fix more linking issues

Make TABLES appear before __MERGED by introducing a fake symbol in the TABLES section
in the first file that goes into linking (TMap.asm[060] needs to be first,
because it has all the startup code.)
This works around a bug where vlink would place _LinkerDB (the symbol that all
base-relative data addressing is relative to) into the last BSS section (formalery
TABLES) instead of __MERGED. Now __MERGED is encountered after TABLES and thus
_LinkerDB ends up in the right one.

Define _custom as absolute global symbol. This way we don't need to link against
amiga.lib

Sorgenti/TMap.asm

@@ -44,7 +44,7 @@
 
 ;* Inizio del programma ********************************
 
-
+_start
 		movem.l	d0-d7/a0-a6,-(sp)
 
 		GETDBASE
@@ -1152,7 +1152,12 @@ PaletteRGB32	dc.l	$01000000
 		dc.l	0
 
 ;***************************************************************************
+	section	TABLES,bss
+
+	xdef stupid
+stupid	ds.l 1
 
+;***************************************************************************
 	section	__MERGED,bss
 
 	xdef	ChunkyPointer,ChunkyBuffer,Yoffset
@@ -1300,7 +1305,6 @@ Palette		ds.b	256*3
 RedPalette	ds.b	256*3
 
 		cnop	0,4
-
 	end
 
 

Sorgenti/TMap.asm060

@@ -45,7 +45,7 @@
 
 ;* Inizio del programma ********************************
 
-		
+_start
 		movem.l	d0-d7/a0-a6,-(sp)
 
 		GETDBASE
@@ -1166,6 +1166,11 @@ PaletteRGB32	dc.l	$01000000
 		ds.l	256*3
 		dc.l	0
 
+;***************************************************************************
+	section	TABLES,bss
+	xdef stupid
+stupid	ds.l 1
+
 ;***************************************************************************
 
 	section	__MERGED,BSS

Sorgenti/TMapMain.asm

@@ -2280,5 +2280,9 @@ GlobalSound10	ds.l	1	;Pun. al global sound 10
 
 		cnop	0,4
 
+; define our own _custom symbol to not have to link against amiga.lib
+		org 0xDFF000
+		xdef _custom
+_custom		ds.l	1
 
 	end

Sorgenti/TMapMain.demo

@@ -2280,5 +2280,9 @@ GlobalSound10	ds.l	1	;Pun. al global sound 10
 
 		cnop	0,4
 
+; define our own _custom symbol to not have to link against amiga.lib
+		org 0xDFF000
+		xdef _custom
+_custom		ds.l	1
 
 	end