8-Bit Software Online Conversion

ADFS This Advanced Disc Filing System contains a hierarchical directory structure which is not compatible with the existing Disc Filing System. The new filing system is, however, compatible with Winchester drives. A Winchester drive may be used as one drive number and one or more floppy drives used as other drive numbers. The filing system commands include: *ACCESS <List spec> (E) (L) (W) (R) - Prevents accidental deletion or erasure of files. L - Lock, R - Read, W - Write, E - Execute only. D is a pseudo variable set if the object <List spec> is a directory. In this case R and W have no meaning and are ignored. Default states: For a File W & R are set. For a directory D, L & R are set. *ADFS - starts ADFS from another filing system (A+BREAK is equivalent). *BACK - Used to go back to the previously selected directory prior to a *DIR or *BACK. *BYE - closes files and copies RAM buffer onto disc. *CDIR <Ob Spec> - creates a new directory with the name Ob Spec. *COMPACT <SP> <LP> - compacts information on a disc. <SP> is the Start Page of the memory area to be used whilst compacting and <LP> is the length in pages of the memory. If none specified, current screen used. *COPY <List Spec> <Ob Spec> - copies files defined by <List Spec> into directory defined by <Ob Spec>. *DESTROY <List Spec> - deletes multiple objects. *DIR <Ob Spec> - to select a new Currently Selected Directory. If no <Ob Spec> is specified the root of the directory is selected. At start up Drive 0 and the Root directory are automatically selected. *DISMOUNT (<Drive number>) - this command MUST be used before exchanging discs in a drive. *FADFS - same as ADFS but starts with no directory ie no disc start-up (F+BREAK is equiv). *FREE - displays free space left in sectors and bytes. *LCAT - catalogue the current library as in *CAT. *LEX - examine the current library as in *EX. *LIB <Ob Spec> - select the current library. *LOAD <Ob Spec> (<Load address>) - loads a file into memory at the specified start address or, if not defined, at the file's own start address. *MAP - display the free space map for the current drive. *MOUNT - initialises a disc. *OPT 1 (n) - this enables or disables the display of a file's information each time a file is accessed on a disc. n = 1 to 99 to enable n = 0 to disable *OPT 4 (n) - changes the auto-start action, [SHIFT] and [BREAK], of the disc in the currently selected drive. *OPT 4 0 does nothing *OPT 4 1 will *LOAD the file !BOOT *OPT 4 2 will *RUN the file !BOOT *OPT 4 3 will *EXEC the file !BOOT *REMOVE <Ob Spec> - same as *DELETE except that no error message is produced if the object does not exist. *RENAME <Ob Spec> <Ob Spec> - renames an object and moves it to another directory if required. *RUN <Ob Spec> <Optional parameters> - this command loads a file into memory and then jumps to its execution address, unless the execution address is FFFFFFFF when the file is EXEC'd as a text file. *SAVE <Ob Spec> <Start addr> <Fin addr> (<Exe addr>) (<Reload addr>) - saves an area of memory, typically a machine code program, into a file on the disc. A maximum of 47 objects can be held in a directory. *SPOOL <Ob Spec> - opens the named file, and spools subsequent screen output to that file and closes the file when terminated with *SPOOL (cr). *TITLE <Title> - changes the title of the currently selected directory (a maximum of 19 characters are allowed). NOTE: See MOS spec for other common filing system commands. The following calls are relevant for accessing files from assembly language: OSFIND - Opens a file for reading/writing update OSFILE - Load/Save data. Enquire after/Alter catalogue information. OSARGS - Reads/Writes an open file's attributes. OSGBPB - Write/Read a group of bytes to/from a specified open file. OSBGET - Gets a byte from a specified open file. OSBPUT - Puts a byte to a specified open file. Four OSWORD calls are recognised by ADFS: OSWORD with A=&70 - Read master sequence number and status byte. OSWORD with A=&71 - Read free space. OSWORD with A=&72 - Access disc controller. OSWORD with A=&73 - Read last error information.