Votrax Type N' Talk Memory Map
==============================


Overview
--------

Address decoding in 8K blocks, $8000-$FFFF is a mirror of
$0000-$7FFF.

+-------------+-------------+---------+--------+
|    RANGE    |   MIRROR    |  SIZE   | DEVICE |
+-------------+-------------+---------+--------+
| $0000-$1FFF | $8000-$9FFF |   1K    | RAM    |
+-------------+-------------+---------+--------+
| $2000-$3FFF | $A000-$BFFF | 2 bytes | ACIA   |
+-------------+-------------+---------+--------+
| $4000-$5FFF | $C000-$DFFF | 1 byte  | SC-01  |
+-------------+-------------+---------+--------+
| $6000-$7FFF | $E000-$FFFF |   4K    | ROM    |
+-------------+-------------+---------+--------+


RAM Map
-------

+-------------+-----------+-------+------------------------------------+
|   ADDRESS   |   NAME    | INIT  |            DESCRIPTION             |
+-------------+-----------+-------+------------------------------------+
| $0000-$001F | graBuf    |       | grapheme buffer                    |
+-------------+-----------+-------+------------------------------------+
| $0020-$0021 | copyEnd   |       | copy of text buffer end pointer    |
+-------------+-----------+-------+------------------------------------+
| $0022-$0023 | textPtr   |       | input text pointer                 |
+-------------+-----------+-------+------------------------------------+
| $0024-$0025 | rulePtr   |       | rule pointer                       |
+-------------+-----------+-------+------------------------------------+
| $0026-$0027 |rghtRulePtr|       | right context rule pointer         |
+-------------+-----------+-------+------------------------------------+
| $0028-$0029 | graPtr    |       | grapheme pointer                   |
+-------------+-----------+-------+------------------------------------+
| $002A-$002B | NxRGraPtr |       | next right context grapheme pointer|
+-------------+-----------+-------+------------------------------------+
| $002C-$002D | rghtGraPtr|       | right context grapheme pointer     |
+-------------+-----------+-------+------------------------------------+
| $002E-$002F | stackSav  |       | saved stack pointer                |
+-------------+-----------+-------+------------------------------------+
| $0032-$0033 | phoQStart | $0080 | phoneme queue start pointer        |
+-------------+-----------+-------+------------------------------------+
| $0034-$0035 | phoQEnd   | $0080 | phoneme queue end pointer          |
+-------------+-----------+-------+------------------------------------+
| $0038-$0039 |graMatchPtr|       | grapheme to match pointer          |
+-------------+-----------+-------+------------------------------------+
| $003C-$003D | textEnd   | $0100 | text buffer end pointer            |
+-------------+-----------+-------+------------------------------------+
|    $003E    | wordLeft  |       | remaining space in word buffer     |
+-------------+-----------+-------+------------------------------------+
|    $003F    | initSpace |       | initial space flag                 |
+-------------+-----------+-------+------------------------------------+
|    $0040    | vowelCnt  |       | vowel count                        |
+-------------+-----------+-------+------------------------------------+
|    $0041    | graLen    |       | grapheme length                    |
+-------------+-----------+-------+------------------------------------+
|    $0042    | consCnt   |       | consonant count                    |
+-------------+-----------+-------+------------------------------------+
|    $0043    | context   |       | rule context, $00 = left           |
+-------------+-----------+-------+------------------------------------+
| $0044-$0045 | tablePtr  |       | t2g / g2p pointer                  |
+-------------+-----------+-------+------------------------------------+
|    $0046    | modeEcho  |  $00  | echo mode, $00 = on                |
+-------------+-----------+-------+------------------------------------+
|    $0047    | modePsend |  $00  | psend mode, $00 = off              |
+-------------+-----------+-------+------------------------------------+
|    $0048    | modeCaps  |  $00  | caps mode, $00 = off               |
+-------------+-----------+-------+------------------------------------+
|    $0049    | unitSel   |  $00  | unit selected, $00 = unit selected |
+-------------+-----------+-------+------------------------------------+
|    $004A    | letByLet  |  $00  | letter by letter, $00 = off        |
+-------------+-----------+-------+------------------------------------+
|    $004B    | unitNum   |  $00  | unit number                        |
+-------------+-----------+-------+------------------------------------+
|    $004C    | modeTimer |  $00  | timer mode, $00 = timer on         |
+-------------+-----------+-------+------------------------------------+
|    $004D    | copyACtrl |       | copy of ACIA control register      |
+-------------+-----------+-------+------------------------------------+
| $004E-$007F |           |       | stack                              |
+-------------+-----------+-------+------------------------------------+
| $0080-$00FF |           |       | phoneme queue                      |
+-------------+-----------+-------+------------------------------------+
| $0100-$03FF | textBuf   |       | input text buffer                  |
+-------------+-----------+-------+------------------------------------+


