>IE0 is to enable/disable interrupts from a lightpen/mouse connected to the
>v9938/58. However, in the MSX system the mouse is read through the PSG and a
>lightpen is most of the time not connected (you'll have to solder on your
>VDP to do that... there is no connector for it).
Any further info on MSX lightpen?
>On MSX it is #FF by default. However, this is not specified in the MSX
>system (in fact IM1 is the only official interrupt-mode, although IM2 can be
>used too) so it can actually have any value because of a distortion or so...
>All programs should fill the entire area from I*256 to (I+1)*256 (INCLUDING
>the last byte!!!)... If you are programming an application for MSX you
>should do that too (or simply hook the adress of IM1 (=#38) in
>Dos-environment). If you are writing an emulator you can always assume #FF.
*BEWARE LAURENS*: BrMSX will support spurious -however accurate- bus values
on IM2 acknowledge cycles, with presets for the most common MSX models 8;)
Kiss you lot.
MARK 2
****
MSX Mailinglist. To unsubscribe, send an email to [EMAIL PROTECTED] and put
in the body (not subject) "unsubscribe msx [EMAIL PROTECTED]" (without the
quotes :-) Problems? contact [EMAIL PROTECTED] (www.stack.nl/~wiebe/mailinglist/)
****
