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  1. Apple II
  2. Technical Notes
  3. _____________________________________________________________________________
  4.                                                   Developer Technical Support
  5.  
  6.  
  7. ProDOS 8
  8. #18:    /RAM Memory Map
  9.  
  10. Revised by:    Matt Deatherage                                  November 1988
  11. Written by:    Pete McDonald                                    December 1986
  12.  
  13. This Technical Note describes the block to actual memory location mapping of 
  14. /RAM.
  15. _____________________________________________________________________________
  16.  
  17.                 Blocks     Address Range
  18.             ______________________________
  19.            |   $70-$7F   |   $E000-$EFFF  |
  20.             ______________________________
  21.            |   $68-$6F   |   $D000-$DFFF  |  (Bank 2)
  22.             ______________________________
  23.            |   $60-$67   |   $D000-$DFFF  |  (Bank 1)
  24.             ______________________________
  25.            |   $4E-$5C   |   $A200-$BFFF  |
  26.             ______________________________
  27.            |   $3D-$4C   |   $8200-$A1FF  |
  28.             ______________________________
  29.            |   $2C-$3B   |   $6200-$81FF  |
  30.             ______________________________
  31.            |   $1B-$2A   |   $4200-$61FF  |
  32.             ______________________________
  33.            |   $0A-$19   |   $2200-$41FF  |
  34.             ______________________________
  35.  
  36.             ______________________________
  37.            |   $5D-$5F   |   $1A00-$1FFF  |
  38.             ______________________________
  39.            |     $4D     |   $1800-$19FF  |
  40.             ______________________________
  41.            |     $3C     |   $1600-$17FF  |
  42.             ______________________________
  43.            |     $2B     |   $1400-$15FF  |
  44.             ______________________________
  45.            |     $1A     |   $1200-$13FF  |
  46.             ______________________________
  47.            |     $09     |   $1000-$11FF  |
  48.             ______________________________
  49.            |     $08     |   $2000-$21FF  |
  50.             ______________________________
  51.            |     $02     |   $0E00-$0FFF  |
  52.             ______________________________
  53.             
  54.             ______________________________
  55.            |     $03     |     Bitmap*    |
  56.             ______________________________
  57.  
  58. Notes:
  59. *     Synthesized.
  60. 1.    Blocks 0, 1, 4, 5, 6, and 7 do not exist.
  61. 2.    Block $7F contains the Reset, IRQ, and NMI vectors and is normally 
  62.       marked as used.
  63. 3.    The memory from $0C00 - $0DFF is a general purpose buffer used by the 
  64.       /RAM driver.
  65.  
  66.  
  67.