started MEGA65 speed handling rework, always run IEC code with disabled badlines

src/kernal/iec/iec_return.s

@@ -26,8 +26,8 @@ iec_return_success:
 	+plx_trash_a
 
 !ifdef CONFIG_MB_M65 {
-	; If in native mode, switch back to fast mode
-	jsr m65_iec_fast
+	; Restore the proper speed
+	jsr m65_speed_restore
 }
 
 	; Report success

src/kernal/iec/iec_rx_byte.s

@@ -17,8 +17,8 @@
 iec_rx_dispatch:
 
 !ifdef CONFIG_MB_M65 {
-	; If in native mode, switch to 1 MHz
-	jsr m65_iec_slow
+	; Ensure 1 Mhz mode and disabled badlines
+	jsr m65_speed_iec
 }
 
 	lda IECPROTO
@@ -33,8 +33,8 @@ iec_rx_dispatch:
 iec_rx_byte:
 
 !ifdef CONFIG_MB_M65 { !ifndef CONFIG_IEC_JIFFYDOS {
-	; If in native mode, switch to 1 MHz
-	jsr m65_iec_slow
+	; Ensure 1 Mhz mode and disabled badlines
+	jsr m65_speed_iec
 } }
 
 	; Store .X and .Y on the stack - preserve them
@@ -161,8 +161,8 @@ iec_rx_acknowledge:
 iec_rx_end:
 
 !ifdef CONFIG_MB_M65 {
-	; If in native mode, switch back to fast mode
-	jsr m65_iec_fast
+	; Restore the proper speed
+	jsr m65_speed_restore
 }
 
 	+ply_trash_a

src/kernal/iec/iec_turnaround_to_listen.s

@@ -21,8 +21,8 @@ iec_turnaround_to_listen:
 	sei
 
 !ifdef CONFIG_MB_M65 {
-	; If in native mode, switch to 1 MHz
-	jsr m65_iec_slow
+	; Ensure 1 Mhz mode and disabled badlines
+	jsr m65_speed_iec
 }
 
 	; Pull DATA, release CLK and ATN (we are not sending commands)

src/kernal/iec/iec_tx_byte.s

@@ -20,8 +20,8 @@ iec_tx_dispatch:
 	php                                ; preserve C flag for EOI indication
 
 !ifdef CONFIG_MB_M65 {
-	; If in native mode, switch to 1 MHz
-	jsr m65_iec_slow
+	; Ensure 1 Mhz mode and disabled badlines
+	jsr m65_speed_iec
 }
 
 	lda IECPROTO
@@ -41,9 +41,9 @@ iec_tx_dispatch:
 iec_tx_byte:
 
 !ifdef CONFIG_MB_M65 { !ifndef CONFIG_IEC_JIFFYDOS {
-	; If in native mode, switch to 1 MHz
+	; Ensure 1 Mhz mode and disabled badlines
 	php
-	jsr m65_iec_slow
+	jsr m65_speed_iec
 	plp
 } }
 

src/kernal/iec/iec_tx_command.s

@@ -39,8 +39,8 @@ iec_tx_command:
 	; and transmits a byte
 
 !ifdef CONFIG_MB_M65 {
-	; If in native mode, switch to 1 MHz
-	jsr m65_iec_slow
+	; Ensure 1 Mhz mode and disabled badlines
+	jsr m65_speed_iec
 }
 	clc ; Carry flag set is used for EOI mark
 	jmp iec_tx_common