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Last modified on 15 July 2011, at 11:41

FutureOS

Revision as of 11:41, 15 July 2011 by TFM (Talk | contribs) (→‎File system)

FutureOS-Logo
FutureOS main screen

Introduction

FutureOS is an operating system for the Amstrad CPC6128, 6128Plus, C-One and CPC TREX. The version for the CPCPlus supports some of its special features. FutureOS is developed by TFM of FutureSoft in Z80 assembler. The development of FutureOS and its applications continues from 1989 up to now (2011). FutureOS allows the user to control the computer with HIDs. The surface provides an icon section and a file section; it can deal with files up to 4 MB in one piece. It has a dynamic memory management system, which divides RAM usually into 16 KB blocks - or in smaller pieces. Further it supports a variety of hardware expansions. FutureOS is delivered together with a variety of utilities in the same four ROMs. Additional expansion ROMs can be added.

Requirements

The core of the OS needs 64 KB ROM. Compatible products are EPROM-cards, the ROM-RAM-BOX, SYMBiFACE II, RAMcard, Jareks Flash-ROM, MegaROM or similar products. If you don't own such a card, you can take a look at FutureOS by using a compatible CPC Emulator (JavaCPC, WinCPC, Caprice, WinApe, CPCEmu).

The core of the OS itself is executed directly in (Pseudo-)ROM or EPROM (in four 16 KB blocks). It jumps between the ROMs with the help of a little common area. Therefore the numbers of the four 16 KB ROMs are hardcoded, but the jumps are very quick.

FutureOS uses 2 KB (&B800...&BFFF) of the first 64 KB; the remaining RAM is available to applications. Additional RAM can be reserved for DIRectory buffering. Furthermore the OS uses memory management (up to 4 MB), file-handling and specialized Low/Mid/High-level routines to access the hardware.

FutureOS can be launched from AmsDOS with the RSX commands |OS or |FDESK. If you use |FDESK you can leave FutureOS and get back to BASIC where you have stopped before - the first 48 KB (not the screen) have been preserved.

FutureOS only runs well on a CPC6128 or 6128plus (not CPC464 or 664), because of their support for RAM configuration C3 (essential for the mouse pointer). FutureOS is not compatible with native AMSDOS or CP/M programs. It needs a Class 2 CPC, it runs best with a Class 4 CPC or higher.

User Interface

The User Interface (UI) of FutureOS presents the user with three sections: the icon section (upper half of screen), the file window (lower half of screen) and the message line (bottom of screen). It appears directly after starting FutureOS, but can also be used by applications. The user can browse through directories of discs and hard-disc partitions. The size of the text window is fixed, due to this 64 different file names can be displayed at once (this equals one complete directory of a data of system formatted disc f.e.). Instead of scrolling, you browse page by page through the used directories. A mouse pointer is used to select devices, functions or files; this pointer can be controlled with nearly all of the pointer based HID devices (joystick, mouse, trackball, light-pen, grafpad etc.) available for the CPC.

Applications can call the UI and the user returns to the application using the OK icon. The icons are fixed, therefore the layout remains stable throughout its use and on every CPC using FutureOS.

Files can be viewed on-screen (scroll up and down) or printed. When typing a text file it is possible to set the number of columns and lines of the window the text is displayed in.

File headers can also be viewed. FutureOS uses expanded but compatible file-headers, that allow a file to be up to 16 MB in length. The file-header can additionally specify the target RAM of a file. Further it can contain a file icon or a short file description.

Further there is the FutureOS Monitor, which provides access to RAM, ROM, Z80 registes, I/O ports and allows the resting of routines.

CBM.png
CBM

The "command bar menu" (CBM) is a non resident part of FutureOS, which can be easily linked into applications. It's user interface consists of several flexible pull down menus and file selectors. Using CBM as the standard UI for FutureOS programs helps making them looking similar and useable in an intuitive way. A part of the CBM is located in the FutureOS ROMs, another part can be individually adapted to its target applications and will be integrated in the application itself.

Example of FutureOS file header

File system

The file system of FutureOS can handle multiple simultaneous floppy disc drives and hard disc partitions. After the selection of the devices FutureOS reads and buffers the directory entries of the devices. This speeds up the the data transfer significantly. Integrated utilities like the multi file copy can copy files from physical sources to different physical destinations in one run.

The file system is compatible with the CPCs native data-, file- and format structures (f. e. File header, Disc formats), but expanded in many ways. FutureOS supports the Data, IBM, System, Vendor and Vortex (704 KB) disc formats.