ROM Map
-------

+-------------+-------------+-------------------------------------+
|   ADDRESS   |   NAME      |            DESCRIPTION              |
+-------------+-------------+-------------------------------------+
| $6000-$6032 | ruleSetAddr | grapheme rule set table addresses   |
+-------------+-------------+-------------------------------------+
| $6037-$6164 | ruleSetA    | grapheme rule set table - 'A'       |
+-------------+-------------+-------------------------------------+
| $6165-$61C3 | ruleSetB    | grapheme rule set table - 'B'       |
+-------------+-------------+-------------------------------------+
| $61C4-$620D | ruleSetC    | grapheme rule set table - 'C'       |
+-------------+-------------+-------------------------------------+
| $620E-$6279 | ruleSetD    | grapheme rule set table - 'D'       |
+-------------+-------------+-------------------------------------+
| $627A-$6330 | ruleSetE    | grapheme rule set table - 'E'       |
+-------------+-------------+-------------------------------------+
| $6331-$635B | ruleSetF    | grapheme rule set table - 'F'       |
+-------------+-------------+-------------------------------------+
| $635C-$639F | ruleSetG    | grapheme rule set table - 'G'       |
+-------------+-------------+-------------------------------------+
| $63A0-$63F4 | ruleSetH    | grapheme rule set table - 'H'       |
+-------------+-------------+-------------------------------------+
| $63F5-$64B4 | ruleSetI    | grapheme rule set table - 'I'       |
+-------------+-------------+-------------------------------------+
| $64B5-$64C0 | ruleSetJ    | grapheme rule set table - 'J'       |
+-------------+-------------+-------------------------------------+
| $64C1-$64CE | ruleSetK    | grapheme rule set table - 'K'       |
+-------------+-------------+-------------------------------------+
| $64CF-$64F8 | ruleSetL    | grapheme rule set table - 'L'       |
+-------------+-------------+-------------------------------------+
| $64F9-$6509 | ruleSetM    | grapheme rule set table - 'M'       |
+-------------+-------------+-------------------------------------+
| $650A-$6547 | ruleSetN    | grapheme rule set table - 'N'       |
+-------------+-------------+-------------------------------------+
| $6548-$6680 | ruleSetO    | grapheme rule set table - 'O'       |
+-------------+-------------+-------------------------------------+
| $6681-$66A2 | ruleSetP    | grapheme rule set table - 'P'       |
+-------------+-------------+-------------------------------------+
| $66A3-$66BF | ruleSetQ    | grapheme rule set table - 'Q'       |
+-------------+-------------+-------------------------------------+
| $66C0-$66D0 | ruleSetR    | grapheme rule set table - 'R'       |
+-------------+-------------+-------------------------------------+
| $66D1-$676A | ruleSetS    | grapheme rule set table - 'S'       |
+-------------+-------------+-------------------------------------+
| $676B-$6826 | ruleSetT    | grapheme rule set table - 'T'       |
+-------------+-------------+-------------------------------------+
| $6827-$68A1 | ruleSetU    | grapheme rule set table - 'U'       |
+-------------+-------------+-------------------------------------+
| $68A2-$68B8 | ruleSetV    | grapheme rule set table - 'V'       |
+-------------+-------------+-------------------------------------+
| $68B9-$691E | ruleSetW    | grapheme rule set table - 'W'       |
+-------------+-------------+-------------------------------------+
| $691F-$692A | ruleSetX    | grapheme rule set table - 'X'       |
+-------------+-------------+-------------------------------------+
| $692B-$6980 | ruleSetY    | grapheme rule set table - 'Y'       |
+-------------+-------------+-------------------------------------+
| $6981-$6989 | ruleSetZ    | grapheme rule set table - 'Z'       |
+-------------+-------------+-------------------------------------+
| $698A-$69FD | ruleSetSym  | grapheme rule set table - non-letter|
+-------------+-------------+-------------------------------------+
| $6A00-$6A1A | txt2grTable | text to grapheme table              |
+-------------+-------------+-------------------------------------+


ACIA Registers
--------------

+-------+-------+-------------+
|ADDRESS|  DIR. | DESCRIPTION |
+-------+-------+-------------+
|       | read  | status      |
| $2002 +-------+-------------+
|       | write | control     |
+-------+-------+-------------+
|       | read  | receive     |
| $2003 +-------+-------------+
|       | write | transmit    |
+-------+-------+-------------+