FFFF Top of memory X
X
X
F000 ROM MM52164 IC20 X
E000 Reserved -Disk Operating System
X
X
D000 ROM MM52132 IC21 X
X
X
C000 ROM MM52164 IC20 X
X
BC00 Empty X
B800 VIA 6522 IC1 X
B400 Extension PL8 X
B000 PPI INS8255 IC25 X
X
X
A000 ROM MN52132 IC24 X
X
9800 Empty X
9400 RAM 2114 ICs 32&33 X
9000 RAM 2114 ICs 34&35 X
8C0O RAM 2114 ICs 36&37 X
8800 RAM 2114 ICs 38&39 X
8400 RAM 2114 ICs 40&41 X
8000 RAM 2114 ICs 42&43 X
3C00 For RAM expansion off board
3800 RAM 2114 ICs 18&19 X
3400 RAM 2114 ICs 16&17 X
3000 RAM 2114 ICs 14&15 X
2C00 RAM 2114 ICs 12&13 X
2800 RAM 2114 ICs 10&ll X
0400 Reserved for Eurocards
0000 RAM 2114 ICs 51&52 X
Any memory access to an address indicated by an x will cause IC5 to generate an 'on card' signal, and disable the off card address and data bus buffers.