Mc With The Power On

The PC communication program should set the IBM PC serial port to 9600 bauds, no parity. When power is applied to the programmer, the programmer will then send the on line message to the PC. At this time, the user may enter any of the programmer commands. Table 1 is a list of the available commands. Commands are executed when the letter is sent to the programmer followed by the enter or cr character (the l, d, and m commands do not need the enter). Any character other than enter or cr stops execution of the command and returns control to the command interpreter.

At this point, the programmer expects to see an d downloaded from the PC to initiate the load operation. Any characters sent after the d are ignored unless they are valid S-Records. The user should then use the communications program to send the S-Record data file to the programmer. When the data transmission is completed, the programmer sends back the starting address of the last block of data that was sent followed by the message load completed.

The download software will produce error messages for load addresses outside the F800-FFFF range, and for checksum errors. If these messages appear, there may be problems with the downloaded code. The out-of-range address can be corrected by changing the assembly source code to put the address in range. The checksum error is

Parts List for MC68701 Programmer

OTY PART #

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OTY PART #

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