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- ; To become familiar with the segment feature you
- ; should assemble this file with and without the
- ; single object module swicth enabled.
- ;
- ; a80z -o example ;three object module files
- ; code.seg
- ; memory.seg
- ; rom2.seg
- ;
- ; a80z example ;one object module file example.obj
-
-
-
- jp loop
- .org h'20 ;start assembly at location 20 hex.
- .segment .memory ;declare a new segmemt for ram memory
- ;allocation
- .memory ;select segment .memory as active(locaton counter)
- ;for the .code segment(created by the assembler) is
- ;saved for when we switch back.
- .org h'8000 ;assume ram space starts at address h'8000
- v1: .rs 2 ;reserve storage for a program variable
- array: .rs 100*2 ;reserve storage for an array of 100 words
- .eject ;lets start on a fresh page of paper.
- .code ;switch back to code segment
- ; origin is where we left off.
- loop: ld a,h'22
- ld sp,h'2000
- ex (sp),hl
- .equ cr,13 ;equated identifiers are constant.
- .equ tab,9
- .set temp,23 ;set identifiers may be re-set.
- .set temp,24
- .set temp,25
- .db 1,2,3,4,5,'p'
- .db 6,7,"this is a test\r\n\0"
- .dw 1,h'1234
- .drw 1,h'1234
- ld b,loop2 >> 8 ;isolate high byte of address
- ld b,loop2 & h'ff ;isolate low half of address
- .page ;start on a new 256 byte boundary.
- loop2: jp loop
- .segment .rom2
- .rom2
- .org h'4000
- .db "this is possibly a second rom programmed seperately."
- .code
- .end loop ;end of assembly, specifying start address.
-