User`s guide

13
MTX+REMEMOrizer logical memory map, as seen in RELCPMH=1 mode :-
0x0000..0x3fff 0x4000..0x7fff 0x8000..0xbfff 0xc000..0xffff P3,P2,P1,P0
δ ** γ ** β ***
α ***
0
a b c
1
d e f
2
g h i
3
j k l
4
m n o
5
p q r
6
s t
7
8
9
A
B
C
D
E
any SRAM any SRAM
F
In RAM page 15, it is possible to address any 16KB page of SRAM. Which page is visible at
0x4000..0x7fff is controlled by page register 1 (port 0xd0), and which page is visible at 0x8000..0xbfff
is controlled by page register 2 (port 0xd1).
REMEMOrizer SRAM physical memory map :-
Address Content
0x00000..0x03fff
RAM page α ***
0x04000..0x07fff
RAM page β ***
0x08000..0x0bfff
RAM page γ **
0x0c000..0x0ffff
RAM page δ **
0x10000..0x1ffff
virtual cassette area, read/write tape
0x20000..0x2ffff
virtual cassette area, read only tape
0x30000..0x7ffff
RAM pages a to t, RAM Disc area
This physical map is shown as it is what you see through the "any SRAM" windows in the normal
memory map, when you set the page registers appropriately.
PATCHABLE ROMS
Note that although REMEMOrizer provides images of ROMs, and although ROM stands for Read-
Only Memory, there is in fact a backdoor allowing programs such as REZPATCH.COM to unprotect
ROMs, write to them, and then protect them again.