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1.1 root 1: CTerm terminal chariteristics:
2: ------------------------------
3:
4: End of line behaviour (wrapping):
5: The cursor is moved to the first character of the next line
6: as soon as a character is written to the last column of the
7: current line, not on the next character. A tab will wrap
8: to the next line only if the current cursor position is the
9: last character on the line.
10:
11: Control characters:
12:
1.1.1.2 ! root 13: NUL:
! 14: In doorway mode, indicates that the next character is
! 15: a literal character. The IBM CP437 character will
! 16: be displayed. This allows ESC and other control
! 17: characters to be placed on the screen.
! 18:
1.1 root 19: CR:
20: Move cursor position to column 1 of the current line
21:
22: LF:
23: Move cursor position to same column of the next row.
24: If current row is the last row, scrolls the screen up
25: and fills the new row with the current attribute.
26:
27: BS:
28: Non-destructive backspace. Moves cursor position to
29: the previous column unless the current column is the
30: first, in which case no operation is performed.
31:
32: 0x07:
33: Beep
34:
35: TAB:
36: Moves to the next tab stop. Does not overwrite any
37: characters in between. If the starting position is
38: last column, advances to next line. If starting
39: position is the last column of the last line, performs
40: a scroll, filling the new line at bottom with the
41: current attribute and moves to the first character in
42: the new line.
43:
44: Control Codes:
45: --------------
46:
47: Control codes are in the following format:
48: ESC {SPACE to '/'}{'0' (ZERO) to '~'}
49: There may be multiple characters from the {SPACE to '/'} set
50: before the terminating '0' to '~'
51:
52: Legal combinations which are not handled are silently dropped.
53:
54: ESC D (Disabled in current code)
55: Scrolls window up one line filling the bottom line with the
56: current attribute.
57: SOURCE: BANSI.TXT
58:
59: ESC M (Disabled in current code)
60: Scrolls window down one line filling the top line with the
61: current attribute
62: SOURCE: BANSI.TXT
63:
64: Control Sequences:
65: ------------------
66:
67: Control sequences start with the Control Sequence Introducer which is
68: ESC [ CSI will be used to express this from now on.
69:
70: Control sequences are in the following format:
71: CSI {'0' (ZERO) to '?'}{SPACE to '/'}{'@' to '~'}
72: There may be multiple characters from the {'0' (ZERO) to '?'}
73: and {SPACE to '/'} before the terminating {'@' to '~'} character.
74:
75: Legal combinations not handled are silently dropped.
76: Illegal combinations are displayed.
77:
78: Sequence Parameters:
79: Parameters are expressed by the {'0' (ZERO) to '?'} character set.
80: Sequences which use parameters use decimal parameters separated by
81: a ';'. The use of a ':' from the set is reserved.
82: If the parameter string begins with '<', '=', '>', or '?' then
83: this is a non-standard extension to the ANSI spec.
84:
85: Parameters will be shown as pX where X will be a decimal position
86: number. Surrounded by [] indicates the parameter is optional.
87:
88: CSI = [p1] M
89: NON-STANDARD EXTENSION.
90: Defaults: p1 = 0
91: Sets the current state of ANSI music parsing.
92: 0 - Only CSI | will introduce an ANSI music string.
93: 1 - Both CSI | and CSI N will introduce an ANSI music string.
94: 2 - CSI |, CSI N, and CSI M will all intriduce and ANSI music string.
95: In this mode, Delete Line will not be available.
96:
97: SOURCE: CTerm only.
98:
99: CSI = [ p1 [ ; p2 ] ] {
100: NON-STANDARD EXTENSION.
101: Defaults: p1 = 255 p2 = 0
102: Indicates that a font block is following.
103: p1 indicates the font slot to place the loaded font into. This must
104: be higher than the last default defined font (See CSI sp D for list
105: of predefined fonts) p2 indicates font size according to the
106: following table:
107: 0 - 8x16 font, 4096 bytes.
108: 1 - 8x14 font, 3586 bytes.
109: 2 - 8x8 font, 2048 bytes.
110:
111: SOURCE: CTerm only.
