====== CHARSET ======

[v3.1] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65]

The ''CHARSET'' command tells the display chip where to look for the character set. 

 ===== Syntax =====

  CHARSET [RAM|ROM] <value>

Changing the character set is slightly different on each platform.

====== Commodore 64 and 128 ======

The command tells the VIC-II chip to look for the character set at ''<value> * $800'', relative to selected the VIC bank (that is, 0 by default). The ''RAM'' or ''ROM'' parameter is ignored. The VIC-II chip will always see the ROM when <value> is set to 2 or 3. The following example list all possible setups in Bank 0.

  CHARSET 0 ' chars at $0000
  CHARSET 1 ' chars at $0800
  CHARSET 2 ' uppercase/graphic chars in ROM
  CHARSET 3 ' lowercase/uppercase chars in ROM
  CHARSET 4 ' chars at $2000
  CHARSET 5 ' chars at $2800
  CHARSET 6 ' chars at $3000
  CHARSET 7 ' chars at $3800

====== Commodore VIC-20 ======

The address is calculated as ''<value> * $0400''. The VIC chip can either see ROM or RAM. It can't see the expansion RAM, therefore some settings make no sense. You basically have the following (more or less useful) options:

  CHARSET ROM 0 ' uppercase with full graphic chars
  CHARSET ROM 1 ' reversed uppercase and graphic chars
  CHARSET ROM 2 ' lowercase/uppercase chars with some graphics
  CHARSET ROM 3 ' reversed lowercase/uppercase chars with some graphics
  CHARSET RAM 0 ' chars in RAM at $0000
  CHARSET RAM 4 ' chars in RAM at $1000
  CHARSET RAM 5 ' chars in RAM at $1400
  CHARSET RAM 6 ' chars in RAM at $1800
  CHARSET RAM 7 ' chars in RAM at $1C00

====== Commodore 16 and Plus/4 ======

The address is calculated as ''<value> * $0400''. The TED chip can basically see all RAM and ROM, so you have 128 possible settings here as <value> can range from 0 to 63 and both ''RAM'' and ''ROM'' settings work. 

====== Commander X16 ======

The [x16] supports the following modes:

  ' Uploads the character set found 
  ' at $2000 from RAM to VRAM and uses it
  CHARSET RAM $2000
  ' Sets ISO charset
  CHARSET ROM 1
  ' Sets PET upper/graph charset
  CHARSET ROM 2
  ' Sets PET lower/upper charset
  CHARSET ROM 3

====== MEGA65 ======

On the [m65], the location of the character generator data can also be set with byte-level precision. The ''CHARAT'' command accepts a LONG integer as its parameter which allows the placement of character data anywhere in the first 16MB of RAM. The ''RAM'' or ''ROM'' parameter is ignored. 

  ' Relocates character set to $040000
  CHARSET $40000