On Sun, 21 Mar 1999, Erik wrote:
So that rumor is solved , you are allowed to read them.
The only problem is that the unused bit's of the registers can return
unexpected data.( always 1 or 0 or the data you did write to it or maybe crap)
You first have to calculate the amount of memory and
Jon De Schrijder schreef:
Laurens Holst wrote:
...
!!! GRUWEL GRUWEL !!!
-- for non-Dutch readers: !!! HORRIFYING HORRIFYING !!!
Issuing an IN on the mapper-ports is against the MSX-standard!!!
NEVER IN the Mapper-ports. The result is ABSOLUTELY unreliable and
Here i have the msx technical databook , micro$oft 5 feb. 1986 rel.6.0
It says on MSX2 memory mapper specification chapter 1 line 4
- The mapping registers are at FCH to FFH of I/O address. The are both read
and
write addresses. -
So that rumor is solved , you are allowed to read them.
The only
Laurens Holst wrote:
...
!!! GRUWEL GRUWEL !!!
-- for non-Dutch readers: !!! HORRIFYING HORRIFYING !!!
Issuing an IN on the mapper-ports is against the MSX-standard!!!
NEVER IN the Mapper-ports. The result is ABSOLUTELY unreliable and
machine/mapper-dependant. One computer inverts the
