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 boot sectors for CP/M 2.2 (Dobbertin v1.2 for 128 KB RAM), a few demo master records (*.002 files), a few database examples, the application (COM file), as well as the color screen saver (CHN 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 2024 version, it includes the options to Group and to Invert the records, to perform slideshow, to index Index the database, as well as 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 2025 version, in order to maximize the free directory entries and to overcome the Compiler and Editor Overflow, a big part of the On File source code (ONFILE.COM) has been '''encapsulated in the source code''' of the Register Book (REGISTER.COM) and is accessed upon user request via boolean expressions that are temporarily stored in the RAM-disk.

The original 2025 disk will contain What gap of the stand-alone application files ONFILE80's does On File (2025) come to fill? Let’s give an example.COM and REGISTER.COMUsing On File Register, the screen saver ONFILE.CHNa register book can be set up with, some demo records (*.REC)for example, 5000 citizens of a few application files (ONFILEtown.00?The register book (~210 KB), a few master records is saved in disk (*.002disk 0) and is loaded once in the RAM of the CPC6128. Then, using On File Database, a demo full-screen record can be created for each citizen. The records of the register book database are saved in 26 different disks (REGISTER.DATdisks A-Z or HD20), depending on the surname of each resident. Notice, that in the 2025 version, register book remains in order to maximize RAM until the free directory entries and to overcome end of the Compiler and Editor Overflowwork regardless of which disk (A-Z/HD20) is used. Upon exit, a big part the contents of the On File source code RAM (ONFILE.COMregister book, if modified) has been '''encapsulated are saved in disk 0. This can be achieved with an Amstrad CPC6128 with 512 KB RAM expansion, a 800 KB external floppy drive, the source code''' specific version of the Register Book CP/M plus (REGISTERv1.COM1x) and is accessed upon user request via boolean expressions that are temporarily stored in , RamDOS D20 disks or HD20.  Using the RAM-diskfollowing two links you can download On FIle (2024) and On File (2025) respectively.