>] > Is there some page which could tell me how all the MSX version react on
>] > an in a,(#FF). I know it shouldn't be done but I'm trying to change a
>] > program...
>]
>] In MSX turbo R and some MSX2+ machines, the upper 3 bits will always be 1.
>]
>] The value read will be the selected segment in the largest mapper in the
>] system.
>Unfortunately this is not the case on the MSX turbo R when you insert an
>external mapper with a size larger then 512kB. The MSX turbo R has
>low-impedance pull-up registers for the 3-upper bits. They pull the line up
>stronger then the average external mapper can pull the line down. Hence, the
>3-upper bits will always be 1. Even if the external mapper tries to pull one
>of those bits down to 0.
Asking in a low-profile manner... I can use something like ADDRAM (4 Mb
Mapper) into my T-R? What problems I can have, regarding to the use of an
external mapper?
Thankx, ByE!
________________________________________________________________________
Ricardo Jurczyk Pinheiro - ICQ UIN:3635907 - [EMAIL PROTECTED]|_Sola Scriptura |
http://i.am/rjp -M.Sc. Numerical Modelling (hope so!) |_ Sola Gratia |
UFF - Niteroi - RJ - Brazil - [EMAIL PROTECTED] _| Sola Fide |
MSX, ST, B5, X-F, Anime, Christian, Maths, CuD, Linux!_| Solo Cristi |
Christian, Rock, Comics, Transformers, and hate M$! | Soli Deo Gloria |
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