adapted SCREEN rioutine to MEGA65 native mode

src/kernal/board_m65/mega65_imports.s

@@ -34,6 +34,9 @@
 .label wait_x_bars                     = KERNAL_0.wait_x_bars
 .label viciv_unhide                    = KERNAL_0.viciv_unhide
 
+.label m65_scrtab_txtwidth             = KERNAL_0.m65_scrtab_txtwidth
+.label m65_scrtab_txtheight            = KERNAL_0.m65_scrtab_txtheight
+
 #if CONFIG_IEC
 
 .label iec_set_idle                    = KERNAL_0.iec_set_idle

src/kernal/screen/screen.s

@@ -15,6 +15,8 @@
 
 SCREEN:
 
+#if !ROM_LAYOUT_M65
+
 	// There are only 2 sane ways to implement this routine,
 	// I hope this one is different than what Commodore picked :)
 
@@ -22,3 +24,29 @@ SCREEN:
 	ldx #40 // 40 rows
 
 	rts
+
+#else
+
+	php
+	jsr M65_ISMODE65
+	bcc !+
+
+	plp
+
+	ldy #25 // 25 columns
+	ldx #40 // 40 rows
+
+	rts
+!:
+	plp
+	pha
+	ldy M65_SCRMODE
+
+	ldx m65_scrtab_txtwidth, y
+	lda m65_scrtab_txtheight, y
+	tay
+
+	pla
+	rts
+
+#endif

src/kernal/screen_m65/mega65_screen_table_height.s

@@ -0,0 +1,9 @@
+// #LAYOUT# M65 KERNAL_0 #TAKE
+// #LAYOUT# *   *        #IGNORE
+
+
+m65_scrtab_txtheight:        // height of the text screen
+
+	.byte 25
+	.byte 25
+	.byte 50

src/kernal/screen_m65/mega65_screen_table_width.s

@@ -0,0 +1,9 @@
+// #LAYOUT# M65 KERNAL_0 #TAKE
+// #LAYOUT# *   *        #IGNORE
+
+
+m65_scrtab_txtwidth:         // width of the text screen (logical width is always set to 80)
+
+	.byte 40
+	.byte 80
+	.byte 80

src/kernal/screen_m65/mega65_screen_tables.s

@@ -8,18 +8,6 @@ m65_scrtab_vic_ctrlb:        // parameters for VIC control register B
 	.byte %10100000 // 80x25 + extended attributes
 	.byte %10100100 // 80x50 + extended attributes
 
-m65_scrtab_txtwidth:         // width of the text screen (logical width is always set to 80)
-
-	.byte 40
-	.byte 80
-	.byte 80
-
-m65_scrtab_txtheight:        // height of the text screen
-
-	.byte 25
-	.byte 25
-	.byte 50
-
 m65_scrtab_viewmax_lo:       // maximum allowed viewport start - low byte
 
 	.byte $B0