112:
113:
1.1.1.2 ! root 114: CSI [ = 255 h
! 115: NON-STANDARD EXTENSION
! 116: Enable DoorWay Mode
! 117:
! 118: SOURCE: BANSI.TXT
! 119:
! 120: CSI [ ? 25 h
! 121: NON-STANDARD EXTENSION
! 122: Display the cursor
! 123:
! 124: SOURCE: "Installing and Using the VT320 Video Terminal"
! 125:
! 126: CSI [ ? 31 h
! 127: NON-STANDARD EXTENSION
! 128: Enable alt character set
! 129:
! 130: With this mode set, the bright (1) graphic rendition selects characters
! 131: from an alternate character set.
! 132:
! 133: CSI [ ? 32 h
! 134: NON-STANDARD EXTENSION
! 135: Bright Intensity Disable
! 136:
! 137: With this mode set, the bright (1) graphic rendition does not cause
! 138: characters to be display in a bright colour
! 139:
! 140: CSI [ ? 33 h
! 141: NON-STANDARD EXTENSION
! 142: Blink to Bright Intensity Background
! 143:
! 144: With this mode set, the blink (5,6) graphic renditions cause the
! 145: background colour to be high intensity rather than causing blink
! 146:
! 147: CSI [ = 255 l
! 148: NON-STANDARD EXTENSION
! 149: Disable DoorWay Mode
! 150:
! 151: SOURCE: BANSI.TXT
! 152:
! 153: CSI [ ? 25 l
! 154: NON-STANDARD EXTENSION
! 155: Hide the cursor
! 156:
! 157: SOURCE: "Installing and Using the VT320 Video Terminal"
! 158:
! 159: CSI [ ? 31 l
! 160: NON-STANDARD EXTENSION
! 161: Disable alt character set
! 162:
! 163: Reverses CSI [ ? 31 h
! 164:
! 165: CSI [ ? 32 l
! 166: NON-STANDARD EXTENSION
! 167: Bright Intensity Enable
! 168:
! 169: Reverses CSI [ ? 32 h
! 170:
! 171: CSI [ ? 33 l
! 172: NON-STANDARD EXTENSION
! 173: Blink Normal
! 174:
! 175: Reverses CSI [ ? 33 h
! 176:
1.1 root 177: CSI [ p1 [ ; p2 ] ] * r
178: NON-STANDARD EXTENSION.
179: Set the output emulation speed.
180: If p1 or p2 are omitted, causes output speed emulation to stop
181: p1 may be empty.
182: Sequence is ignored if p1 is not empty, 0, or 1.
183: The value of p2 sets the output speed emulation as follows:
184:
185: Value Speed
186: ----- -----
187: empty, 0 Unlimited
188: 1 300
189: 2 600
190: 3 1200
191: 4 2400
192: 5 4800
193: 6 9600
194: 7 19200
195: 8 38400
196: 9 57600
197: 10 76800
198: 11 115200
199:
200: SOURCE: VT4xx Specification from http://www.vt100.net/
201:
202: CSI [ p1 ] @
203: Insert Character(s)
204: Defaults: p1 = 1
205: Moves text from the current position to the right edge p1 characters
206: to the right, with rightmost charaters going off-screen and the
207: resulting hole being filled with the current attribute.
208:
209: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
210:
211: CSI [ p1 ] A
212: Cursor Up
213: Defaults: p1 = 1
214: Moves the cursor position up p1 lines from the current position.
215: Attempting to move past the screen boundaries stops the cursor
216: at the screen boundary.
217:
218: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
219:
220: CSI [ p1 ] B
221: Cursor Down
222: Defaults: p1 = 1
223: Moves the cursor position down p1 lines from the current position.
224: Attempting to move past the screen boundaries stops the cursor
225: at the screen boundary.
226:
227: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
228:
229: CSI [ p1 ] C
230: Cursor Right
231: Defaults: p1 = 1
232: Moves the cursor position right p1 columns from the current position.
233: Attempting to move past the screen boundaries stops the cursor
234: at the screen boundary.
235:
236: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
237:
238: CSI [ p1 ] D
239: Cursor Left
240: Defaults: p1 = 1
241: Moves the cursor position left p1 columns from the current position.
