more work on Z80 support

src/zvm_m65/z80_table_gen.s

@@ -1,2 +1,55 @@
 
-; XXX: move ALL table generation here, for some tables (DAA) use floor/ceiling RAM
+;
+; Z80 emulator - precalculated data generator
+;
+
+z80_table_gen:
+
+	jsr PRIMM
+	!pet $0D, "Generating CPU tables... "
+	!byte 0
+
+	;
+	; Generating:   z80_atable_mi_bank0, z80_atable_hi_bank0
+	; Dependencies: NONE
+	;
+
+	ldx #$00
+	
+@loop_atable_bank0:
+	
+	cpx #$E0
+	bcs @common_addr
+	
+	; Memory area $0000-$DFFF - maps to $02000-$0FFFF - 56KB
+
+	lda #$04
+	sta z80_atable_hi_bank0, x
+	txa
+	clc
+	adc #$20
+	sta z80_atable_mi_bank0, x
+
+@common_addr:
+	
+	; Memory area $E000-$FFFF - maps to $4E000-$4FFFF - 8KB
+	
+	lda #$04
+	sta z80_atable_hi_bank0, x
+	txa
+	sta z80_atable_mi_bank0, x	
+	
+	inx
+	bne @loop_atable_bank0
+
+	; XXX add more tables here
+
+	;
+	; The END
+	;
+
+	jsr PRIMM
+	!pet "done", $0D, $0D
+	!byte 0
+	
+	rts