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Character-constants are names for characters, which TV translates into their
ASCII equivalents. Note, that not all conversions are standard. TV makes
no distinction between upper- and lower-case names. Character-constants are:
back = BACKSPACE (ASCII 008)
backspace = BACKSPACE (ASCII 008)
cr = RET (ASCII 013)
ctrl_a = CTRL_A (ASCII 001)
ctrl_b = CTRL_B (ASCII 002)
ctrl_c = CTRL_C (ASCII 003)
ctrl_d = CTRL_D (ASCII 004)
ctrl_e = CTRL_E (ASCII 005)
ctrl_f = CTRL_F (ASCII 006)
ctrl_g = CTRL_G (ASCII 007)
ctrl_h = CTRL_H (ASCII 008)
ctrl_i = CTRL_I (ASCII 009)
ctrl_j = CTRL_J (ASCII 010)
ctrl_k = CTRL_K (ASCII 011)
ctrl_l = CTRL_L (ASCII 012)
ctrl_m = CTRL_M (ASCII 013)
ctrl_n = CTRL_N (ASCII 014)
ctrl_o = CTRL_O (ASCII 015)
ctrl_p = CTRL_P (ASCII 016)
ctrl_q = CTRL_Q (ASCII 017)
ctrl_r = CTRL_R (ASCII 018)
ctrl_s = CTRL_S (ASCII 019)
ctrl_t = CTRL_T (ASCII 020)
ctrl_u = CTRL_U (ASCII 021)
ctrl_v = CTRL_V (ASCII 022)
ctrl_w = CTRL_W (ASCII 023)
ctrl_x = CTRL_X (ASCII 024)
ctrl_y = CTRL_Y (ASCII 025)
ctrl_z = CTRL_Z (ASCII 026)
del = DEL (ASCII 127)
down = DOWN (char 150; non-standard)
esc = ESC (ASCII 027)
escape = ESC (ASCII 027)
enter = ENTER (char 153; non-standard)
f00 = HELP (char 148; non-standard)
f0 = HELP (char 148; non-standard)
f01 = F1 (char 128; non-standard)
f1 = F1 (char 128; non-standard)
f02 = F2 (char 129; non-standard)
f2 = F2 (char 129; non-standard)
f03 = F3 (char 130; non-standard)
f3 = F3 (char 130; non-standard)
f04 = F4 (char 131; non-standard)
f4 = F4 (char 131; non-standard)
f05 = F5 (char 132; non-standard)
f5 = F5 (char 132; non-standard)
f06 = F6 (char 133; non-standard)
f6 = F6 (char 133; non-standard)
f07 = F7 (char 134; non-standard)
f7 = F7 (char 134; non-standard)
f08 = F8 (char 135; non-standard)
f8 = F8 (char 135; non-standard)
f09 = F9 (char 136; non-standard)
f9 = F9 (char 136; non-standard)
f10 = F10 (char 137; non-standard)
f11 = F11 (char 138; non-standard)
f12 = F12 (char 139; non-standard)
f13 = F13 (char 140; non-standard)
f14 = F14 (char 141; non-standard)
f15 = F15 (char 142; non-standard)
f16 = F16 (char 143; non-standard)
f17 = F17 (char 144; non-standard)
f18 = F18 (char 145; non-standard)
f19 = F19 (char 146; non-standard)
f20 = F20 (char 147; non-standard)
help = HELP (char 148; non-standard)
left = LEFT (char 151; non-standard)
lf = NL (ASCII 010)
null = '0' (ASCII 000)
nl = NL (ASCII 010)
return = NL (ASCII 010)
right = RIGHT (char 152; non-standard)
tab = TAB (ASCII 009)
space = ' ' (ASCII 032)
up = UP (char 149; non-standard)
underscore = '_' (ASCII 095)