upper memory
ZXNet echo conference «zxnet.soft»
From George Valnin → To All 5 September 2000
Hello All!
* Original written in CODE.ZX
*Copied to ZX.SPECTRUM
*Copied to REAL.SPECCY
*Copied to ZXNET.SOFT
I ask competent people to soap up or throw into the echo briefly information about the numbers
ports and the assignment of bits in them to switch upper memory pages in
cars you know (KAY, Scorpion, Profi, ATM...). This is for the debugger.
Thanks in advance.
P.S.: Lamers and insecure people, please do not worry.
Best regards, George aka -=GPV=-.
From Eugene Palenock → To George Valnin 6 September 2000
Hello George!
05 Sep 00 10:57, George Valnin -> All:
GV> I ask competent people to soap up or throw into the echo briefly information about
GV> port numbers and the assignment of bits in them for switching top pages
GV> memory in machines you know (KAY, Scorpion, Profi, ATM...). This is for
GV> debugger.
I know for sure Pentagon 512 & GRM 512 - 6.7 bits #7FFD.
Scorp - 256 by 1FFD (I don’t remember the bit), but on Scorp with upper memory you need
Be careful - cans 8 and 9 cannot be touched, the screw and the shadow will die. A Scorp - 1024
- in the old version they used 1FFD bits, but in the new version it seems like
the pros have DFFD... But I’m not sure exactly.
Pro - DFFD, but there, like on ZS, there’s still a lot of stuff hanging there
ATM - they are different... For some, the memory ports are generally hidden in TRDOS...
There are many more different ATAS-256, etc. - there is BB55 and the memory is switched through 5F,7F
or 9F...
Best regards, Evgeniy.