Assembler Languages

• SABR –Symbolic Assembler for Binary Relocatable program
• Used by FORTRAN
• One pass, operand arithmetic is not legal.
• Assists it provides:
• Handles code crossing pages.
• Has pseudo-operator for marking code that must stay on same page.
• IF conditional assembly.
• Has linker and can create externally callable subroutine.
• Code is relocatable with addresses assigned by linker.
• Various things more useful to FORTRAN
• 4k assembler PAL-III similar to PAL8, MACRO8 added macro support.
• MACREL is linking relocatable macro assembler.
• Non DEC assemblers also existed. Ex. PAGE-8 macro assembler handles pages. More powerful.

Notes:

([ since no direct load 12 bit value