Addition memory map notes, edit and add to MemMap documentation.




|           |      $FE00      |         |
|           |                 |         |
| VECTORS:  |      $FE40      | RESV    | Default vectors
|           |      $FE42      | SWI3V   | when running in ROM
|           |      $FE44      | SWI2V   | Same location as SWTPC
|           |      $FE46      | FIRQV   |
|           |      $FE48      | IRQV    |
| DEFSWI:   |      $FE4A      | SWIV    |
|           |      $FE4C      | NMIV    |
|           |      $FE4E      | DMADONE |
|           |                 |         |
|           |      $FE50      | EVENTV  |
| DEFBRK:   |      $FE52      | BRKV    |
|           |      $FE54      | xxx1V   |
|           |      $FE56      | IRQ2V   |
|           |      $FE58      | CLIV    |
|           |      $FE5A      | BYTEV   |
|           |      $FE5C      | WORDV   |
|           |      $FE5E      | WRCHV   |
|           |      $FE60      | RDCHV   |
|           |      $FE62      | FILEV   |
|           |      $FE64      | ARGSV   |
|           |      $FE66      | BPUTV   |
|           |      $FE68      | BGETV   |
|           |      $FE6A      | GBPBV   |
|           |      $FE6C      | FINDV   |
|           |                 |         |
|           |      $FE6E      | PROGRAM | Program entry address
|           |      $FE70      | MEMBOT  | Bottom of user memory
|           |      $FE72      | MEMTOP  | Top of user memory
|           |      $FE74      | ADDRESS | Tube execution address
|           |      $FE76      | TRANSFER| Tube transfer address
|           |      $FE78      | LPTR    | Command line tail
|           |      $FE7A      | CTRL    | Control block address
|           |      $FE7C      | DMATYPE | TempA/Client personality
|           |      $FE7D      | FAULT   | Last error message
|           |      $FE7F      | ESCFLG  | Escape flag
|           |                 |
|           | Vector dispatch
| XRES:     |      $FE80      | JMP [RESV]    | via WORKSP+$00 |
| XSWI3:    |      $FE84      | JMP [SWI3V]   | via WORKSP+$02 |
| XSWI2:    |      $FE88      | JMP [SWI2V]   | via WORKSP+$04 |
| XFIRQ:    |      $FE8C      | JMP [FIRQV]   | via WORKSP+$06 |
| XIRQ:     |      $FE90      | JMP [IRQV]    | via WORKSP+$08 |
| XSWI:     |      $FE94      | JMP [SWIV]    | via WORKSP+$0A |
| XNMI:     |      $FE98      | JMP [NMIV]    | via WORKSP+$0C |
|           |      $FE9C      | JMP [NMIV+2]  | via WORKSP+$0E |
| XEVENT:   |      $FEA0      | JMP [EVENTV]  | via WORKSP+$10 |
| XBRK:     |      $FEA4      | JMP [BRKV]    | via WORKSP+$12 |
| Xxxx1:    |      $FEA8      | JMP [xxx1V]   | via WORKSP+$14 |
| XIRQ2:    |      $FEAC      | JMP [IRQ2V]   | via WORKSP+$16 |
| XCLI:     |      $FEB0      | JMP [CLIV]    | via WORKSP+$18 |
| XBYTE:    |      $FEB4      | JMP [BYTEV]   | via WORKSP+$1A |
| XWORD:    |      $FEB8      | JMP [WORDV]   | via WORKSP+$1C |
| XWRCH:    |      $FEBC      | JMP [WRCHV]   | via WORKSP+$1E |
| XRDCH:    |      $FEC0      | JMP [RDCHV]   | via WORKSP+$20 |
| XFILE:    |      $FEC4      | JMP [FILEV]   | via WORKSP+$22 |
| XARGS:    |      $FEC8      | JMP [ARGSV]   | via WORKSP+$24 |
| XBPut:    |      $FECC      | JMP [BPUTV]   | via WORKSP+$26 |
| XBGet:    |      $FED0      | JMP [BGETV]   | via WORKSP+$28 |
| XGBPB:    |      $FED4      | JMP [GBPBV]   | via WORKSP+$2A |
| XFIND:    |      $FED8      | JMP [FINDV]   | via WORKSP+$2C |
|           |      $FEDC      | JMP [FINDV+2] | via WORKSP+$2E |
|           |                 |               |                |
| IOADDR:   |      $FEE0      | IO ADDRS                       |
| HWVEC:    |      $FEF0      | Remapped hardware vectors      |
| Hardware vectors, remapped from $FFFx           |
|           FDB XRES      |         $FEF0         | RESERVED
|           FDB XSWI3     |         $FEF2         | SWI3
|           FDB XSWI2     |         $FEF4         | SWI2
|           FDB XFIRQ     |         $FEF6         | FIRQ
|           FDB XIRQ      |         $FEF8         | IRQ
|           FDB XSWI      |         $FEFA         | SWI1
|           FDB XNMI      |         $FEFC         | NMI
|           FDB RESET     |         $FEFE         | RESET
|-----------+---------+-------+---------+-----------+-------------------------------------
|
         ORG $FEF0
         FDB HUSER      ; FFF0 -> FF00
         FDB SWI3       ; FFF2 -> 0100
         FDB SWI2       ; FFF4 -> 0103
         FDB FIRQ       ; FFF6 -> 010F
         FDB IRQ        ; FFF8 -> 010C
         FDB SWI        ; FFFA -> 0106
         FDB NMI        ; FFFC -> 0109
         FDB RESET      ; FFFE -> STARTUP

