cleanup in multiprotocol IEC support

src/kernal/iec/iec_rx_byte.s

@@ -17,7 +17,7 @@
 iec_rx_dispatch:
 
 	lda IECPROTO
-	cmp #$01
+	cmp #IEC_JIFFY
 	beq_16 jiffydos_rx_byte
 
 	// FALLTROUGH
@@ -54,7 +54,7 @@ iec_rx_byte:
 
 	// Check if DolphinDOS was detected
 	lda IECPROTO
-	cmp #$02
+	cmp #IEC_DOLPHIN
 	bne iec_rx_no_dolphindos
 
 	// For DolphinDOS just fetch the byte from parallel port

src/kernal/iec/iec_tx_byte.s

@@ -19,7 +19,7 @@ iec_tx_dispatch:
 
 	php                                // preserve C flag for EOI indication
 	lda IECPROTO
-	cmp #$01
+	cmp #IEC_JIFFY
 	bne !+
 
 	plp
@@ -71,7 +71,7 @@ iec_tx_common:
 
 	// Check if DolphinDOS was detected
 	lda IECPROTO
-	cmp #$02
+	cmp #IEC_DOLPHIN
 	bne iec_tx_no_dolphindos
 
 	// For DolphinDOS just push the byte to parallel port (set it to output first)

src/kernal/iec/load_iec.s

@@ -107,12 +107,12 @@ load_iec:
 	lda IECPROTO
 
 #if CONFIG_IEC_JIFFYDOS
-	cmp #$01
+	cmp #IEC_JIFFY
 	beq_16 jiffydos_load               // branch if JiffyDOS
 #endif
 
 #if CONFIG_IEC_DOLPHINDOS
-	cmp #$02
+	cmp #IEC_DOLPHIN
 	beq_16 dolphindos_load             // branch if DolphinDOS
 #endif
 

src/kernal/iec_fast/dolphindos_detect.s

@@ -56,7 +56,7 @@ dolphindos_detect_success:
 
 	// Protocol detected
 
-	lda #$02
+	lda #IEC_DOLPHIN
 	sta IECPROTO
 
 	rts

src/kernal/iec_fast/dolphindos_load.s

@@ -76,7 +76,7 @@ dolphindos_load_loop:
 	jsr iec_update_EAL_by_Y
 
 	// Restore proper IECPROTO value
-	lda #$02
+	lda #IEC_DOLPHIN
 	sta IECPROTO
 
 	// End of load loop

src/kernal/iec_fast/jiffydos_detect.s

@@ -33,12 +33,12 @@ jiffydos_detect_loop:
 	lda IECPROTO
 	bpl jiffydos_detect_end            // no detection requested, preserve existing protocol
 
-	lda #$00                           // normal protocol
+	lda #IEC_NORMAL                    // normal protocol
 	beq jiffydos_store_proto           // branch always
 
 jiffydos_detected:
 	jsr iec_wait_for_data_release      // guessed from VICE logs
-	lda #$01                           // JiffyDOS protocol
+	lda #IEC_JIFFY                     // JiffyDOS protocol
 
 	// FALLTROUGH
 

src/kernal/iec_fast/jiffydos_load.s

@@ -145,7 +145,7 @@ jiffydos_load_end:
 	sta C3PO
 
 	// Restore proper IECPROTO value
-	lda #$01
+	lda #IEC_JIFFY
 	sta IECPROTO
 
 #if CONFIG_IEC_JIFFYDOS_BLANK

src/kernal/iec_fast/jiffydos_rx_byte.s

@@ -102,7 +102,7 @@ jiffydos_rx_byte_end:
 	sta C3PO
 
 	// Restore proper IECPROTO value
-	lda #$01
+	lda #IEC_JIFFY
 	sta IECPROTO
 
 	// Re-enable sprites

src/kernal/iec_fast/jiffydos_tx_byte.s

@@ -83,7 +83,7 @@ jiffydos_tx_byte_finalize:
 	sta CIA2_PRA
 
 	// Restore proper IECPROTO value
-	lda #$01
+	lda #IEC_JIFFY
 	sta IECPROTO
 
 	// Re-enable sprites and interrupts