242: Attempting to move past the screen boundaries stops the cursor
243: at the screen boundary.
244:
245: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
246:
247: CSI [ p1 [ ; p2 ] ] sp D
248: Font Selection
249: Defaults: p1 = 0 p2 = 0
250: "sp" indicates a single space character.
251: Sets font p1 to be the one indicated bu p2. Currently only the primary
1.1.1.2 ! root 252: font (Font zero) and secondary font (Font one) are supported. p2 must
! 253: be between 0 and 255. Not all output types support font selection. Only
! 254: X11 and SDL currently do.
1.1 root 255: Currently included fonts are:
256: 0 - Codepage 437 English
257: 1 - Codepage 1251 Cyrillic, (swiss)
258: 2 - Russian koi8-r
259: 3 - ISO-8859-2 Central European
260: 4 - ISO-8859-4 Baltic wide (VGA 9bit mapped)
261: 5 - Codepage 866 (c) Russian
262: 6 - ISO-8859-9 Turkish
263: 7 - haik8 codepage (use only with armscii8 screenmap)
264: 8 - ISO-8859-8 Hebrew
265: 9 - Ukrainian font koi8-u
266: 10 - ISO-8859-15 West European, (thin)
267: 11 - ISO-8859-4 Baltic (VGA 9bit mapped)
268: 12 - Russian koi8-r (b)
269: 13 - ISO-8859-4 Baltic wide
270: 14 - ISO-8859-5 Cyrillic
271: 15 - ARMSCII-8 Character set
272: 16 - ISO-8859-15 West European
273: 17 - Codepage 850 Multilingual Latin I, (thin)
274: 18 - Codepage 850 Multilingual Latin I
275: 19 - Codepage 885 Norwegian, (thin)
276: 20 - Codepage 1251 Cyrillic
277: 21 - ISO-8859-7 Greek
278: 22 - Russian koi8-r (c)
279: 23 - ISO-8859-4 Baltic
280: 24 - ISO-8859-1 West European
281: 25 - Codepage 866 Russian
282: 26 - Codepage 437 English, (thin)
283: 27 - Codepage 866 (b) Russian
284: 28 - Codepage 885 Norwegian
285: 29 - Ukrainian font cp866u
286: 30 - ISO-8859-1 West European, (thin)
287: 31 - Codepage 1131 Belarusian, (swiss)
1.1.1.2 ! root 288: 32 - Commodore 64 (UPPER)
! 289: 33 - Commodore 64 (Lower)
! 290: 34 - Commodore 128 (UPPER)
! 291: 35 - Commodore 128 (Lower)
! 292: 36 - Atari
! 293: 37 - P0T NOoDLE (Amiga)
! 294: 38 - mO'sOul (Amiga)
! 295: 39 - MicroKnight (Amiga)
! 296: 40 - Topaz (Amiga)
1.1 root 297: Not all fonts are supported in all modes. If a font is not supported in
298: the current mode, no action is taken.
299:
300: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
301:
302: CSI [ p1 ] E
303: Cursor Next Line
304: Defaults: p1 = 1
1.1.1.2 ! root 305: Moves the cursor to the first column of the line p1 down from the current position.
1.1 root 306: Moving past the bottom of the screen scrolls the screen up the remaining
307: number of lines filling newly added lines with the current attribute.
308:
309: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
310:
1.1.1.2 ! root 311: CSI [ p1 ] F
! 312: Cursor Preceding Line
! 313: Defaults: p1 = 1
! 314: Moves the cursor to the first column if the row p1 up from the current position.
! 315: Attempting to move past the screen boundaries stops the cursor
! 316: at the screen boundary.
! 317:
! 318: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
! 319:
! 320: CSI [ p1 ] G
! 321: Cursor Character Absolute
! 322: Defaults: p1 = 1
! 323: Movies the cursor to column p1 of the current row.
! 324:
! 325: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
! 326:
1.1 root 327: CSI [ p1 [ ; p2 ] ] H
328: CSI [ p1 [ ; p2 ] ] f
329: Cusror Position
330: Defaults: p1 = 1 p2 = 1
331: Moves the cursor to the p2th column of the p1th line.
