| adress | hexaddress | NAME | description | OS |
|---|
| 0,1 | $0000,$0001 | LINZBS | | both |
| 2,3 | $0002,$0003 | CASINI | | both |
| 4,5 | $0004,$0005 | RAMLO | | both |
| 6 | $0006 | TRAMSZ | | both |
| 7 | $0007 | TSTDAT | | |
| 8 | $0008 | WARMST | | |
| 9 | $0009 | BOOT? | | |
| 10,11 | $000A,$000B | DOSVEC | | |
| 12,13 | $000C,$000D | DOSINI | | |
| 14,15 | $000E,$000F | APPMHI | | |
| 16 | $0010 | POKMSK | | |
| 17 | $0011 | BRKKEY | | |
| 18,19,20 | $0012,$0013,$0014 | RTCLOK | | |
| 21,22 | $0015,$0016 | BUFADR | | |
| 23 | $0017 | ICCOMT | | |
| 24,25 | $0018,$0019 | DSKFMS | | |
| 26,27 | $001A,$001B | DSKUTL | | |
| 28 | $001C | PTIMOT | | |
| 29 | $001D | PBPNT | | |
| 30 | $001E | PBUFSZT | | |
| 31 | $001F | PTEMP | | |
| 32 | $0020 | ICHIDZ | | |
| 33 | $0021 | PTIMOT | | |
| 34 | $0022 | PTIMOT | | |
| 35 | $0023 | PTIMOT | | |
| 36,37 | $0024,$0025 | ICBALZ,ICBAHZ | | |
| 38,39 | $0026,$0027 | ICPTLZ,ICPTHZ | | |
| 40,41 | $0028,$0029 | ICBLLZ,ICBLHZ | | |
| 42 | $002A | ICAX1Z | | |
| 43 | $002B | ICAX2Z | | |
| 44,45 | $002C,$002D | ICAX3Z,ICAX4Z | | |
| 46 | $002E | ICAX5Z | | |
| 47 | $002F | ICAX6Z | | |
| 48 | $0030 | STATUS | | |
| 49 | $0031 | CHKSUM | | |
| 50,51 | $0032,$0033 | BUFRLO,BUFRHI | | |
| 52,53 | $0034,$0035 | BFENLO,BFENHI | | |
| 54 | $0036 | CRETRY | | |
| 55 | $0037 | DRETRY | | |
| 56 | $0038 | BUFRFL | | |
| 57 | $0039 | RECVDN | | |
| | | | | |
| 704 | $02C0 | PCOLR0 | Color of Player 0 and Missile 0 | both |
| 705 | $02C1 | PCOLR1 | Color of Player 1 and Missile 1 | both |
| 706 | $02C2 | PCOLR2 | Color of Player 3 and Missile 2 | both |
| 707 | $02C3 | PCOLR3 | Color of Player 3 and Missile 3 | both |
| 708 | $02C4 | COLOR0 | Color Register 0. | both |
| 709 | $02C5 | COLOR1 | | both |
| 710 | $02C6 | COLOR2 | | both |
| 711 | $02C7 | COLOR3 | | both |
| 712 | $02C8 | COLOR4 | | both |
| 732 | $02FC | HELPFG | | both |
| 736,737 | $02E0,$02E1 | RUNAD | | both |
| 762 | $02FA | CHAR | | both |
| 763 | $02FB | ATACHR | | both |
| 764 | $02FC | CH | | both |
| 765 | $02FD | FILDAT | | both |
| 766 | $02FE | DSPFLG | | both |
| 767 | $02FF | SSFLAG | | both |