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********************* IBIS GOLDEN PARSER BUG REPORT FORM *********************
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INSTRUCTIONS
 
To report a bug in the IBIS golden parser.  Please fill out the top part
of the following form and send the complete form to ibischk-bug@eda.org.
 
A list of reported bugs will be maintained on vhdl.org.
 
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PARSER VERSION NUMBER: 5.1.4
 
PLATFORM (SPARC, HP700, PC, etc.): All

OS AND VERSION: All

REPORTED BY:    Michael Mirmak, Intel Corp.
 
DATE:   Feb. 7, 2014
 
DESCRIPTION OF BUG:
 
The 6.0 specification strongly implies that only input-only and output-only 
[Model]s are currently permitted to be associated with AMI data using the
[Algorithmic Model] keyword pair.  However, there is no explicit prohibition on 
using any model type with [Algorithmic Model] except Terminator, Series, and 
Series_Switch.

The parser correctly generates no errors if an [Algorithmic Model] keyword
pair is associated with a model of Model_type I/O.  However, the association of a 
I/O buffer with either a TX or RX AMI file is ambiguous: there is no way to 
communicate to the calling EDA tool, either in traditional IBIS
or using AMI Reserved_parameters, the directionality state of the buffer at
any one time. 

Ideally, a warning, caution, or note would be generated for buffers of
Model_type I/O, 3-state, I/O_open_drain, I/O_open_sink, I/O_open_source, 
I/O_ECL, or 3-state_ECL.  

This is likely to be seen as "not a bug" as the specification is ambiguous
on this point.  This bug can serve as documentation of the need for a 
clarification to a future revision of IBIS; alternately, a Reserved parameter
indicating the direction of current operation could be added to enable
I/O AMI models.

INSERT IBIS FILE DEMONSTRATING THE BUG:
(note that insertion is no longer appropriate if DLL and AMI files are required
for succuessful parsing!)
 
This IBIS file shows no errors or warnings.

|**************************************************************************
|
[IBIS Ver] 5.1
|
[Disclaimer] 
This model is for illustration purposes only.
|
|***************************************************************************
|
[File Name]     bug150.ibs
[File Rev]      1.0
[Date]          10/25/2013
[Source]        Developed by: Example Corporation
[Copyright]     Public domain
|
|**************************************************************************
|
[Component]     Example
[Manufacturer]  Example Corporation

[Package]
|               typ             min             max
R_pkg           0.000m        0.000m          0.000m
L_pkg           0.000nH       0.000nH         0.000nH
C_pkg           0.000pF       0.000pF         0.000pF
|
|**************************************************************************
|
[Pin]    signal_name  model_name   R_pin L_pin  C_pin
A1       example      chip_io_buffer
|
|***************************************************************************
|
[Model] chip_io_buffer
Model_type I/O
Polarity        Non-Inverting
|
Vref = 0.5
Rref = 50
Vmeas = 0.5
Cref = 0
Vinh = 2.0
Vinl = 0.8
|            typ        min        max
C_comp      1.05p      1.05p      1.05p
|
[Temperature Range] 50         50         50
[Voltage Range]     0.935      0.935      0.935
|
|***************************************************************************
|
[Algorithmic Model]
Executable Windoze_Basik_32 bug150.dll bug150.ami
[End Algorithmic Model]
|
|***************************************************************************
|

[Pulldown]
-2.50             -0.050     -0.0556      -0.04545      
 0.00              0.000      0.0000       0.00000 
 2.50              0.050      0.0556       0.04545          
|
[Pullup]
-2.50              0.050      0.0556       0.04545        
 0.00              0.000      0.0000       0.00000 
 2.50             -0.050     -0.0556      -0.04545        

|
|*******************************************************************************
|
[Ramp]
R_load = 50.00Ohm
|                 typ        min          max
|
dV/dt_r        0.7/10ps     0.7/10ps     0.7/10ps
dV/dt_f        0.7/10ps     0.7/10ps     0.7/10ps
|
[END]

-----------
bug150.ami
-----------

(bug150
    (Reserved_Parameters
        (AMI_Version (Usage Info) (Type String) (Value "5.1"))
        (Init_Returns_Impulse (Usage Info) (Type Boolean) (Default True) (Description "Init_Returns_Impulse False"))
        (GetWave_Exists (Usage Info) (Type Boolean) (Default False) (Description "GetWave_Exists False"))
        (Max_Init_Aggressors (Usage Info) (Type Integer) (Default 26) (Description "Max_Init_Aggressors 50"))
    )
)

----------
bug150.dll
----------

Dummy File




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******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
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BUG NUMBER:  150 

SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT]   ENHANCEMENT
 
PRIORITY: [HIGH, MEDIUM, LOW]                                LOW        

STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG]              NOT A BUG      
 
FIXED VERSION:
 
FIXED DATE:

NOTES ON BUG FIX: 
Classified at the February 21, 2014 IBIS Teleconference Meeting.
Will be discussed with respect to a BIRD proposal and IBIS-AMI Flow enhancement.

The Status was changed to Not A Bug, as reported at the April 4, 2014 IBIS
Teleconference Meeting.

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