332:
333: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
334:
335: CSI [ p1 ] J
336: Erase in Page
337: Defaults: p1 = 0
338: Erases from the current screen according to the value of p1
339: 0 - Erase from the current position to the end of the screen.
340: 1 - Erase from the current position to the start of the screen.
341: 2 - Erase entire screen. As a violation of ECMA-048, also moves
342: the cursor to position 1/1 as a number of BBS programs assume
343: this behaviour.
344: Erased characters are set to the current attribute.
345:
346: SOURCE BANSI.TXT
347:
348: CSI [ p1 ] K
349: Erase in Line
350: Defaults: p1 = 0
351: Erases from the current line according to the value pf p1
352: 0 - Erase from the current position to the end of the line.
353: 1 - Erase from the current position to the start of the line.
354: 2 - Erase entire line.
355: Erased characters are set to the current attribute.
356:
357: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
358:
359: CSI [ p1 ] L
360: Insert Line(s)
361: Defaults: p1 = 1
362: Inserts p1 lines at the current line position. The current line and
363: those after it are scrolled down and the new empty lines are filled with
364: the current attribute.
365:
366: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
367:
368: CSI [ p1 ] M
369: Delete Line(s) / "ANSI" Music
370: Defaults: p1 = 1
371: Deletes the current line and the p1 - 1 lines after it scrolling the
372: first non-deleted line up to the current line and filling the newly
373: empty lines at the end of the screen with the current attribute.
374: If "ANSI" Music is fully enabled (CSI = 2 M), performs "ANSI" music
375: instead.
376: See "ANSI" MUSIC section for more details.
377:
378: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
379: SOURCE: BANSI.TXT
380:
381: CSI N
382: "ANSI" Music / Not implemented.
383: If "ANSI" Music is set to BananaCom (CSI = 1 M) or fully enabled
384: (CSI = 2 M) performs "ANSI" muisic. See "ANSI" MUSIC section for more
385: details.
386:
387: SOURCE: BANSI.TXT
388:
389: CSI [ p1 ] P
390: Delete Character
391: Defaults: p1 = 1
392: Deletes the character at the current position by shifting all characters
393: from the current column + p1 left to the current column. Opened blanks
394: at the end of the line are filled with the current attribute.
395:
396: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
397:
398: CSI [ p1 ] S
399: Scroll Up
400: Defaults: p1 = 1
401: Scrolls all text on the screen up p1 lines. New lines emptied at the
402: bottom are filled with the current attribute.
403:
404: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
405:
406: CSI [ p1 ] T
407: Scroll Down
408: Defaults: p1 = 1
409: Scrolls all text on the screen down p1 lines. New lines emptied at the
410: top are filled with the current attribute.
411:
412: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
413:
414: CSI U
415: NON-STANDARD (Disabled in current code)
416: Clear screen with default attribute.
417: This code is *supposed* to go to the "next page" according to the
418: ANSI/ECMA specs with CSI V going to "previous page"
419:
420: SOURCE: BANSI.TXT
421:
1.1.1.2 ! root 422: CSI [ p1 ] X
! 423: Erase Character
! 424: Defaults: p1 = 1
! 425: Erase p1 characters starting at the current character. Will not erase past the end
! 426: of line.
! 427: Erased characters are set to the current attribute.
! 428:
! 429: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
! 430:
1.1 root 431: CSI [ p1 ] Z
432: Cursor Backward Tabulation
433: Defaults: p1 = 1
434: Move the cursor to the p1th preceeding tab stop. Will not go past the
435: start of the line.
436:
437: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
438:
439: CSI [ p1 ] c
440: Device Attributes
441: Defaults: p1 = 0
442: If p1 is 0, CTerm will reply with the sequence:
443: CSI [ = 67;84;101;114;109;pN... c
444: 64;84;101;114;109 is the ASCII values of the "CTerm" string. pN is the
445: CVS revision ID of CTerm with dots converted to semi-colons.
446: Use the CVS revision to detect if a specific feature is available. If
447: you are adding features to a forked version of cterm, please do so by
448: adding an extra parameter to the end, not by incrementing any existing
449: one!
