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- REGARDING THE 1.0b RELEASE AND OTHER NEWS
- ─────────────────────────────────────────────────────────────────────
-
- We received tons of mail from all over the world and it's nice to see
- that some extra FTP/FSP/WWW-sites, BBS's appeared. We try to reply to
- all the mail we receive but it's possible that we missed some of your
- messages or didn't have the time to reply. We can't send you the ROM
- files or any other (c)opyrighted program so please don't ask for it.
-
- Speaking of ROM files: we pestered ASCII with mail and E-Mail and we
- tried other channels for information but we still haven't got a
- license to distribute the ROM files.
-
- We changed some things regarding registering the emulator:
- ■ We won't send you a laser printed bound manual because there was a
- lot of confusion about it (what version, how many) and the prices to
- send them overseas are much to steep.
- ■ There's no difference anymore between a shareware and commercial
- registration. This caused a lot of confusion too and since we're not
- planning on getting rich on this product there's now only one type
- of registration fee.
- For those of you that think we're a commercial company and that this
- is a big time project: we're just three guys programming on a hobby
- project and the registration is merely a token of appreciation for our
- work and to compensate for the expenses we made on developing the
- emulator. We're NOT making any profit whatsoever.
-
- The video code took a lot of time to write. Many methods have been
- tried and many weren't fast enough or lacked features. We are now
- detecting your VGA card or VESA BIOS and we hope that it works for all
- VGA cards available. We have tested it on some cards (ET4000, Trident,
- Paradise and Diamond) but we can't test it on all possible cards.
- That's another reason to release this beta version.
-
- The sound emulation is becoming better and better, but we still can't
- start coding for wave table soundcards (like GUS) if we can't borrow
- one from someone.
-
- We thoroughly experimented with and studied DOS 2.xx emulation and
- decided to drop it. There's a simple and restricted DOS 2.20
- emulation. The problems are all relates to technical details and
- problems. It basically comes down to this: whatever DOS 2.xx or
- interface we would emulate (DOS 2.20, DOS 2.3x, BERT, other MSX-SCSI)
- there's still a limit in the diskROM code of 16 bits for sector
- addressing. If the sector size stays 512 bytes (it is for every
- interface we know) then there is a 32Mb maximum of a partition. This
- would imply that you have to dedicate (or at least create) one or more
- 32Mb partition(s) of your harddisk to the MSX emulator. The other
- solution would be a 32Mb file on the harddisk.
- Because the current code already supports harddisks (in fact: all
- devices using INT 021h (also CD-ROM drives, high density disk drives,
- etc.)) we decided to drop the research and development on DOS 2.xx or
- SCSI interface emulation.
- The above mentioned simple DOS 2.20 emulation only works with DOS 2.20
- ROMs and on disk drives. The last restriction is a result of the DOS
- 2.20 ROMs themselves that can only operate via the sector I/O routines
- in the original diskROM (you need this one too for DOS 2.20 to work).
-
- Bugs fixed:
-
- [ We've fixed a LOT of bugs and we didn't keep an exhaustive log of
- what we did or didn't (sorry :-( so this list is far from complete ]
-
- ■ Symptom:
- We received a lot of bug reports on especially F1 Spirit that wasn't
- working like it should. When we fixed this bug it did work. Many
- other programs probably suffered from this bug too.
- Technical explanation:
- The code contained two wrong memory referencing instructions causing
- the emulation code to write in MSX memory.
- This caused some very unpredictable and confusing results. Some
- people didn't suffer from the problem. Some did, but not always and
- some people didn't get any program running at all.
- ■ Symptom:
- Got some programs working like Riverraid and Zoids.
- Technical explanation:
- Fixed emulation of Z80A IM 2 mode.
- ■ Weird timing problems on fast machines (80486DX2-66, Pentium) fixed.
- On fast machines the MSX (without /T) wasn't running at 100% but
- much faster.
- ■ Sprites appearing in the corner regions of the screen while they
- shouldn't are now gone
- ■ Better error handling at startup
- ■ Better keyboard handling. E.g. CapsLock
- ■ Added some more inofficial Z80A instructions. We now think we've got
- 'm all (or at least nearly all of them :-)
- ■ MSXDUMP.COM now works correctly with commandline parameters
- ■ Extra program to fetch ROM files. the GETROM.BAS program still had
- some problems.
- ■ Soundcard detection routines turned the CD-ROM drive LED on when
- using a soundcard with a CD-ROM connected to it. Probably fixed.
- ■ Better print routines and detection for running PRINT.COM print
- jobs.
- ■ Doing a LOAD "" in BASIC on a directory would caus the emulator to
- lock up. This is in fact a MS-DOS bug but we worked around it
- ■ Sound routines fixed and rewritten
- ■ Optimized some code for 80486.
- ■ and a lot more....
-
- What's new:
-
- ■ Telephone number of main support BBS and E-mail address have changed
- ■ MSX-2 emulation (that's a huge one !)
- ■ Both 'Sony' and 'Philips' memory/slot layouts selectable: /S switch
- ■ SCC now both in slot 1 and 2.
