Manuel Bilderbeek schreef:
> Hi!
>
> A while ago I tried to run BCF Disk Station 6 on my MSX. I got this
> diskimage from the MCCM cd Millennium. When I tried it on an emulator
> the screen was totally corrupted, due to some bugs in fMSX. When I got
> home I tried it on my SOny G900P. There I got a strange error:
> Bad file mode in 5. In line 5 there was a BLOAD command. But the file
> that should be BLOADed there, was indeed binary! I didn't get it...
>
> Now, last week, I tried it again on my Sony 700. It worked fine!
> So I took it to my Sony G900p, and again: the error.
> But (one gets creative in finding errors!) after removing my Music
> Module it worked fine!
>
> When I looked at the AUTOEXEC.BAS, I saw the following POKE command in
> it: POKE -54,35 that was only executed if a Music Module was connected
> (something like: IF INP(&HC0)<>255 THEN POKE -54,35)). This is the poke
> to let a MSX Audio emulate a MSX Music, if I'm not mistaken. I've asked
> about this POKE earlier on the Mailinglist, but then I also couldn't get
> it working on my particular Sony G900P. And indeed: when I remove this
> POKE, the BCF DiskStation 6 works fine. So it seems that this pokes
> severely affects the diskoperations! In fact, all diskoperations fail or
> do very strange after this poke! E.g. when I do: (with a Compile
> diskmagazine in drive a:)
> POKE -54,35
> CALL SYSTEM
>
> then the computer hangs after displaying "LOADING DS .... (something)"
>
> Without the POKE, it runs fine!
>
> So, what could be the cause of the fact that this poke messes up my Sony
> G900P diskrom/diskfunctions?
>
> Maybe you know it, Alwin, since you modified it?
>
> --
> Grtjs, Manuel
>
>
this poke let some software belive that there is an expanded bios on boardit just
fills in a hook.
for some software this is enough to let them belive that a msx audio bios is
peresent.
and ofcourse the msx audio music chip.
but when your msx already has an expanded bios ( maybe the rs232 , there is a lot
inside the G900P)
you can get problems.
maybe you can try to poke &hFFCA , 00 , and &hFFCB, &hC9 (nop and ret)
Erik de Boer
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