450:
451: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
452:
453: CSI [ p1 [ ; pX ... ] ] m
454: Select Graphic Rendition
455: Defaults: p1 = 0
456: Sets or clears one or more text attributes. Unlimited parameters are
457: supported and are applied in received order. The following are
458: supoprted:
459: Blink Bold FG BG (Modified)
460: 0 - Default attribute, white on black X X X X
461: 1 - Bright Intensity X
462: 2 - Dim intensty X
463: 5 - Blink (By definition, slow blink) X
464: 6 - Blink (By definition, fast blink) X
465: NOTE: Both blinks are the same speed.
466: 7 - Negative Image - Reverses FG and BG X X
467: 8 - Concealed characters, sets the X
468: forground colour to the background
469: colour.
470: 22 - Normal intensity X
471: 25 - Steady (Not blinking) X
472: 27 - Positive Image - Reverses FG and BG X X
473: NOTE: This should be a separate
474: attribute than 7 but this
475: implementation makes them equal
476: 30 - Black foreground X
477: 31 - Red foreground X
478: 32 - Green foreground X
479: 33 - Yellow foreground X
480: 34 - Blue foreground X
481: 35 - Magenta foreground X
482: 36 - Cyan foreground X
483: 37 - White foreground X
484: 39 - Default foreground (same as white) X
485: 40 - Black background X
486: 41 - Red background X
487: 42 - Green background X
488: 43 - Yellow background X
489: 44 - Blue background X
490: 45 - Magenta background X
491: 46 - Cyan background X
492: 47 - White background X
493: 49 - Default background (same as black) X
494:
495: All others are ignored.
496:
497: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
498:
499: CSI [ p1 ] n
500: Device Status Report
501: Defaults: p1 = 0
502: A request for a status report. CTerm handles the following three
503: requests:
504: 5 - Request a DSR
505: CTerm will always reply with CSI 0 n indicating
506: "ready, no malfunction detected"
507: 6 - Request active cursor position
508: CTerm will reply with CSI y ; x R where y is the current line
509: and x is
510: the current row.
511: 255 - NON-STANDARD EXTENSION
512: Replies as though a CSI [ 6 n was recieved with the cursor in
513: the bottom right corner. ie: Returns the terminal size as a
514: position report.
515:
516: SOURCE: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf
517: (parameters 5 and 6 only)
518: SOURCE: BANSI.TXT (parameter 255)
519:
520: CSI s
521: NON-STANDARD EXTENSION
522: Save Current Position
523: Saves the current cursor position for later restoring with CSI u
524: although this is non-standard, it's so widely used in the BBS world that
525: any terminal program MUST implement it.
526:
527: SOURCE: ANSI.SYS
528:
529: CSI u
530: NON-STANDARD EXTENSION
531: Restore Cursor Position
532: Move the cursor to the last position saved by CSI s. If no position has
533: been saved, the cursor is not moved.
534:
535: SOURCE: ANSI.SYS
536:
537: "ANSI" Music
538: ============
539: This is the place where the BBS world completely fell on it's face in ANSI
540: useage. A programmer with either TeleMate or QModem (the first two programs to
541: support "ANSI" music as far as I can tell) decided they needed a method of
542: playing music on a BBS conenction. They decided to add an "unused" ANSI code
543: and go their merry way. Since their product didn't implement CSI M (Delete
544: line) they assumed it was unused and blissfully broke the spec. They defined
545: "ANSI" music as:
546: CSI M <music string> 0x0a
547:
548: They used a subset of IBM BASICs PLAY statement functionality for ANSI music
549: strings which oftem start with "MF" or "MB", so the M after the CSI was often
550: considered as part of the music string. You would see things such as:
551: CSI MFABCD 0x0a and the F would not be played as a note. This just added
552: further confusion to the mess.
553:
554: Later on, BananaCom realized the conflict between delete line and music, so they
555: added *another* broken code CSI N (Properly, erase in field... not implemented
556: in many BBS clients) which was to provide an "unbroken" method of playing music
557: strings. They also used CSI Y to disambiguate delete line, CSI Y is supposed
558: to be a vertical tab (also not implemented in very many clients). BananaCom
559: also introduced many more non-standard and stardard-breaking control sequences
560: which are not supported by CTerm.
