File Name:          SN54xx08_notes.txt

IEEE/std_logic_1164.pkg.vhd  -- 9-state logic system

STD_PACK/MISC_FUNC.vhd       -- miscellaneous functions
STD_PACK/TIME_FUNC.vhd       -- timing functions
STD_PACK/SIMFLAG_.vhd        -- simulation flag declarations
STD_PACK/SIMFLAG.vhd         -- simulation flag assignments
STD_PACK/TTL_TIMING.vhd      -- environmental derating coefficients

STD_WAVES/STANDARD/waves_system.vhd    -- describes Event Value objects
STD_WAVES/STANDARD/waves_standard.vhd  -- basic WAVES definition
STD_WAVES/LOCAL/waves_events.vhd       -- links events to logic values
STD_WAVES/STANDARD/waves_interface.vhd -- defines functions for application of
                                          input values and file input of vectors

waves_device_SN54xx08.vhd              -- test pins package
STD_WAVES/LOCAL/waves_frames.vhd       -- links event values to pin codes
STD_WAVES/STANDARD/waves_objects.vhd   -- defines functions that create slices
STD_WAVES/LOCAL/waves_utilities.vhd    -- defines functions to check responses
                                          and to output port values to a file

wgenerator_SN54xx08.vhd      -- WAVES test program
SN54xx08_timing.vhd          -- timing package
SN54xx08_TB.vhd              -- test bench entity/architecture
SN54xx08.vhd                 -- entity/architecture
SN54xx08_DIP14.vhd           -- structural entity-architecure for
                                physical package
SN54xx08_TB_CON.vhd          -- top level configuration of TEST BENCH

Revision History (by file):  

+--------------------------------------------------------------------+
| All files:                                                         |
+--------------------------------------------------------------------+
Version 2.1 updates

2-08-91  / S. Turner /
  SIMFLAG package is now in STD_PACK library
  New convention for capitalization:
    ALL CAPS :  variables, constants, functions, design units
    First_Cap:  type definitions
    all_lower:  reserved VHDL keywords

12-19-90 / G. Newell /
  Version 1.1 created

+--------------------------------------------------------------------+
| SN54xx08.vhd                                                       |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx08

08-06-91    / M. Meier /
  changed POWER to VCC-GND

08-02-91    / M. Meier /
  changed local output signal type to UX01Z.

07-30-91    / M. Meier /
  changed not(POWER ... to BIT_UNKNOWN(POWER)

07-28-91    / S. Turner /
  changed STD_PACK.LOGIC_SYSTEM to IEEE.STD_LOGIC_1164
  moved entity-declarations & architecture-bodies into 1 file

07-19-91    / M. Meier /
  added 'L' and 'H' states which were neglected

07-15-91    / M. Meier /
  added 'L' and 'H' states to AND_PROCESS.

07-15-91    / C. Collins /
  moved comments to DIP file

07-14-91    / S. Turner /
  removed GENERIC_VALUES option

07-02-91    / C. Collins /
  added operating conditions

2-08-91  / S. Turner / 
  Changed parameter names to reflect changed in entity's generic map

+--------------------------------------------------------------------+
| SN54xx08_timing.vhd                                                |
+--------------------------------------------------------------------+
Version 2.1 updates

08-01-91    / M. Meier /
  changed order of TPHL & TPLH in Prop_Times record to be correct.

07-29-91    / M. Meier /
  changed worst case tphl temperature

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file

07-16-91    / S. Turner /
  removed TIMING_PARAMS declaration

07-14-91    / S. Turner /
  removed GENERIC_VALUES option

2-08-91  / S. Turner /
  Added GEN_CWIRES and GEN_PARAMS to GET_TIMING() parameter list 
  Added KCHL and KCLH capacitance derating factors for each output pin
  Added capacitance derating coefficients for CALC_CURVE()
  Added WIRE_FACTOR constant to convert wire capacitance into delay time
  Following "EIA Timing and Environmental Data Specification" guidelines to 
    calculate missing manufacturer's timing parameters
  Changed parameter names to reflect changed in entity's generic map
  Eliminated GENERIC/TIMING/ANNOTATED option -- Generic timing parameters
    are now selected with the GENERIC_VALUES option of TIME_MODE in the 
    SIMFLAG package.  Back-annotation of capacitance values occurs automatically
    when capacitances other than the default are passed in.
  All PROP_DELAYS are now multiplied by the capacitance derating factor,
    in addition to voltage and temperature factors.

+--------------------------------------------------------------------+
| SN54xx08_TB.vhd                                                    |
+--------------------------------------------------------------------+
Version 2.1 updates


08-12-91    / M. Meier /
  changed library WORK to library SN54xx08

08-08-91    / M. Meier /
  removed WAVES ascii chart

08-06-91    / M. Meier /
  changed POWER to VCC-GND 

07-31-91    / M. Meier /
  changed Output_Format from WAVES to STANDARD 

07-28-91    / S. Turner /
  changed STD_PACK.LOGIC_SYSTEM to IEEE.STD_LOGIC_1164
  changed "OUT.DAT" to "out.dat"

07-28    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file

07-14    / S. Turner /
  removed GENERIC_VALUES option

6-11-91     / S. Turner /  
  Release 2.1 created

+--------------------------------------------------------------------+
| waves_device_SN54xx08.vhd                                           |
+--------------------------------------------------------------------+
Version 2.1 updates

08-06-91    / M. Meier /
  changed POWER to VCC-GND 

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file

6-11-91     / S. Turner /  
  Release 2.1 created

+--------------------------------------------------------------------+
| wgenerator_SN54xx08.vhd                                            |
+--------------------------------------------------------------------+
Version 2.1 updates

08-12-91    / M. Meier /
  changed library WORK to library SN54xx08

08-09-91    / M. Meier /
  replaced tabs with 4 spaces

08-06-91    / M. Meier /
  removed POWER from vectors

07-30-91    / M. Meier /
  changed 'D' to '-'

07-28-91    / S. Turner /
  moved entity-declarations & architecture-bodies into 1 file

07-15-91    / M. Meier /
  corrected test vectors

07-12-91    / M. Meier /
  added new timing vectors

6-11-91     / S. Turner /  
  Release 2.1 created









