CP/M 68: linking an C and asm file together

I've googled for this stuff for some time, but finished with reading docs. May be that will be usefull for someone else (notibly me when I will look for that once again)
dtzputs.s , implements dtzputs via calling BDOS fn 2

        text
        globl   _dtzputs
_dtzputs:
        move.l  4(sp),a1        *taking argument from stack
dtzputsl:
        move.b  (a1)+,d1        *take next char; should if be ANDed with 0x00FF ? A1 expected to be w
        cmpi.b  #0,d1
        beq     dtzputse
        move.l  a1,-(sp)        *storing string pointer to stack
        move.w  #2,d0           * calling BDOS '2'
        trap    #2
        move.l  (sp)+,a1
        bra     dtzputsl
dtzputse:
        rts

Assemble it with AS68 -L -U -S 0: dtzputs.s , get dtzputs.o
test.c ,calls dtzputs

main()
{
 dtzputs("Fuck a duck");
}

Compile it with C TEST like that:

9C>c test

9C>CP68 -I 0: TEST.C TEST.I

9C>C068 TEST.I TEST.1 TEST.2 TEST.3 -F

9C>ERA TEST.I

9C>C168 TEST.1 TEST.2 TEST.S

9C>ERA TEST.1

9C>ERA TEST.2

9C>AS68 -L -U -S 0: TEST.S

9C>ERA TEST.S

9C>

And link it

9C>clink test dtzputs

9C>LO68 -R -U_NOFLOAT -O TEST.68K 0:S.O TEST.O DTZPUTS.O .O .O .O .O .O .O .O 0:CLIB

9C>test
Fuck a duck

Quack! Quack! Quack!
The next thing to understand is how to get rid of S.O and CLIB, but it is not for today.

Some more news on SGSBCSD

Looks like I have the code working with SDHC. I'll test in in a few days and release 0.00.04/2491.
So my future plans to port it to m68k code and update 68kavr project. UPD: 2491 version of Searle Grant SBC SD interface released. It works!

Huge SGSBCSD update - 2490

A lot of bug fixes for my SD interface for Searle Grant's SBC. A loot! If anyone have it installed - update it now