] >Of course the PAUSE key worked!!! This key is hardware implemented! I saw
] >it in a Panasonic FSA1WSX (MSX2+) and the PAUSE key access a circuit that
] >controls the clock flow. But this demands a special refresh circuit, which
] >I couldn't found, but I know this has to exist.
The MSX turbo R has special refresh circuit. On this machine, the DRAM memory
interface is build into the same chip as the R800 microprocessor. The DRAM
memory interface controls the refresh of the DRAM regardless of the Z80.
As far as I know, on other MSX systems, the memory refresh is driven by the
Z80 or the Z80 compatible processor integrated into the later models of the
MSX engine.
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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