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Text File  |  1992-08-18  |  7.4 KB  |  90 lines
  1. (c)  Copyright 1992 Commodore-Amiga, Inc.   All rights reserved.
  2. The information contained herein is subject to change without notice,
  3. and is provided "as is" without warranty of any kind, either expressed
  4. or implied.  The entire risk as to the use of this information is
  5. assumed by the user.
  6.  
  7.  
  8. Memory Limits for Various CDTV Configurations
  9.  
  10. by Adam Levin-Delson
  11.  
  12.  
  13. RAM space is at a premium in the CDTV, so for the developer who is
  14. creating CDTV titles, it is important to know what the limits of
  15. system memory are.  This is especially true for developers who want
  16. their titles to work on a variety of CDTV/A500 configurations.  To
  17. help assist developers in making titles work on the maximum number of
  18. configurations, the following chart shows a variety of hardware
  19. configurations capable of playing CDTV discs.
  20.  
  21. For comparison purposes, all machines were allowed to boot far enough
  22. to open the Workbench screen (in the default size) and a CLI/Shell
  23. window.  This represents a reasonable starting point for developers
  24. to estimate if their application will fit into a CDTV's memory (To
  25. properly ascertain the amount of free memory in a particular
  26. CDTV/A500(+) at run time, use the Exec library's AvailMem()
  27. function).  These results are not guaranteed for any particular
  28. configuration, they can and will change depending upon many
  29. variables, including additional hardware, overscan or interlaced
  30. screens, etc.  Use this information only as a guideline.  Do not
  31. assume that these result will remain constant in future releases of
  32. the OS.
  33.  
  34. WARNING: A title that consumes too much memory on a current
  35. configuration may not work in the future if a new release of the OS
  36. consumes even a little more memory.
  37.  
  38. Important note about Workbench V1.3 and V 2.0.  Under 1.3, the
  39. Workbench screen and initial CLI always open upon booting with an
  40. AmigaDOS disc.  Under 2.0, the system only opens the Workbench screen
  41. when necessary,  and only opens an initial CLI if the
  42. Startup-sequence attempts to output text.  The C:Avail program first
  43. calculates the amount of free RAM and then prints out the results.
  44. Under 2.0, this means the amount of memory printed by Avail would
  45. differ from the amount of memory actually free by the amount needed
  46. to create the Workbench screen and initial CLI.
  47.  
  48.  
  49.  
  50. Machine   NTSC/PAL  1.3/2.0  Peripherals  *  Available   In-Use   Maximum   Largest
  51.  
  52. CDTV        NTSC      1.3    internal HD  c   799448     240704   1040152   797312
  53.                              floppy
  54. CDTV        NTSC      1.3    floppy       c   886688     153464   1040152   710472
  55. CDTV        NTSC      2.0    floppy       c   840616     206936   1047552   689200
  56. CDTV        NTSC      1.3    SCSI card    c   881248     158904   1040152   704904
  57. CDTV        NTSC      1.3    floppy       c   878824     161328   1040152   878624
  58. CDTV        PAL       2.0    floppy       c   807528     239992   1047520   792880
  59. CDTV        PAL       2.0    none         c   828784     218768   1047552   824736
  60. CDTV        PAL       1.3    floppy       c   877936     162216   1040152   710552
  61. CDTV        PAL       1.3    internal HD  c   790488     249664   1040152   788352
  62.                              floppy
  63. A500/570    NTSC      1.3    internal FD  c   466256     56976    523232    466208
  64.                                           f   412728     104160   516888    412552
  65.                                           t   878984     161136   1040120   466208
  66. A500/570    PAL       1.3    internal FD  c   457296     65936    523232    457248
  67.                                           f   412704     104184   516888    412064
  68.                                           t   870000     170120   1040120   457248
  69. A500+/570   PAL       2.0    internal FD  c   809744     237776   1047520   795144
  70. A500+       PAL       2.0    internal FD  c   839688     207864   1047552   838648
  71. CDTV        NTSC      1.3    floppy       c   886688     153464   1040152   710472
  72. CDTV        NTSC      2.0    floppy       c   840616     206936   1047552   689200
  73. CDTV        NTSC      1.3    SCSI card    c   881248     158904   1040152   704904
  74. CDTV        NTSC      1.3    floppy       c   878824     161328   1040152   878624
  75. CDTV        PAL       2.0    floppy       c   807528     239992   1047520   792880
  76. CDTV        PAL       2.0    none         c   828784     218768   1047552   824736
  77. CDTV        PAL       1.3    floppy       c   877936     162216   1040152   710552
  78. A500/570    NTSC      1.3    internal     c   466256     56976    523232    466208
  79.                              floppy       f   412728     104160   516888    412552                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          t      878984       161136    1040120      466208
  80. A500/570    PAL       1.3    internal     c   457296     65936    523232    457248
  81.                              floppy       f   412704     104184   516888    412064                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           t      870000       170120    1040120      457248
  82. A500+/570   PAL       2.0    internal     c   809744     237776   1047520   795144
  83.                              floppy
  84. A500+       PAL       2.0    internal     c   839688     207864   1047552   838648                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    floppy
  85.                              floppy
  86.  
  87. * c=chip; f=fast; t=total
  88. * c=chip; f=fast; t=total
  89. FD = Floppy Drive; HD = Hard Drive
  90.