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-
-
- ******* fMSX *******
- The Portable MSX/MSX2/MSX2+ Emulator
- version 1.5
-
- by Marat Fayzullin
-
- Acorn Port by David McEwen
- Port Version : 0.25 (27/8/98)
-
- New In This Version
- -------------------
-
- * Assembler plotter
- * In built speed throttling on SA if Uperiod is 1
-
-
-
- Introduction
- ------------
-
- This is a port of Marat's MSX emulator. This is an excellent emulator, it
- basically provides a complete computer... This computer however has a great
- selection of games... from Aleste to VKiller - a sort of Castlevania.
-
- **Please ensure that your machine has at least 800k free**
-
-
- Use with pre RiscPC machines
- ----------------------------
-
- The best way to get it running is to increase the Uperiod and decrease the
- Iperiod. This will unfortunately delay response, but will make it run faster.
- The screen mode is enforced at 320 by 256. The actual mode is determined by
- colour depth so for 16 colours you will get Mode 9 and for 256 you will get
- Mode 13.
-
-
- What is MSX?
- ------------
-
- MSX is an old Z80-based family of home computers which appeared in 1982
- as an attempt to establish a single standard in home computing similar to
- VHS in video. They were popular in Asian (Korea, Japan) and South American
- (Brazil, Chile) countries as well as in Europe (Holland, France) and
- former Soviet Union, but they are virtually unknown in USA. Although MSX
- standard quietly died to year 1988, the world got to see MSX2, MSX2+ and
- TurboR extensions of it.
- In spite of its sad history, MSX is a very nice computer, especially
- useful for educational purposes which is clearly indicated by example of
- the Soviet Union. Russian Ministry of Education bought hundreds of MSXes
- (and later MSX2s) grouped into "computerized classroom systems" of 10-16
- machines interconnected by a simple network. Entire generation of
- programmers has grown up using these computers.
- Hardware-wise, MSX represents a hybride of a Nintendo Entertainment
- System and a generic CP/M-80 machine. Its heart is Z80 CPU working at
- 3.58MHz in the base model (frequency was doubled in TurboR). The video
- subsystem is built around TI9918 or TI9928 VDP chip also used in Texas
- Instruments' TI-99/4 computers. In the later MSX models this chip was
- upgraded to V9938 (MSX2) and V9958 (MSX2+ and TurboR). The latest version
- is V9990. The audio system is handled by AY-3-8910 chip by General
- Electric, same as the one used in Sinclair ZXSpectrum128 audio. AY-3-8910
- provides 3 channels of synthetized sound, noise generation, and two
- general purpose parallel IO ports which are used for joysticks and some
- other things in the MSX design. Due to their hardware structure, MSX
- machines were perfectly suitable for games and there is a lot of good
- games either written or ported to them. You can find more information
- about MSX and remaining MSX fans at http://www.komkon.org/fms/MSX/
-
-
- How do I use it ?
- -----------------
-
- There are various ways of using this machine, it depends on what you are
- using :
-
- Rom Images:<.rom files>
- These should have dos extension stripped and be filetyped to MSXRom.
- Then you can just double click on them.
-
- Disks Images:<.dsk files>
- These should have dos extension stripped and be filetyped to MSXDsk.
- Then you drag them to the Options window into either the drive A or
- the drive B slot.
-
- Tape Images:<.cas files>
- These should have dos extension stripped and be filetyped to MSXTap.
- Then you drag them to the Options window into the Tape slot.
-
- You can create or read Disk images using the programs wrdsk and rddsk respectively.
-
- When using wrdsk please ensure that the files you are copy across have their DOS
- extensions as I haven't built in any conversion between filetypes and extensions.
- These are both very primitive programs that run in the command line. I have used
- the frontend module to create a crude front end for them. It would be
- preferable to have some sort of image file system, but I really don't have time
- to delve into that sort of thing! So if someone wants to write one I can provide
- them with the source to the reading and writing programs, which are direct ports
- of what is provided by Marat.
-
- On the disks or tapes you may find files with extension .BIN,.OBJ or .GM
- These are o-called BLOADable binary files. They can be run from MSX
- BASIC with
-
- BLOAD "filename",R
-
- There may also be .COM files. These are MSX DOS command files.
- Boot MSX DOS and run them from there.
-
- As standard the Acorn port comes with the following Roms:
- They are all stored in the !Fmsx.Roms directory. They don't need to be run
- separately. They are loaded automatically when found.
-
- MSX - Standard MSX BIOS and BASIC code
- MSX2 - MSX2 BIOS and BASIC code
- MSX2EXT - MSX2 ExtROM containing system extensions
- MSX2P - MSX2+ BIOS and BASIC code
- MSX2PEXT - MSX2+ ExtROM containing system extensions
- DISK - MSX DiskROM containing BDOS and DISK BASIC (optional)
- RS232 - RS232 BIOS and BASIC extensions (optional)
- FMPAC - FM-PAC BIOS and BASIC extensions (optional)
- MSXDOS2 - MSXDOS2 system core (optional)
- CMOS - Non-volatile memory used in MSX2 and MSX2+. This file gets
- rewritten on exit if non-volatile memory was changed.
