V1.1
Add 3-operand ISA support.
Add IORMW instruction support
JMP/JSR allow displacement > 16 bits.
Enhanced parsing error messages.

+ V1.4  03/03/17
----------------
++ YAM
ISA upgrade to 3-operand ALU, selectable; new generic ALU_3OP.
ALU level 1 instructions are all becoming 2-operand type.
External address ports are now constraint in size.
Bug ABS instruction flag Z incorrect fixed.
Added IORMW instruction and associated generic IOP_RMW.

++ Co-processors
Fixed point co-processor synthesis failure fixed.
COPM address ports is now constraint in size.

++ IO
Interconnection io_wait(n) de-mux (no longer ORed together)

++ Documentation
Updated.
New introduction about YAM development motivations.
Instruction list revisited for better readability.

++ 'yamasm' assembler
3-operand ISA not supported yet.

+ V1.3  20/11/16
----------------
++ YAM
Bug COP Memory indirect addressing fixed.
Minor improvement.

++ Co-processors
Add fixed point co-processor.
Revisited (faster) floating point co-processor.

++ Documentation
Updated.

+ V1.2  20/10/16
----------------
++ YAM
Add RX/RY index pointers to register memory.
Add LDYX, MOVX instructions.
Add SPR7 (multiplier result MSW).
Add debug/stepping mode.
 New generic YAM_DBG.
 New ports dbg_rq_i, dbg_stat_o.

++ Documentation
Updated.

+ V1.1  29/09/16
----------------
++ YAM
Bug N flag fixed.
Bug dis-assembler fixed.
Add SUBC instruction.
Add ABS instruction.
Add Byte move instructions.
Remove SHR16 instruction.
Add co-processor result memory.
Add co-processor result input port.
Add COPM_SIZE generic; remove COP_NB generic.

++ IO
Add AXI4-lite interface.
Add time-out to WB interface.

++ Documentation
Minor errors fixed.
Several improvements.

+ V1.0  24/08/16
----------------
1st stable release.