Radio Shack TRS-80 Service Manual page 6

MEMORY MAP
Hex Address
C000 - FFFF
9000 - BFFF
4000 - 8FFF
0100 - 3FFF
0080 - 00FF
0015 - 007F
0014
0013
0012
0011
0010
000F
000E
000D
000C
000B
000A
0009
0008
0007
0006
0005
0004
0003
0002
0001
0000
16K ROM (only 8K used)
16K I/O Slot (Keyboard and VDG control)
16K RAM (4K - 20K used)
Not Used
RAM internal to the 6803
Not Used
RAM Control Register
Not Used
Not Used
Not Used
Not Used
Port 3 Control and Status Register
Input Capture Register (low byte)
Input Capture Register (high byte)
Output Compare Register (low byte)
Output Compare Register (high byte)
Counter (low byte)
Counter (high byte)
Timer Control and Status Register
Not Used
Not Used
Not Used
Not Used
Miscellaneous I/O Data Register
Keyboard Output Lines
Data Direction Register for miscellaneous I/O
Data Direction Register for keyboard lines
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