c64os_prg_5_f.asm

unldcsum  ;--- Unload checksum.lib ---
          .block
          lda chloaded
          beq done  ;Not loaded
          
          ldx #"c" ;checksum.lib
          ldy #"h"
          lda #slunload ;Unload flag
          jsr unldlib
          
          dec chloaded ;Mark as unloaded

          clc ;Indicates a resources was potentially freed          
          rts
          
done      sec ;Indicates nothing was freed
          rts          
          .bend