         ORG $FF00
HUSER:   JMP [USERV]    ; FF00 -> [DFD0]
HSWI3:   JMP [SWI3V]    ; FF04 -> [DFC2]
HSWI2:   JMP [SWI2V]    ; FF08 -> [DFC4]
HFIRQ:   JMP [FIRQV]    ; FF0C -> [DFC6]
HIRQ:    JMP [IRQV]     ; FF10 -> [DFC8]
HSWI:    JMP [SWIV]     ; FF14 -> [DFCA]
HNMI:    JMP [NMIV]     ; FF18 -> [DFC0]


| IF WORKSP > ROMSTART    |       |       |       |
| Vector dispatch         |       |       |       |
| XRES:     JMP  >RTI     |       |       | $FF00 |
| XSWI3:    JMP  >RTI     |       |       | $FF03 |
| XSWI2:    JMP  >RTI     |       |       | $FF06 |
| XFIRQ:    JMP  >RTI     |       |       | $FF09 |
| XIRQ:     JMP  >RTI     |       |       | $FF0C |
| XSWI:     JMP  >ERROR   |       |       | $FF0F |
| XNMI:     JMP  >RTI     |       |       | $FF12 |
|                         |       |       |       |
| RESV:     EQU  XRES+1   |       |       | $FF01 |
| SWI3V:    EQU  XSWI3+1  |       |       | $FF04 |
| SWI2V:    EQU  XSWI2+1  |       |       | $FF07 |
| FIRQV:    EQU  XFIRQ+1  |       |       | $FF0A |
| IRQV:     EQU  XIRQ+1   |       |       | $FF0D |
| SWIV:     EQU  XSWI+1   |       |       | $FF10 |
| NMIV:     EQU  XNMI+1   |       |       | $FF13 |





+-----------+---------+-------+---------+-----------+-------------------------------------
|           |         |    CoCo/Dragon    |
|           |         | $0100 | JMP SWI3  | Default -> $FF04
|           |         | $0103 | JMP SWI2  | Default -> $FF08
|           |         | $0106 | JMP SWI   | Default -> $FF04
|           |         | $0109 | JMP NMI   | Default -> $FF18
|           |         | $010C | JMP IRQ   | Default -> $FF10
|           |         | $010F | JMP FIRQ  | Default -> $FF0C