User`s manual

One-Line Assembler/ Disassembler

4-13

Entering Branch Operands

In the case of forward branches, the absolute address of the

destination may not be known as the program is being entered. You

may temporarily enter an asterisk (*) for branch to self in order to

reserve space. After the actual address is discovered, the line

containing the branch instruction can be re-entered using the

correct value.

Branch operands are interpreted as signed hexadecimal numbers.

Assembler Output/Program Listings

Obtain a listing of the program with either the MD command or DS

command.

MD ADDR[:COUNT | ADDR] ;DI

DS ADDR[:COUNT | ADDR]

Both MD and DS commands require the starting address to be

entered in the command line. When the MD command is invoked

with the DI option, the number of instructions disassembled and

displayed is equal to the line count. The line count parameter is

optional and defaults to the eight instructions displayed.

To obtain a hardcopy listing of a program, use the PA (Printer

Attach) command to activate the printer port, and then use MD to

display the listing on the terminal and print it on the printer.

Note again, that the listing may not correspond exactly to the

program as entered. As discussed in the section on the

Disassembled Source Line, the disassembler displays in signed

hexadecimal any number it interprets as an offset from a register;

all other numbers are displayed in unsigned hexadecimal.