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MON251 User's Guide
Introduction Theory of Operation 
Configuring MON251 
INSTALL.A51 INSTALL.BAT Troubleshooting Configuring Projects Debugging ProgramsINSTALL.BAT
The INSTALL.BAT batch file assembles and links the monitor using configuration parameters you specify on the command line. INSTALL.BAT is invoked from the command prompt using the following command-line syntax:
INSTALL { MODBIN | MODSRC } Serial-Type Data-Start [INTR2]
Where
| MONBIN | Specifies binary mode for the 251 CPU. |
| MOBSRC | Specifies source mode for the 251 CPU. |
| Serial-Type | Specifies which serial I/O routine MON251 uses (see table below). |
| Data-Start | Specifies the start address of the off-chip von-Neumann memory area that MON251 uses for internal variables (32 Bytes). The value is a HEX number between 010000H and 0FFFFE0H. |
| INTR2 | Configures the 251 CPU for 2-bytes interrupt frame size. |
Serial-Type
Serial-Type is a number which selects the serial port and baudrate used by MON51. You may modify the serial port configurations in the INSTALL.A51 file or you may create additional configurations to suit your requirements.
The following table lists the standard configurations that are pre-configured in INSTALL.A51.
| Serial Type | Serial Interface | Clock Source | Baud Rate | CPU Clock (MHz) | Processors |
|---|---|---|---|---|---|
| 0 | 0 | Timer 1 | 9600 | 11.0592 | All 251 Variants |
| 1 | 0 | Timer 2 | defined with XTAL in INSTALL.A51(default 9600 bps) | defined with XTAL in INSTALL.A51 | All 251 Variants |
| 3 | external SIO | external SIO | defined with XTAL in INSTALL.A51 (default 57600 bps) | the external SIO clock is 1,8432MHz | for MCBx51 Evaluation Board |
Example
The following command line:
INSTALL MODBIN 1 0FF7FE0H
creates MON251 with the following configuration:
- Binary Mode for the 251 CPU.
- Using serial interface 0 with timer 2 as baudrate generator.
- MON251 data space at 0FF7FE0h-0FF7FFFh.
The MON251.HEX file that is built by INSTALL.BAT must be loaed to Flash or EPROM at address 0FF0000H into your target system.
Installation on the MCBx51 Board
Use the following invocation to install MON251 on a MCBx51 Board.
Source mode using the external SIO:
INSTALL MODSRC 3 0xFEFFE0
Binary mode using the on-chip SIO:
INSTALL MODBIN 1 0xFEFFE0
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