Sep 5, 2024 · NFS · OSFILE : File and directory operations · OSARGS : Information on open objects · OSBGET : Read (get) a byte · OSBPUT : Write (put) a byte.

Feb 11, 2024 · VDU 19 sets the logical colour, used in GCOL (VDU 18) or COLOUR (VDU 17) to the provided physical colour. The physical colour is set with a physical colour ...

Feb 15, 2024 · GCOL ... GCOL is used to select the logical colours used by graphics statements. GCOL. Availability, Present in all original versions of BBC ...

Feb 11, 2024 · If the channel is zero the current directory is scanned. On platforms where the channel is passed in a register this can be a pointer to a directory name, or ...

Jan 4, 2024 · INKEY and INKEY$ call OSBYTE &81. INKEY returns a character or -1 for no character, INKEY$ returns a one-character string or a null string if nothing returned.

Nov 3, 2024 · Defines a character or performs various miscellaneous VDU functions. Unrecognised or unimplemented commands are passed to VDUV, on platforms where VDUV is ...

Feb 15, 2024 · VDU is a BASIC statement to send characters to the screen, printer, serial port or other output device. It is usually used to generate VDU sequences that ...

Nov 3, 2024 · The 6845 CRTC (Cathode Ray Tube Controller) controls how the display is generated. It is written to with VDU 23,0 which also takes account of the current ...

Nov 6, 2024 · The service entry is an entry point in a paged ROM that is called by the MOS, allowing the ROM to initialise, to claim and release resources, ...

Sep 27, 2024 · Description. BBC BASIC stores real (non-integer) numbers in five bytes in a format known as "five-byte floating point". This splits the number into two ...