- ■ DOS 2.20 emulation. BUT: only with DOS 2.20 ROMs and only on disks:
- /2 switch
- ■ MSX keypad (not on all MSX keyboards) emulation via numerical keypad
- ■ Activating NumLock with the [NumLock] key enables numeric keypad
- cursor keys (and disables the MSX keypad emulation for 8, 6, 2, 4).
- Most keyboards don't support pressing two or more (cursor) keys at
- once. This is very irritating in games when two or more cursor keys
- have to be pressed at once. Activating NumLock and using the cursor
- keys on the numerical keypad fixes this.
- ■ Slow speed LED now on ScrollLock LED
- ■ The [Pause] key now stops the emulator temporarily (pause). Pressing
-
- 3
- [Pause] again resumes it.
- ■ Slight speedup of megaROM emulation
- ■ Updated documentation. More addresses, BBS's, etc.
- ■ New commandline switch /P, /5, /N, /G and /Y
- ■ With shift-alt you can make a screendump to MSX2PICT.BMP .
- ■ Some people had problems with their VGA card: with the new /U option
- only standard VGA modes are used.
- ■ With the /W command line option you can save PSG-music to a file.
- Players are coming up soon. This fileformat is compatible with the
- format of Marat F.
- ■ With the /I command line option you can use .DDI files as drive A:.
- ■ By pressing Shift and Alt, a screendump is made (MSX2PICT.BMP). This
- only works in the 256/512 resolution modes (NOT with the /U option).
-
- Known bugs:
-
- ■ Using DOS valid device names like CON, PRN, AUX, etc is not trapped
- properly in high level disk I/O mode. Doing a
- COPY filename CON
- in the emulator will dump <filename> to stdout of DOS.
- ■ It's possible that the diskdrive rotation speed has to be adjusted
- for some disk formats in low level disk I/O mode.
- ■ GETALLO does not return ALL parameters (impossible in some
- situations).
- ■ The low level disk I/O routines have been optimized to read/write
- more sectors at a time. It's possible that this doesn't work on all
- BIOS-es. We've had this experience with another program. Please
- report on this if you have any problems.
- ■ Some old konami's such as tennis and hypersports act real slow in
- the intro-screen but do work when you wait for the game.
- ■ Bug in VDP copy-commands (sometimes the requested data is not copied
- completely)
-
- Not working (yet):
-
- ■ The mouse emulation still doesn't work. We've tried several methods
- and one did work for programs that seem to do the same thing as the
- BIOS does, but others (like EASE) don't work.
- Because we've tried several methods the current method doesn't work
- at all. We will fix this later.
- ■ The keyboard is fixed on a international or USA keyboard layout.
- ■ Magnified sprites (bit 0 in VDP register 1) not implemented.
- ■ Sound emulation is not completely finished:
- ■ PSG envelopes won't work
- ■ Incomplete MSX-AUDIO/Philips Music Module support (no sample-ram).
- ■ SCC emulation doesn't support samples and it doesn't sound like we
- would
- want it to.
- ■ Joystick support not finished yet
- ■ Sprites in screen 6 and 7
- ■ VDP status register 0 bits 0-4 : fifth/ninth spritenumber
- ■ PSG register 14 bits 0 to 5 (joystick/mouse)
- ■ PSG register 15 bits 5 & 4 (puls 1, puls 2: joystick/mouse)
-
- Not emulated (mostly because it's not necessary/usefull):
-
- ■ PPI-poort &HAB is not emulated (no use to emulate: can't be changed
- in MSX architecture).
- ■ VDP status register 1 bit 7,6 (FL,LPS): lightpen
- ■ VDP status register 2 bit 1 (EO): display field flag
- ■ VDP status register 3,4,5,6: sprite collision location, lightpen
- ■ VDP register 8 bit 7,6,4,0 (MS,LP,CB,BW): color-bus settings
- ■ VDP register 9 bit 5,4,3,2,1,0 (S1,S0,IL,EO,NT,DC): various settings
- ■ VDP register 18: display adjust register
- ■ VDP register 19 does not work in screen 0,1,2 and 3
- ■ Hardware tile function (sprites/background in screen 6)
- ■ PSG register 7 bit 7,6 (port-direction (CAN'T be changed in MSX
- architecture)
- ■ PSG register 14 bit 6 (keyboardmode)
- ■ PSG register 15 bit 7 (kana led)
- ■ Tape support is not working properly because of new timing
-
-
- Programs that don't work properly (yet) as we know of:
-
- ■ Space manbow : weird behaviour. There are more than 1
- splitscreen-points on the screen
- ■ Breaker : garbage on the screen (VDP copy-command bug)
- ■ Quarth : garbage on screen (VDP copy-command bug)
- ■ Baseball : pitcher-sprites are not displayed correctly
- ■ King's Valley 2 : crashes during game
- ■ T. of Usas : sprites are nog displayed correctly
- ■ Unkn. reality : problems with split-screen emulation
- ■ Aleste : Another VDP copy bug problem
-