How to play Illusion City (english) in MSX2+ turbo mode?

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By AxelStone

Prophet (2764)

AxelStone's picture

04-01-2014, 13:44

Hello everybody, I've a MSX2+ Panasonic FS-A1WSX that supports turbo mode (6Mhz aprox) by software. I'm trying to play the english translation of Illusion City, patched to work on MSX2/2+ but it goes really slow. It's supossed you need turbo mode, as my MSX2+, but I don't know how to activate it in the game.

I use MegaflashRom SCC+, and the /8 option (activate turbo mode) is not valid for DSKs, so I need to activate it manually before game loading. How can be done?

Thanks Smile

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By Meits

Scribe (6015)

Meits's picture

04-01-2014, 13:56

That would be achieved as shown in the wiki ;)

By AxelStone

Prophet (2764)

AxelStone's picture

04-01-2014, 14:00

Meits wrote:

That would be achieved as shown in the wiki ;)

Yeah I know the basic command but Illusion City is autoboot, so I have no choice yo execute the basic command to activate turbo mode B-)

By Jipe

Paragon (1394)

Jipe's picture

04-01-2014, 14:06

Tip with floppy
under basic
OUT 64,8:OUT 65,0
insert disk1
POKE&HF346,1
CALL SYSTEM

By Meits

Scribe (6015)

Meits's picture

04-01-2014, 14:33

Flash an empty DSK to the first slot of your megaflashrom...
From there, take Jipe's tip and change disk...

(hmm... never tried changing DSK in basic... Would that be possible?)

By AxelStone

Prophet (2764)

AxelStone's picture

04-01-2014, 20:48

Jipe wrote:

Tip with floppy
under basic
OUT 64,8:OUT 65,0
insert disk1
POKE&HF346,1
CALL SYSTEM

A very good try, almost works, but it freezes when the game is going to start (the floppy does not read). I've tried with megaflash and even with physical disks, but the result is the same: it makes the first read but when it's going to start the floppy doesn't read anymore Sad

By sd_snatcher

Prophet (3355)

sd_snatcher's picture

04-01-2014, 21:48

AFAIK, the translated version already activates the turbo of the Panasonic2+ machines. But the problem is that they're too slow for that game. The minimum speed to run it is a 7.14MHz Z80, and even this way it runs somewhat slow (somehow equivalent to the speed that Xak2 runs on a 3.57MHz machine).

By AxelStone

Prophet (2764)

AxelStone's picture

04-01-2014, 22:24

sd_snatcher wrote:

AFAIK, the translated version already activates the turbo of the Panasonic2+ machines. But the problem is that they're too slow for that game. The minimum speed to run it is a 7.14MHz Z80, and even this way it runs somewhat slow (somehow equivalent to the speed that Xak2 runs on a 3.57MHz machine).

Wow, I didn't know, it goes really slow even with turbo enabled. Thanks for the explanation Wink

By Daemos

Paragon (1713)

Daemos's picture

04-02-2014, 19:49

Does anyone happen to know if there is a bios call to activate the turbo on this particular machine or the ports where to out to? Or is the basic out 64,8 65,0 the same ports as in asm?

By Manuel

Ascended (16981)

Manuel's picture

04-02-2014, 21:06

Yes, it's the same.

By AxelStone

Prophet (2764)

AxelStone's picture

06-02-2014, 09:42

Finally it seems that MSX2+ is not fast enough to play Illusion City. The english translation activates turbo mode, but it goes too slow anyway. To play Illusion City you need at least One Chip MSX in 11Mhz mode.

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