Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.sys.apple2.programmer > #2131

Re: cc65: ca65 + ld65 without all the library crap for "pure" assembly programs

Show all headers | View raw

Aaand I've already run into the dreaded linker "Range error" ...

; The operator '*' is buggy. This will generate a bogusBogus link error:
; ld65: Error: Range error in module `link_bug.s', line 3

    __MAIN = $1000      ; Apple DOS 3.3 binary file 4 byte prefix header
    .word __MAIN        ; 2 byte BLOAD address
    .word __END - *     ; 2 byte BLOAD size
    .org  __MAIN        ; .org must come after header else offsets are wrong
    RTS
__END:


*sigh*

Here is how to fix it:

; Solution 1 is to a pad dummy byte onto the end
;     __END:
;     .asciiz ""
; Solution 2 is to not use the buggy '*' operator
;    .word __END - __MAIN

    __MAIN = $1000      ; Apple DOS 3.3 binary file 4 byte prefix header
    .word __MAIN        ; 2 byte BLOAD address
    .word __END - *     ; 2 byte BLOAD size
    .org  __MAIN        ; .org must come after header else offsets are wrong
    RTS
__END:

"Good news everyone!"

With the buggy '*' operator work-around we can finally use a macro to set the high bit on Apple text.

.macro ASC text
    .repeat .strlen(text), I
    .byte   .strat(text, I) | $80
    .endrep
.endmacro

i.e.

MSG:
            ASC "Hello world, Apple!"
            .byte $00

I've updated barebones.s documenting the bugs and work-arounds:
https://github.com/Michaelangel007/cc65/blob/master/apple2/barebones.s

Back to comp.sys.apple2.programmer | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

cc65: ca65 + ld65 without all the library crap for "pure" assembly programs michael.pohoreski@gmail.com - 2016-01-15 21:26 -0800
  Re: cc65: ca65 + ld65 without all the library crap for "pure" assembly programs michael.pohoreski@gmail.com - 2016-01-16 09:24 -0800
  Re: cc65: ca65 + ld65 without all the library crap for "pure" assembly programs michael.pohoreski@gmail.com - 2016-01-16 16:13 -0800
  Re: cc65: ca65 + ld65 without all the library crap for "pure" assembly programs ol.sc@web.de (Oliver Schmidt) - 2016-01-19 19:36 +0000
    Re: cc65: ca65 + ld65 without all the library crap for "pure" assembly programs michael.pohoreski@gmail.com - 2016-01-19 22:54 -0800
      Re: cc65: ca65 + ld65 without all the library crap for "pure" assembly programs michael.pohoreski@gmail.com - 2016-01-20 07:21 -0800

csiph-web