>F349 points to the area NOT INCLUDING MSX-DOS slot call routinesand interrupt
>handling routine. F34B points below them. So, area above F349
>must never be changed, but area between F34B and F349 can be changed if
>some precautions are taken, and MSXDOS reloaded afterwards.
In my system (DOS 2 installed on Mega-SCSI), #F34B points ALWAYS to
the same
location of #F349. If I change it, the old value is restored after
going
BASIC and returning. And if I change #F349, #F34B is automatically
modified
for equaling #F349.
So, reducing #F349 and forgetting #F34B is the only method for reserve
memory, right?
>> 2. Can I allocate memory in page 3 with the following method, without
>> causing
>> the system to be unstable?:
>>
>> I used this method before, but exiting BASIC and returning DOS after
>> modifying HIGHMEM, for causing MSXDOS2.SYS to be reloaded in the
>> appropriate
>> address. Is this really necessary?
>It IS necessary if you are palnning to run MSXDOS programs afterwards.
But can I exit BASIC AFTER having executed the previous code and
filled the
allocated area with data, or I must do it before? If I disable
interrupts and
jump to BASIC by directly jumping #4022 on the disk ROM slot (that is,
I
don't exit DOS prompt after allocating and filling area) then I should
not
have problems, right?
///// KONAMI MAN /////
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