At this time, Applicon's software was written entirely in DEC's assembler language.
Programming the letter font subroutines was via assembler language.
Programming of this minicomputer was via assembler language.
When a programmer uses an assembler language, he uses mnemonic instruction names and symbolic addresses.
He coded it in 6502 assembler language, fitting into about 1 kilobyte.
I remember programming 8080, Z80, 8086 and 6502 in assembler language (actually both machine language and assembler).
For maximum efficiency all calculations were programmed using the assembler language supplied with the hardware.
The C programming language is best described as a hardware-independent assembler language.
Basic assembler language did not support macros.
The following assembler language "wrap around" provides the minimum acceptable error handling capability.