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Text File  |  1998-10-24  |  4KB  |  72 lines
  1. DESKTOP ⑧x1k1
  2.                                 חללללללללללללללללל†
  3.                                 ´     MEMORY      ´
  4.                                 ´ bit assignments ´
  5.                                 זללללללללללללללללל¶
  6.  
  7.                                  Atari Memory Manager Unit
  8.                 םגגגגגגגגגגגגגגג™
  9.                 ø CONFIGuration ø  b3-b2=[b1-b0]=bank 0
  10.                 ø               ø  b1-b0=[b1-b0]=bank 1
  11.                 ø               ø                00:  64 Kbit RAM
  12.                 ø               ø                01: 256 Kbit RAM
  13.                 ø               ø                10:1024 Kbit RAM
  14.                 ijגגגגגגגגגגגגגגגך
  15.  
  16.                                  Random Access Memory
  17.                    םגגגגגגגגגגגג™
  18.                    ø $2-3       ø       =ROM version (in BCD)
  19.                    ø $4-7       ø       =reset PC ($FF|(5)|(6)|$00=ROM address)
  20.                    ø $8-memsize ø       =RAM
  21.                    ijגגגגגגגגגגגגך
  22.  
  23.                                  Reset Programs
  24.               בגגגגגגגגגגגגגגגגגœ
  25.               ø MEMSIZE-512*n   ø     if=$12123456
  26.               ø   ...        +4 ø and if=MEMSIZE-512*n
  27.               ø                 ø and if the checksum of the 512 bytes=$5678
  28.               ø   ...    +8-... ø       =reset program
  29.               ijגגגגגגגגגגגגגגגגגך
  30.  
  31.                                  Read Only Memory PACKage
  32.                 םגגגגגגגגגגגגגגג™
  33.                 ø $FFFA0000.L   ø       =$ABCDEF42
  34.                 ø $FFFA0004-... ø       =first program
  35.                 ø               ø         .L=next program address (0:end)
  36.                 ø               ø         .L=init
  37.                 ø               ø               b31=Tos Take Parameters
  38.                 ø               ø               b30=TOS
  39.                 ø               ø               b29=accessory
  40.                 ø               ø               b25=TOS init
  41.                 ø               ø               b24=low level init
  42.                 ø               ø            b23-b0=init address
  43.                 ø               ø         .L=run address
  44.                 ø               ø         .W=time
  45.                 ø               ø         .W=date
  46.                 ø               ø         .L=program size
  47.                 ø               ø        .Bs=program name (+0)
  48.                 ijגגגגגגגגגגגגגגגך
  49.  
  50.                                  Atari Read Only Memory
  51.                   םגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגג™
  52.                   ø                     DESKTOP                    ø
  53.                   ø םגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגג™ ø
  54.                   ø ø                     AES                    ø ø
  55.                   ø ø םגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגג™ ø ø
  56.                   ø ø ø                   VDI                  ø ø ø
  57.                   ø ø ø םגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגג™ ø ø ø
  58.                   ø ø ø ø                 TOS                ø ø ø ø
  59.                   ø ø ø ø םגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגג™ ø ø ø ø
  60.                   ø ø ø ø ø              BIOS              ø ø ø ø ø
  61.                   ø ø ø ø ø םגגגגגגגגגגגגגגגגגגגגגגגגגגגג™ ø ø ø ø ø
  62.                   ø ø ø ø ø ø           XBIOS            ø ø ø ø ø ø
  63.                   ø ø ø ø ø ø םגגגגגגגגגגגגגגגגגגגגגגגג™ ø ø ø ø ø ø
  64.                   ø ø ø ø ø ø ø     USED EXCEPTIONS    ø ø ø ø ø ø ø
  65.                   ø ø ø ø ø ø ø םגגגגגגגגגגגגגגגגגגגג™ ø ø ø ø ø ø ø
  66.                   ø ø ø ø ø ø ø ø  CRASH EXCEPTIONS  ø ø ø ø ø ø ø ø
  67.                   ø ø ø ø ø ø ø ø םגגגגגגגגגגגגגגגג™ ø ø ø ø ø ø ø ø
  68.                   ø ø ø ø ø ø ø ø ø   WARM RESET   ø ø ø ø ø ø ø ø ø
  69.                   ø ø ø ø ø ø ø ø ø םגגגגגגגגגגגג™ ø ø ø ø ø ø ø ø ø
  70.                   ø ø ø ø ø ø ø ø ø ø COLD RESET ø ø ø ø ø ø ø ø ø ø
  71.                   ijגIJגIJגIJגIJגIJגIJגIJגIJגIJגגגגגגגגגגגגIJגIJגIJגIJגIJגIJגIJגIJגIJגך
  72.