DESKTOP x1k12
                                ͻ
                                     MEMORY      
                                 bit assignments 
                                ͼ

                                 Atari Memory Manager Unit
                Ŀ
                 CONFIGuration   b3-b2=[b1-b0]=bank 0
                                 b1-b0=[b1-b0]=bank 1
                                               00:  64 Kbit RAM
                                               01: 256 Kbit RAM
                                               10:1024 Kbit RAM
                

                                 Random Access Memory
                   Ŀ
                    $2-3              =ROM version (in BCD)
                    $4-7              =reset PC ($FF|(5)|(6)|$00=ROM address)
                    $8-memsize        =RAM
                   

                                 Reset Programs
              Ĵ
               MEMSIZE-512*n        if=$12123456
                 ...        +4  and if=MEMSIZE-512*n
                                and if the checksum of the 512 bytes=$5678
                 ...    +8-...        =reset program
              

                                 Read Only Memory PACKage
                Ŀ
                 $FFFA0000.L          =$ABCDEF42
                 $FFFA0004-...        =first program
                                        .L=next program address (0:end)
                                        .L=init
                                              b31=Tos Take Parameters
                                              b30=TOS
                                              b29=accessory
                                              b25=TOS init
                                              b24=low level init
                                           b23-b0=init address
                                        .L=run address
                                        .W=time
                                        .W=date
                                        .L=program size
                                       .Bs=program name (+0)
                

                                 Atari Read Only Memory
                  Ŀ
                                       DESKTOP                    
                   Ŀ 
                                        AES                     
                    Ŀ  
                                       VDI                    
                     Ŀ   
                                      TOS                   
                      Ŀ    
                                    BIOS                  
                       Ŀ     
                                  XBIOS                 
                        Ŀ      
                             USED EXCEPTIONS          
                         Ŀ       
                           CRASH EXCEPTIONS         
                          Ŀ        
                             WARM RESET           
                           Ŀ         
                            COLD RESET          
                  
