Merge pull request #2447 from ops/helloworld

Add sample assembly program for Commodore machines

samples/cbm/Makefile

@@ -80,17 +80,19 @@ ifneq ($(filter disk samples.%,$(MAKECMDGOALS)),)
   C1541 ?= c1541
 endif
 
-DISK_c64 = samples.d64
+DISK_$(SYS) = samples.d64
 
 EXELIST_c64 = \
         fire \
         plasma \
-        nachtm
+        nachtm \
+        hello
 
 EXELIST_c128 = \
         fire \
         plasma \
-        nachtm
+        nachtm \
+        hello
 
 EXELIST_cbm510 = \
         fire \
@@ -110,7 +112,7 @@ EXELIST_pet = \
         notavailable
 
 EXELIST_vic20 = \
-        notavailable
+        hello
 
 ifneq ($(EXELIST_$(SYS)),)
 samples: $(EXELIST_$(SYS))
@@ -135,6 +137,15 @@ plasma: plasma.c
 	$(CL) -t $(SYS) -O -o plasma -m plasma.map plasma.c
 nachtm: nachtm.c
 	$(CL) -t $(SYS) -O -o nachtm -m nachtm.map nachtm.c
+hello: hello-asm.s
+        # Use separate assembler ...
+	$(AS) -t $(SYS) hello-asm.s
+        # ... and linker commands ...
+	$(LD) -C $(SYS)-asm.cfg -o hello -m hello-asm.map -u __EXEHDR__ hello-asm.o $(SYS).lib
+	@$(DEL) hello-asm.o 2>$(NULLDEV)
+        # ... or compile & link utility
+#	$(CL) -C $(SYS)-asm.cfg -o hello -m hello-asm.map -u __EXEHDR__ hello-asm.s
+
 
 # --------------------------------------------------------------------------
 # Rule to make a CBM disk with all samples. Needs the c1541 program that comes

samples/cbm/hello-asm.s

@@ -0,0 +1,15 @@
+;
+; Sample assembly program for Commodore machines
+;
+
+        .include "cbm_kernal.inc"
+
+        ldx     #$00
+:       lda     text,x
+        beq     out
+        jsr     CHROUT
+        inx
+        bne     :-
+out:    rts
+
+text:   .asciiz "hello world!"