Changes

[[Image:On_File_typical_record.jpg|right|thumb|250px|On File (2024) fuel consumption record]][[Image:On_File_Car_Maintenance_Record.jpg|right|thumb|250px|On File (2024) car maintenance record]][[Image:OnFile_2025_Main_Menu.jpg|right|thumb|250px|On File (2025) main menu (containing 200 records, 1640 registrations)]][[Image:OnFile_2025_CPC6128_Record.jpg|right|thumb|250px|On File (2025) CPC6128 record which also includes field-based graphics]]

'''On File (2024)''' Database Management System was released in June 2024 by [[KSL]] in order to celebrate the anniversaries of CPC (40 years!) and CP/M-80 (50 years!). On File is a business application similar to the MSDOS-era PC applications and one of the most recent projects developed for '''CP/M2.2'''. As per [[Cosmos]], On File has been developed on the basis of all the hardware peripherals as well as the software that were (contemporary) available for the CP/M and the CPC6128. However, it can run on a standard single drive CPC6128. On File database is efficient, quick and reliable and can be used on an everyday basis using the CPC emulators. On File database It uses the entire CPC screen as the platform for the records; thus there is plenty of space to edit user-defined fields. In addition, a wide variety of characters and symbols can be included in the fileds, hence the records can contain data beyond the typical and traditional text type. Setting up a new database using On File database is very easy and can be performed in three steps: 1) start the new file system by resetting the database and the master record, 2) frame/draw and edit the structure of the master record, 3) append new records in the database on the basis of the master record. On File database is fully dynamic, thus the user can modify the master record as well as any record anytime. Furthermore, the database can be either flat or relational. Children records include the ^ symbol followed by the relational key and one space, for example ^Z80 . Parent records include the relational key On File (not the ^ symbol2024) followed by one space, for example Z80 . On File database has maximum capacity of 200 records (400 KB). The original disk contains the application boot sectors for CP/M 2.2 (ONFILEDobbertin v1.COM2 for 128 KB RAM), some a few demo master records (*.002 files), some demo records (*.REC files)a few database examples, the screen saver application (ONFILE.CHN), data files (ONFILE.00?COM file), as well as the boot sectors for CP/M 2.2 color screen saver (v1.2CHN file).

'''On File (2025)''' Database Management System will be for '''CP/M plus''' was released in summer June 2025 and will include . In addition to the option 2024 version, it includes the options to Group and to Invert the records as well as , to Index the database, to perform Index based search and to perform field based calculations. It also supports [[GSX]], '''field-based graphics''', unlimited number of Relational Keys and On Board help. It also includes '''On File Register''', a RAM-disk based register book. The latter will provide provides capacity for a few thousands of single-field records. Hence, the user can set up e.g. a Register of Earthquakes (date, time, location, magnitude, depth, duration) using On File Register, while keeping detailed records of specific earthquakes (e.g. > 6 R) using On File Database. On File 2025 requires RAM expansion to run and has includes a resume option in order to access the RAM-disk contents upon restart. The original disk contains CP/M plus boot sectors (Dobbertin v1.1x), a database of old computers and a register book for the period 1970-1989. On File database (2024/2025) is disk-based, thus all the records are stored in the disk drive as stand-alone files. On the other hand, On File Register uses a single file to store the records in the RAM-disk. For large register books which contain more than 64 records, a 16 KB "cache" memory is implemented in order to be able to move back and forth while reading the records. Notice, that in the amount of data that can be stored 2025 version, in order to maximize the free directory entries and accessed using to overcome the Compiler and Editor Overflow, a big part of the On File Database/Register resembles to source code (ONFILE.COM) has been '''encapsulated in the 16-bit world source code''' of computing the Register Book ([[Other Computers:16 bit computers]]REGISTER.COM)and is accessed upon user request via boolean expressions that are temporarily stored in the RAM-disk.

Notice, that in What gap of the 80's does On File (2025 version) come to fill? Let’s give an example. Using On File Register, a register book can be set up with, for example, 5000 citizens of a town. The register book (~210 KB) is saved in order to maximize the free directory entries disk (disk 0) and to overcome is loaded once in the Compiler and Editor Overflow, a big part RAM of the CPC6128. Then, using On File source code (ONFILEDatabase, a full-screen record can be created for each citizen.COMThe records of the database are saved in 26 different disks (disks A-Z or HD20) has been '''encapsulated''' , depending on the surname of each resident. Notice, that the register book remains in RAM until the source code end of Register Book the work regardless of which disk (REGISTER.COMA-Z/HD20) and is accessed upon user request via boolean expressions that are temporarily stored in used. Upon exit, the contents of the RAM-(register book, if modified) are saved in disk0. This can be achieved with an Amstrad CPC6128 with 512 KB RAM expansion, a 800 KB external floppy drive, the specific version of CP/M plus (v1.1x), RamDOS D20 disks or HD20.  Using the following two links you can download On FIle (2024) and On File (2025) respectively.