User`s guide

12
REMEMORIZER MEMORY MAP MODIFICATIONS
In these pictures, ROMs are shown with their names and are 8KB in size and RAM pages are
assigned letters and are 16KB in size. RAM pages α to δ are the normal 64KB present in an
MTX512. RAM pages a to t are extra pages, which are used as 320KB of RAM Disc.
MTX+REMEMOrizer logical memory map, as seen in RELCPMH=0 mode :-
R2,R1,R0 0x0000..0x1fff 0x2000..0x3fff 0x4000..0x7fff 0x8000..0xbfff 0xc000..0xffff P3,P2,P1,P0
0
OS *
BASIC * γ ** β ***
α ***
0
1
ASSEM a δ **
1
2
c b
2
3
e d
3
4
CP/M boot ROM g f
4
5
SDX ROM **** i h
5
6
k j
6
7
m l
7
o n
8
q p
9
s r
A
t
B
C
D
E
any SRAM any SRAM
F
* These ROMs are the REMEMOrizer modified versions if the ROMs jumper is set "high", or if set
"low" the MTX motherboard is expected to provide them.
** These RAM pages are provided by REMEMOrizer if the MTX500 jumper is set "high", or if set
"low" the MTX motherboard is expected to provide 64KB RAM.
*** These RAM pages are provided by REMEMOrizer if the MTX500 jumper is set "high", and the
ROMs jumper is set "high" and REMEMOrizer notices that your MTX doesn't have any memory at all!
**** The first 6KB of this ROM contains regular SDX ROM code. The next 1KB has been stolen, and
contains virtual tape code. The last 1KB is in fact writable, and contains virtual tape variables!