some batch file cleanup

bin/build.bat

@@ -1,5 +1,9 @@
 @echo off
-echo Open Watcom v2 build script for DOS, Win32 and OS/2
+echo (Open) Watcom build script for DOS, Win32 and OS/2
+
+if not exist DOS\NUL md DOS
+if not exist OS2\NUL md OS2
+if not exist WIN32\NUL md WIN32
 
 echo Building DOS executable...
 wcl -bt=dos -q -0 -os -s -ml -fe=dos\asm6502.exe ..\src\asm6502.c
@@ -9,3 +13,5 @@ wcl386 -q -os -s -fe=win32\asm6502.exe ..\src\asm6502.c
 
 echo Building OS/2 executable...
 wcl386 -l=os2v2 -q -os -s -fe=os2\asm6502.exe ..\src\asm6502.c
+
+if exist asm6502.obj del asm6502.obj

pkg/dist/_src/atarivcs/build.bat

@@ -1,4 +1,9 @@
-@rem Build script for the C64 hello world example
+@rem Build script for the Atari VCS hello world example
 @rem Procudes the program HELLOVCS.BIN and a listing HELLOVCS.LST
 
-..\..\asm6502.exe hellovcs.a65 -o hellovcs.bin -l hellovcs.lst
+@echo.
+@echo     Make sure to adjust the path to ASM6502.EXE or
+@echo     the following command will fail!!
+@echo.
+
+asm6502.exe hellovcs.a65 -o hellovcs.bin -l hellovcs.lst

pkg/dist/_src/c64/build.bat

@@ -1,4 +1,9 @@
 @rem Build script for the C64 hello world example
 @rem Procudes the program HELLOC64.PRG and a listing HELLOC64.LST
 
-..\..\asm6502.exe helloc64.a65 -o helloc64.prg -l helloc64.lst
+@echo.
+@echo     Make sure to adjust the path to ASM6502.EXE or
+@echo     the following command will fail!!
+@echo.
+
+asm6502.exe helloc64.a65 -o helloc64.prg -l helloc64.lst

pkg/svardos/src/atarivcs/build.bat

@@ -1,4 +1,4 @@
-@rem Build script for the C64 hello world example
+@rem Build script for the Atari VCS hello world example
 @rem Procudes the program HELLOVCS.BIN and a listing HELLOVCS.LST
 
 ..\..\asm6502.exe hellovcs.a65 -o hellovcs.bin -l hellovcs.lst