-
- This is an extra rom that can be found - just copy it into the Roms directory
- stripping the dos extension
- PAINTER - Yamaha Painter, graphical editor found in Russian MSX
- machines from Yamaha (optional)
-
- The frontend allows you to alter various variables that will affect the
- speed of the game - the Uperiod and Iperiod values. Uperiod is the number of
- interrupts per screen update and the Iperiod is the internal interrupt period.
- In simple terms to speed up the emulator either increase Uperiod, decrease
- Iperiod or both. To slow it down decrease Uperiod, increase Iperiod or both.
-
- There are several resolution choices available. The first 4 are simple resolutions
- no scaling is implemented. The last 2 are full screen modes and these are exactly
- what they say. The slow version is slow because it plots 4 times the number of pixels.
- You can also select colour depth. The 16 colour version should be quicker in that
- the emulator is effectively writing less to screen... (however with a StrongARM I
- couldn't spot much difference in speed).
- The fast version is just y doubled. The MDF file included provides definitions for
- the modes on an AKF60 monitor. They are : 512 by 384 and 256 by 384 modes if you
- wish to define your own.
-
- Once the emulator is running the keys are mapped to their Acorn equivalents.
- So there is little or no difference to be spotted. There are a couple of keys
- yet to be mapped, but they are of little importance. They will of course be
- added in the next release.
-
- *FAQ*
- -----
-
- Why are my Roms/Disk images not working ?
- -------------------
-
- Try downloading them again. Try different machines, most games require an MSX 2
- Another thing to try is altering the MegaROM type... this is a matter of trial
- and error.
-
- If there is still no joy. Send the image to Marat and see if he can
- find a reason.
-
- Where's the sound ?
- -------------------
-
- This is being worked on... as with the Coleco emulator I hope to get this
- working soon.
-
- Do I need a special screen mode ?
- ---------------------------------
-
- Nope the emulator runs happily in a 320 by 256 mode as the screen fits nicely.
- The full screen modes require specially defined modes... a Mode Definition File
- is included.
-
- Will you get it to run in the desktop ?
- ---------------------------------------
-
- This will be coming shortly, hopefully with sound!
-
- fMSX version 2.0 is due out soon will you be porting this ?
- ------------------------------------------------------------
-
- As soon as the source is available I shall get to work. It has some speed up
- features in it that could help out in the quest for speed. It just depends on
- Uni work what the timescale will be, but it shouldn't take long, the machine
- is not very complex.
-
- Will you be porting any other emulators ?
- -----------------------------------------
-
- Yes! - although aren't 2(nearly 3) ports enough?
-
- You probably already know about XNes...
- Look out for some interesting emulators then...
- Anyone out there heard of the Sega System 16 arcade setup?
-
-
- Copyright and Disclaimer
- ------------------------
-
- This emulator is copyright Marat Fayzullin 1994-6, and the Acorn-specific
- components are copyright David McEwen 1998. You may not attempt to pass off
- any part of this work as your own, although you may distribute it freely as
- long as you supply the complete archive (that is, all the files supplied to
- you).
-
- This software is supplied "as is". I make no claims about the reliability or
- suitability for any purpose of this emulator, and any use of it is undertaken
- at your own risk. No responsibility is taken for any failure of the software,
- or for any loss or damage caused directly or indirectly by the software.
-
- Whilst I will endeavour to help you if you have problems with this emulator,
- no such support is guaranteed.
-
- In the above "This emulator" refers to everything supplied within this
- archive, which is specifically the !Fmsx application and all the files
- contained within it, and also the documentation files (including the one you
- are reading now).
-
-
-
- COMMENTS
- --------
-
- Any comments about the emulator as such should go to Marat Fayzullin :
- email : fms@komkon.org
- Website : http://www.komkon.org/fms
-
- Any comments about the Acorn specific parts and please no inane emails giving
- me ways of making money etc... just useful constructive stuff please
- email : dem95c@cs.nott.ac.uk
- Website : http://www.cs.nott.ac.uk/~dem95c
-
-
- Thanks
- -------
-
- Thanks to Richard Hallas for creating some excellent icons for the emulator.
-
- Thanks also to Gareth Moore for providing help on returning to the desktop
- screen mode (indeed I use his Redraw file!) and for putting info on his
- Acorn Gaming web site.
-
- Thanks to David Sharp for putting information up on his excellent web site.
-
- Thanks also to Acorn User for mentioning the emulator port in the April 1998
- issue.