561:
562: CTerm has further introduced a standard compliant ANSI music introducer CSI |
563:
564: By default, CTerm allows both CSI N and CSI | to introduce a music string.
565: Allowed introducers are set by CSI = p1 M as defined above.
566:
567: The details of ANSI music are as follows then:
568: The following characters are allowed in music strings:
569: "aAbBcCdDeEfFgGlLmMnNoOpPsStT0123456789.-+#<> "
570: If any character not in this list is present, the music string is ignored as
571: is the introducing code.
572:
573: If the introducing code is CSI M the first char is examined, and if it is
574: a one of "BbFfLlSs" or if it is "N" or "n" and is not followed by a decimal
575: digit, then the music string is treated as though an M is located in front
576: of the first character.
577:
578: The music string is then parsed with the following sequences supported:
579: Mx sets misc music parameters where x is one of the following:
580: F - Plays music in the foreground, waiting for music to complete
581: playing before more characters are processed.
582: B - Play music in the background, allowing normal processing to
583: continue.
584: N - "Normal" not legato, not stacatto
585: L - Play notes legato
586: S - Play notes stacatto
587: T### Sets the tempo of the music where ### is one or more decimal digits.
588: If the decimal number is greater than 255, it is forced to 255.
589: If it is less than 32, it is forced to 32. The number signifies
590: quarter notes per minute.
591: The default tempo is 120.
592: O### Sets the octave of the music where ### is one or more decimal digits.
593: If the decimal number is greater than 6, it is forced to 6.
594: The default octave is 4.
595: N### Plays a single note by number. Valid values are 0 - 71. Invalid
596: values are played as silence. Note zero is C in octave 0.
597: See following section for valid note modifiers.
598: A, B, C, D, E, G, or P Plays the named note or pause from the current
599: octave. An "Octave" is the rising sequence of the following notes:
600: C, C#, D, D#, E, F, F#, G, G#, A, A#, B
601: This is contrary to normal music terminology.
602: The special note "P" is a pause.
603: Notes may be followed by one or more modifier characters which
604: are applied in order. If one overrides a previous one, the last
605: is used. The valid modifiers are:
606: + - Sharp. The next highest semitone is played.
607: Each sharp character will move up one semitone, so "C++"
608: is equivilent to "D".
609: # - Sharp. The next highest semitone is played.
610: Each sharp character will move up one semitone, so "C##"
611: is equivilent to "D".
612: - - Flat. The next lowest semitone is played.
613: Each flat character will move down one semitone, so "D--"
614: is equivilent to "C".
615: . - Duration is 1.5 times what it would otherwise be. Dots are not
616: cumulative, so "C.." is equivilent to "C."
617: ### - Notelength as a reciprical of the fraction of a whole note to
618: play the note for. For example, 4 would indicate a 1/4 note.
619: The default note length is 4.
620: L### Set the notelength parameter for all following notes which do not have
621: one specified (ie: override the quarter-note default) Leval note lengths
622: are 1-64 indicating the recibrical of the fraction (ie: 4 indicates a 1/4
623: note).
624: < Move the the next lowest octave.
625: Octave cannot go above six or below zero.
626: > Move to the next highest octave.
627: Octave cannot go above six or below zero.
628:
629: The lowest playable character is C in octave zero. The frequencies for the
630: six C notes for the seven octaves in rising order are:
631: 65406, 130810, 261620, 523250, 1046500, 2093000, 4186000
632:
633: Purists will note that the lower three octaves are not exactly one half of
634: the next higher octave in frequency. This is due to lost resolution of
635: low frequences. The notes *sound* correct to me. If anyone can give me
636: an excellent reason to change them (and more correct integer values for all
637: notes) I am willing to do that assuming the notes still sound "right".
638:
639: !!!PLEASE NOTE!!! If you are playing some ANSI Music then ask the user if they
640: heard it, ALWAYS follow it with an 0x0b 0x0a is the shift lock character which
641: *will* cause people with anything but an ANSI-BBS terminal (ie: *nix users using
642: the bundled telnet app) to have their screen messed up. 0x0b "undoes" the 0x0a.
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