Radio Shack TRS-80 Trsdos & Disk Basic Reference Manual page 177

Memory Map
Appendices
'ONBOARD"
^
MEMORY
<C
L_
EXPANSION
<S
INTERFACE
^
X'0000
1
1
K
ROM
X'0400
11
K
ROM
X'3000
I/O
X'4000
>
X'4200
X'5200
16K
RAM
X'7000
t
X'8000
16
K
RAM
X'COOO
16
K
RAM
X'FFFF
I/O
DRIVERS
AND BOOTSTRAP
LEVEL
II
BASIC/DISK BASIC
MEMORY MAPPED
I/O
BASIC
VECTORS
TRSDOS
DISK BASIC
TRSDOS
UTILITIES
USER
MEMORY
GENERAL
PURPOSE
USER
MEMORY
AUXILIARY USER
MEMORY
AUXILIARY USER
MEMORY
8-13