MEGA65 native mode fixes

src/basic/basic_commands/cmd_go_goto_run.s

@@ -32,7 +32,7 @@ cmd_go_syntax_error:
 	// If in native mode - switch to C64 compatibilty
 
 	jsr M65_ISMODE65
-	bne cmd_go_rts
+	bcs cmd_go_rts
 
 	jsr helper_ask_if_sure
 	bcs cmd_go_rts
@@ -45,21 +45,12 @@ cmd_go_syntax_error:
 	// If in C64 compatibility mode - switch to native mode
 
 	jsr M65_ISMODE65
-	beq cmd_go_rts
+	bcc cmd_go_rts
 
 	jsr helper_ask_if_sure
 	bcs cmd_go_rts
 	jsr M65_MODE65
-	// XXX test code, replace by jmp do_clr
-
-	jsr do_clr
-
-	lda #$41
-	jsr JCHROUT
-testx:
-	jmp testx
-
-
+	jmp do_clr
 !:
 	jmp do_ILLEGAL_QUANTITY_error
 

src/basic/basic_commands/cmd_sys.s

@@ -27,7 +27,7 @@ cmd_sys:
 	// Make sure we are in C64 compatibility mode
 
 	jsr M65_ISMODE65
-	bne cmd_sys_nsys_common
+	bcs cmd_sys_nsys_common
 	jsr M65_MODE64
 
 	// FALLTROUGH

src/kernal/extapi_m65/mega65_ismode65.s

@@ -2,7 +2,7 @@
 // #LAYOUT# *   *        #IGNORE
 
 
-M65_ISMODE65: // checks if mode is native M65 one, BEQ = jump if native mode
+M65_ISMODE65: // checks if mode is native M65 one, BCC = jump if native mode
 
 	pha
 
@@ -14,6 +14,16 @@ M65_ISMODE65: // checks if mode is native M65 one, BEQ = jump if native mode
 	bne !+
 	lda M65_MAGICSTR+2
 	cmp #$35 // '5'
+	bne !+
+
+	// M65 native mode
+
+	clc
+	pla
+	rts
 !:
+	// C64 compatibility mode
+
+	sec
 	pla
 	rts

src/kernal/screen/chrout_screen.s

@@ -13,7 +13,7 @@ chrout_screen:
 #if ROM_LAYOUT_M65
 
 	jsr M65_ISMODE65
-	beq_16 m65_chrout_screen
+	bcc_16 m65_chrout_screen
 
 #endif
 

src/kernal/screen_m65/mega65_chrout_screen.s

@@ -37,35 +37,35 @@ m65_chrout_screen_literal: // entry point for m65_chrout_screen_quote
 	phz
 	ldz M65__TXTCOL
 
-	// Start from setting M65_SCRSEG to point colour memory (starts from $FF80000)
+	// Start from setting M65_LPNT_SCR to point colour memory (starts from $FF80000)
 
 	lda #$0F
-	sta M65_SCRSEG+3
+	sta M65_LPNT_SCR+3
 	lda #$F8
-	sta M65_SCRSEG+2
+	sta M65_LPNT_SCR+2
 
 	lda M65_COLVIEW+1
-	sta M65_SCRSEG+1
+	sta M65_LPNT_SCR+1
 	lda M65_COLVIEW+0
-	sta M65_SCRSEG+0
+	sta M65_LPNT_SCR+0
 
 	// Add screen row to the address
 
 	ldy M65__TXTROW
 	clc
 	lda m65_scrtab_rowoffset_lo,y
-	adc M65_SCRSEG+0
-	sta M65_SCRSEG+0	
+	adc M65_LPNT_SCR+0
+	sta M65_LPNT_SCR+0	
 	lda m65_scrtab_rowoffset_hi,y
-	adc M65_SCRSEG+1
-	sta M65_SCRSEG+1	
+	adc M65_LPNT_SCR+1
+	sta M65_LPNT_SCR+1	
 
 	// Store the new color in screen memory
 
 	lda COLOR
 	sta_lp (M65_LPNT_SCR),z
 
-	// Now change M65_LPNT_SCRb to point to screen memory
+	// Now change M65_LPNT_SCR to point to screen memory
 
 	// XXX deduplicate this part
 	lda M65_SCRSEG+1

src/kernal/tape/tape_common_screen.s

@@ -26,7 +26,7 @@ tape_screen_on_motor_off:
 #else
 
 	jsr M65_ISMODE65
-	bne_16 screen_on                   // MEGA65 native mode does not have badlines, no need to enable/disable screen
+	bcs_16 screen_on                   // MEGA65 native mode does not have badlines, no need to enable/disable screen
 	rts
 
 #endif
@@ -52,7 +52,7 @@ tape_screen_off_motor_on:
 #else
 
 	jsr M65_ISMODE65
-	beq !+                    	       // MEGA65 native mode does not have badlines, no need to enable/disable screen
+	bcs !+                    	       // MEGA65 native mode does not have badlines, no need to enable/disable screen
 	jsr screen_off
 !: