vic20 graphics info
-------------------
2008-11-22 Daniel Kahlin / tlr

Visible area measured on a CM8833 with somewhat arbitrary
adjustment.  This is a measurement of the normal text area
to be used for aspect ratio calculations.

MOS 6561E    (4881)  VIC20 PAL
MOS 6561-101 (3538)  VIC20CR PAL

  <----------23.4 cm--------->
  +--------------------------+ ^
  |    ^                     | |
  |<---|---22 chars--------->| |
  |    |                     | |
  |    |                     | |
  |    |                     | |
  |  23 chars                | 14 cm
  |    |                     | |
  |    |                     | |
  |    v                     | |
  +--------------------------+ v

MOS 6569 C64 PAL (for comparison)

  <-----------24 cm---------->
  +--------------------------+ ^
  |    ^                     | |
  |<---|---40 chars--------->| |
  |    |                     | |
  |    |                     | |
  |    |                     | |
  |  25 chars                | 15.2 cm
  |    |                     | |
  |    |                     | |
  |    v                     | |
  +--------------------------+ v


COLORS (from VICE v2.0.8dev)
----------------------------

I confirmed the luminances of these visually on my vic20 (non-cr).
MOS 6561E    (4881)  VIC20 PAL

metal-rox-mk3:palette$ sort lum.txt
    {   0.0f, ANGLE_ORN, -0, "Black"       }  0
    {  47.0f, ANGLE_BLU,  1, "Blue"        }  6
    {  51.0f, ANGLE_RED,  1, "Red"         }  2
    {  75.0f, ANGLE_GRN, -1, "Purple"      }  4
    {  85.0f, ANGLE_ORN, -1, "Orange"      }  8
    { 129.0f, ANGLE_BLU,  1, "Light Blue"  }  e
    { 129.0f, ANGLE_GRN,  1, "Green"       }  5
    { 144.0f, ANGLE_RED,  1, "Pink"        }  a
    { 157.0f, ANGLE_RED, -1, "Cyan"        }  3
    { 158.0f, ANGLE_GRN, -1, "Light Purple"}  c
    { 161.0f, ANGLE_BRN,  1, "Light Orange"}  9
    { 183.0f, ANGLE_BLU, -1, "Yellow"      }  7
    { 191.0f, ANGLE_GRN,  1, "Light Green" }  d
    { 208.0f, ANGLE_RED, -1, "Light Cyan"  }  b
    { 234.0f, ANGLE_BLU, -1, "Light Yellow"}  f
    { 256.0f, ANGLE_BRN,  0, "White"       }  1
metal-rox-mk3:palette$

