-- This is Package STANDARD as defined in the VHDL 1992 Language Reference Manual.

--

-- NOTE: VCOM and VSIM will not work properly if these declarations

-- are modified.

 

-- Version information: @(#)standard.vhd

 

package standard is

type boolean is (false,true);

type bit is ('0', '1');

type character is (

nul, soh, stx, etx, eot, enq, ack, bel,

bs, ht, lf, vt, ff, cr, so, si,

dle, dc1, dc2, dc3, dc4, nak, syn, etb,

can, em, sub, esc, fsp, gsp, rsp, usp,

 

' ', '!', '"', '#', '$', '%', '&', ''',

'(', ')', '*', '+', ',', '-', '.', '/',

'0', '1', '2', '3', '4', '5', '6', '7',

'8', '9', ':', ';', '<', '=', '>', '?',

 

'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',

'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',

'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',

'X', 'Y', 'Z', '[', '\', ']', '^', '_',

 

'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',

'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',

'p', 'q', 'r', 's', 't', 'u', 'v', 'w',

'x', 'y', 'z', '{', '|', '}', '~', del,

 

c128, c129, c130, c131, c132, c133, c134, c135,

c136, c137, c138, c139, c140, c141, c142, c143,

c144, c145, c146, c147, c148, c149, c150, c151,

c152, c153, c154, c155, c156, c157, c158, c159,

 

-- the character code for 160 is there (NBSP),

-- but prints as no char

 

' ', '', '', '', '¤', '', '', '',

'', '', 'ª', '', '', '', '', '',

'', '', '', '', '', '', '', '',

'', '', 'º', '', '', '', '', '',

 

'', '', '', '', '', '', '', '',

'', '', '', '', '', '', '', '',

'', '', '', '', '', '', '', '',

'', 'Ù', 'Ú', 'Û', 'Ü', 'Ý', 'Þ', 'ß',

 

'', '', '', '', '', '', '', '',

'', '', '', '', '', '', '', '',

'', '', '', '', '', '', '', '',

'', '', '', 'û', 'ü', 'ý', '', 'ÿ' );

 

type severity_level is (note, warning, error, failure);

type integer is range -2147483648 to 2147483647;

type real is range -1.0E308 to 1.0E308;

type time is range -2147483647 to 2147483647

units

fs;

ps = 1000 fs;

ns = 1000 ps;

us = 1000 ns;

ms = 1000 us;

sec = 1000 ms;

min = 60 sec;

hr = 60 min;

end units;

subtype delay_length is time range 0 fs to time'high;

impure function now return delay_length;

subtype natural is integer range 0 to integer'high;

subtype positive is integer range 1 to integer'high;

type string is array (positive range <>) of character;

type bit_vector is array (natural range <>) of bit;

type file_open_kind is (

read_mode,

write_mode,

append_mode);

type file_open_status is (

open_ok,

status_error,

name_error,

mode_error);

attribute foreign : string;

end standard;