Filenames can use all 256 different characters and user areas from 0 to 254 (except for &E5, which is reserved for deleted files). Unlike Amsdos, a file that is erased under FutureOS is not shifted to user &E5, but is physically removed from the directory. During this process the directory get sorted. File headers can be displayed as small text files or as graphic icons (f. e. a FutureOS applikation). An AmsDOS file header has 128 bytes of which most are unused. FutureOS makes use of those unused bytes so that files have a length definition of 24 bit (16 MB file length) and can have a physical RAM select. Therefore a file can be defined to be loaded everywhere in the external RAM. Also a FutureOS file-header can contain a graphical icon, a textual icon or a short description of the file.

FutureOS includes the fastest FDC-based disc- and file-reading and writing routines for the CPC. This is possible by ignoring the interleave factor, reading one physical sector directly after each other to the correct position in memory but also by just starting with the first appearing sector of every new track. In addition the DIRectory is buffered in RAM, the head of the floppy must not step back to look for the next block. The track step rate is increased and can be adjusted for every drive. It's even faster than optimized copy programs like Crowns' Crime.

Implementation of Hardware

The OS supports many of the hardware available for the CPC. One of the ambitions of FutureOS is to support all hardware available. Hardware expansions usually need drivers that can be flexibly added to an OS. Contrary to this approach, a goal of FutureOS is to provide a monolithic architecture where all drivers are implemented in a hardcoded way.

  • Disc drives and hard discs: FutureOS supports up to eight floppy disc drives and up to four hard disc partitions (Dobbertin HD20 hard disc). It buffers the directories read from any mass storage device in the expansion RAM to speed up drive access.
  • Plug and Play: If a hardware expansion is connected to the CPC FutureOS will automatically detect that expansion, initialise it and make it available to user and applications. The architecture of the OS allows you to add and remove hardware on purpose (hot plug and play). You can switch external hardware on or off in the configuration bytes (use ConfigOS utility).

Usage of memory

The OS uses only small amounts of the memory of the CPC since it is located and executed in ROM. When using the Desktop the OS uses the RAM between &A000 and &BFFF (8 KB). In case an application is running the RAM that is used by the OS can be reduced to the region between &B800 and &BFFF, in this case only 2 KB are occupied by system variables of the OS. Depending on the amount of active drives and HD partitions additonal expansion RAM blocks will be occupied, but there is no reduction in free main memory (first 64 KB).

FutureOS provides all needed functions to check for, order, allocate and manage expansion RAM up to 4 MB.

OS supported Hardware

printer ports

Drives

and ...

Expansion cards

Hard-disc

Joysticks

Memory expansions

Real-Time-Clocks

Networking

Both have poor support at the moment

OS unsupported Hardware

Additional HIDs

The following pointer-based input devices are supported by the file management module. Applications can use them by calling the appropriate OS function in OS-ROMs A, C or D.

Mice

Lightpens

Graphic Tablets

Trackballs

ROM-included Utilities

The FutureOS roms already include several utilities as an addition to the operating system. Tools like copy (files or discs), format discs (data-, system-, ibm- and Vortex-format), erase files, rename files, type and print files, set alarm time, set time of RTC, verify discs or directory refreshing are available without the need to load them from an external medium. Multiple files can be copied between different physical media in one go.

A small machine monitor is also provided. The FutureOS Monitor provides features like CPU register editing, I/O ports, memory editing and display and manipulation of the ASIC contents (6128 Plus). Memory blocks can be copied or initialised. It is possible to call a routine with defined CPU registers (complete register set) and memory.

Developing for FutureOS

You can developp very freely: the RSTs are free for use, you can choose the interrupt mode and access all the hardware. Also the second register set of the Z80 can be completely used by applications.

  • Z80 Assembler: You can use an assembler for AmsDOS or for CP/M. Switching between AmsDOS and FutureOS is fast and using |FDESK allows to come back to AmsDOS with the first 48 KB or RAM remaining untouched. There is a Z80 library for FutureOS the programmer can use for own applications. In addition CBM can make applicatioin developpment easy and quick.
  • Programming in C for FutureOS: With FIOLIB - the IO-Lib for FutuerOS it's also possible to use C as a programming language. Beside the usual I/O the FIOLIB provides a lot of valuable functions for management of text, keyboard, files, relative files, screen, colors, grafix and more.

Applications / Demos / Games

The following programs can be downloaded at the FutureOS homepage, see Weblinks below.

Conclusion

FutureOS is designed as an OS with fast system calls and support for nearly all CPC expansions. It has specialised file handling and memory management capabilities that support programs up to 4 MB and files up to 16 MB. The idea is that development of professional software, games, graphic tools, word processors, sound, management of big amounts of data, and programming languages are possible in this environment. At this point, the user can do all this, like listen to MP3 files, work with graphic, use and create C programs, watch movies, demos and play games (see weblinks).

Web links

-- Youtube Videos --