This is the variable that is set by RAND.Ĭounts the frames displayed on the television. Length of string type destination in assignment.Īddress of next item in syntax table (very unlikely to be useful). Number of blank lines above or below picture: 55 in Britain, 31 in America.Īddress of next program line to be executed. The number of the top program line in automatic listings. The number of lines (including one blank line) in the lower part of the screen. Can be poked so that PRINT output is sent elsewhere.Īddress of the next character to be interpreted: the character after the argument of PEEK, or the NEWLINE at the end of a POKE statement.Īddress of the character preceding the marker.Īddress of area used for calculator's memory. what is being displayed on screenĪddress of PRINT position in display file. Pointer to the start of the 'Display file', i.e. Number of current line (with program cursor).
There is no header.Ġ Identifies ZX81 BASIC in saved programs. On a ZX81, a saved BASIC file is a snapshot of the computer memory from memory location 16393 through to the end of the variable table. When programs were SAVEd, the file written to disk or tape contained all of BASIC's internal state information, including the values of any defined basic variables, as well as the BASIC tokens.
Sinclair zx spectrum symbos plus#
Some commands needed multiple keypresses to enter, For example, BEEP was keyed by pressing CAPS SHIFT plus SYMBOL SHIFT to access extended mode, keeping SYMBOL SHIFT held down and pressing Z. For example, pressing P caused the entire command PRINT to appear.
Sinclair BASIC is a dialect of the BASIC programming language created by Nine Tiles Networks Ltd and used in the 8-bit home computers from Sinclair Research and Timex Sinclair.
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