Single-Byte Input Method

The Single-Byte Input Method (SIM) is the standard that supports most of the locales. It is a mapping function that supports simple composing defined on workstation keyboards associated with single-byte locales.

SIM supports any keyboard, code set, and language that the keycomp command can describe. You can customize SIM using imkeymaps. The coded strings returned by the input method depend on the imkeymap.

Most single-byte locales share one SIM. The SIM features are:

• Supports 101-key and 102-key keyboard mapping.
• Supports Alt-Numpad composing.

  When you press the Alt key, the input method composes a character by using the next three numeric keys pressed. The three numeric keys represent the decimal encoding of the character. For example, entering the sequence XK_0, XK_9, XK_7 maps to the character a (097).

• Supports the Num-Lock state for the numeric keypad.
• Supports diacritical composing.

  The e-umlaut key is an example of diacritical composing. To compose e-umlaut, the user presses the appropriate diacritical key (umlaut) followed by an alphabetic key (e). The specific set of diacritical keys in use depend on the locale and keyboard definition. When a space follows a diacritical key, the diacritical character represented by the key is returned if it is in the locale's code set.

• Does not require callback functions.
• Located in the /usr/lib/nls/loc/sbcs.im file. Most of the other localized input methods are aliases to this file.
• Keymaps:

  cs_CZ.ISO8859-2.imkeymap
  da_DK.ISO8859-1.imkeymap	Da_DK.IBM-850.imkeymap
  de_CH.ISO8859-1.imkeymap	De_CH.IBM-850.imkeymap
  de_DE.ISO8859-1.imkeymap	De_DE.IBM-850.imkeymap
  en_GB.ISO8859-1.imkeymap	En_GB.IBM-850.imkeymap
  en_GB.ISO8859-1@alt.imkeymap	En_GB.IBM-850@alt.imkeymap
  en_US.ISO8859-1.imkeymap	En_US.IBM-850.imkeymap
  es_ES.ISO8859-1.imkeymap	Es_ES.IBM-850.imkeymap
  Et_EE.IBM-922 - imkeymap
  pl_PL.ISO8859-2@alt.imkeymap
  sq_AL.ISO8859-1.imkeymap
  fi_FI.ISO8859-1.imkeymap	Fi_FI.IBM-850.imkeymap
  fi_FI.ISO8859-1@alt.imkeymap	Fi_FI.IBM-850@alt.imkeymap
  fr_BE.ISO8859-1.imkeymap	Fr_BE.IBM-850.imkeymap
  fr_CA.ISO8859-1.imkeymap	Fr_CA.IBM-850.imkeymap
  fr_CH.ISO8859-1.imkeymap	Fr_CH.IBM-850.imkeymap
  fr_FR.ISO8859-1.imkeymap	Fr_FR.IBM-850.imkeymap
  fr_FR.ISO8859-1@alt.imkeymap	Fr_FR.IBM-850@alt.imkeymap
  hr_HR.ISO8859-2.imkeymap
  hu_HU.ISO8859-2.imkeymap
  is_IS.ISO8859-1.imkeymap	Is_IS.IBM-850.imkeymap
  it_IT.ISO8859-1.imkeymap	It_IT.IBM-850.imkeymap
  it_IT.ISO8859-1@alt.imkeymap	It_IT.IBM-850@alt.imkeymap
  nl_BE.ISO8859-1.imkeymap	Nl_BE.IBM-850.imkeymap
  nl_NL.ISO8859-1.imkeymap	Nl_NL.IBM-850.imkeymap
  no_NO.ISO8859-1.imkeymap	No_NO.IBM-850.imkeymap
  pl_PL.ISO8859-2.imkeymap
  pt_BR.ISO8859-1.imkeymap
  pt_PT.ISO8859-1.imkeymap	Pt_PT.IBM-850.imkeymap
  ro_RO.ISO8859-2.imkeymap
  sh_SP.ISO8859-2.imkeymap
  sl_SI.ISO8859-2.imkeymap
  sk_SK.ISO8859-2.imkeymap
  sv_SE.ISO8859-1.imkeymap	Sv_SE.IBM-850.imkeymap
  sv_SE.ISO8859-1@alt.imkeymap	Sv_SE.IBM-850@alt.imkeymap

  tr_TR.ISO8859-1.imkeymap

• Reserved keysyms:

  XK_dead_acute	0x180000b4
  XK_dead_grave	0x18000060
  XK_dead_circumflex	0x1800005e
  XK_dead_diaeresis	0x180000a8
  XK_dead_tilde	0x1800007e
  XK_dead_caron	0x180001b7
  XK_dead_breve	0x180001a2
  XK_dead_doubleacute	0x180001bd
  XK_dead_degree	0x180000b0
  XK_dead_abovedot	0x180001ff
  XK_dead_macron	0x180000af
  XK_dead_cedilla	0x180000b8
  XK_dead_ogonek	0x180001b2
  XK_dead_accentdieresis	0x180007ae

  The preceding keysyms are unique to this input method and are described in the /usr/include/X11/aix_keysym.h file.
• Modifiers:

  ShiftMask	0x01
  LockMask	0x02
  ControlMask	0x04
  Mod1Mask (Left-Alt)	0x08
  Mod2Mask (Right-Alt)	0x10
  Mod5Mask (Num Lock)	0x80