Changes

As per [[Cosmos]], On File has been developed on the basis of the hardware peripherals as well as the software that were (contemporary) available for the CP/M and the CPC6128: the 512 KB [[Dobbertin Memory Expansion]], the [[ParaDOS]] or [[X-DDOS]] ROMS for the external (800 KB) floppy drive, the 20 MB [[Dobbertin Harddisc]], the [[Amstrad Serial Interface]], the Amstrad Parallel [[Printer Port]], the [[CTM640/CTM644]] colour monitor, the [[AMX Mouse]], the [[MicroScript]] (142 KB), the [[WordStar]] (706 KB), the [[Protext]] (406 KB), the [[Multiplan]] (208 KB), the [[SuperCalc 2]] (240 KB), the [[dBase II]] (272 KB), the [[DR Draw]] (235 KB), the [[DR Graph]] (306 KB), the [[MAXAM]] (206 KB), the [[Atlast Plus]] (224 KB) and other [[Programming software]]. On File includes its own a graphics routines (similar to [[GSX]])screen saver, is based on the [[Dobbertin]] version of CP/M 2.2 (v1.2) which provides 59 KB TPA, supports the RAM expansion and the 20 MB hard disk. <br>

On File database is disk-based, quick and reliable. It uses the CPC screen (80x25) as a single record; thus there is plenty of space to edit many different fields and store large amount of data. Every screen (record) is stored automatically in the disk with a different name, so that it can be accessed by other programs, like word processors. In order to set Setting up a new databaseusing On File is very easy: 1) Start a start the new file system by resetting the database and the master record. , 2) Frame frame and/or draw the master record. , 3) Edit edit the fields and the structure of the master record. , 4) Append append the records in the database on the basis of the master record. Every record has its own unique filename, stored in the disk drive. On File capacity is 200 records (equal to 400 KB), it is thus ideal for the 20 MB [[Dobbertin Harddisc]] which supports up to 512 file entries.

Relations: The database can be either flat or relational. Children records include the ^ symbol followed by the relational key and one space, for example ^Z80 . The relational key can contain up to 15 symbols (A..Z, a..z, 1..0,+,?, etc.). Parent records include the relational key (not the ^ symbol) followed by one space, for example Z80 . If a record contains more than one relational key, the key at the lowest field is set as the active key. In case of large databases move the parent records at the start of the database list.

Notes: On File capacity is 200 records (equal to 400 KB). The original disk contains some demo master records (*.002 files) as well as the boot sectors for CP/M 2.2 (v1.2)