Omron C500-ASC04, Руководство по эксплуатации

Страница: 135 / 154

127
Appendix E
Memory Map
This appendix provides the memory map of the ASCII Unit.
Memory Area Base
Address
Remarks
I/O area 1 &H0000 This area is for internal ports of the microprocessor 63B03.
System work area &H0020 This area is used by the system.
Assembly language program area &H2000 Stores assembly language program. The size of this area can be
changed with MSET command.
BASIC Text area --- Stores intermediate language codes of BASIC program. The size of
this area can be changed with the MSET command.
System stack area --- Stack area used by the system.
Character string area --- Stores character strings. The size of this area is normally 200 bytes,
but can be changed with the CLEAR command.
Common memory area or the
Data Section &H8000 RAM area for interfacing between ASCII Unit and PC. When this area
is accessed, an I/O UNIT ERROR may occur. Do not access this area.
I/O area 2 &H9000 Area to which ports ACIA, PTM, and RTC are assigned.
System area &HA000 This is the ROM area.
Port Address Assignments
Address R/W Contents System
Default Value
$0010 R/W Transfer rate/mode control register $34
$0011 R/W TX/RX control status register $001
$0012 R Receive data register None
$001
3
W Transmit data register None
$9400 R Status register None
$9400 W Control register $11
$9401 R Receive data register None
$9401 W Transmit data register None