] > ] - the pause key is disabled using some yet unknown mechanism
] > Nop. Pause key stays enabled.
] >
] > ] - pressing pause messes things up, but the disk I/O routine can recover
] > Nop. Pressing pause indeed messes things up, but the disk I/O routine can
] NOT
] > recover. So in the end you will get an error message like 'Disk I/O error'
] > under BASIC. Or 'Error reading disk, Abort, Retry or Ignore' under DOS.
]
] Hmmm... it's strange.
] On my Sanyo MSX2+, when I press the PAUSE key while loading from disk etc.
] it doesn't pause the computer. It pauses AFTER the diskaccess... Strange,
] because it's still a hardware-pause.
]
] Same goes for turboR???
I have just tried it on my MSX turbo R and indeed, it seems like the pause is
postponed until an entire sector is read. Even in Z80 mode. I should have
tried it before sending my previous message...
I have also checked the MSX turbo R datasheets. The pause key does not go
straight to the Z80. Instead, it goes to the S1990. Which is also connected
to some control lines of the floppy disk controller. And the Z80 gets the
wait signal from the S1990. So it seems that the S1990 does not pause the Z80
as long as the floppy disk controller is busy.
Interesting to see what would happen with an external floppy disk interface.
The S1990 can not know when an external diskrom accesses an external floppy...
Is there anybody living near Brussel, near Leiden or near Horn (in Limburg,
NL), who has an external floppy interface, so we can test it?
Kind regards,
Alex Wulms
--
Alex Wulms/XelaSoft - MSX of anders NIX - Linux 4 ever
See my homepage for info on the *** XSA *** format
http://www.inter.nl.net/users/A.P.Wulms
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