diff --git a/cardBuilder.go b/cardBuilder.go
index 41a4702..7fc5039 100644
--- a/cardBuilder.go
+++ b/cardBuilder.go
@@ -24,6 +24,10 @@ type cardBuilder struct {
 
 const noCardName = "empty"
 
+var commonParams = []paramSpec{
+	{"tracess", "Trace softswitches", "false"},
+}
+
 var cardFactory map[string]*cardBuilder
 
 func getCardFactory() map[string]*cardBuilder {
@@ -31,7 +35,9 @@ func getCardFactory() map[string]*cardBuilder {
 		return cardFactory
 	}
 	cardFactory = make(map[string]*cardBuilder)
-	cardFactory["brainboard"] = newCardBrainBoardIIBuilder()
+	//cardFactory["brainboard"] = newCardBrainBoardBuilder()
+	cardFactory["brainboard2"] = newCardBrainBoardIIBuilder()
+	//cardFactory["dan2sd"] = newCardDan2ControllerBuilder()
 	cardFactory["diskii"] = newCardDisk2Builder()
 	cardFactory["diskiiseq"] = newCardDisk2SequencerBuilder()
 	cardFactory["fastchip"] = newCardFastChipBuilder()
@@ -57,9 +63,9 @@ func availableCards() []string {
 }
 
 func setupCard(a *Apple2, slot int, paramString string) (Card, error) {
-	paramsArgs := splitConfigurationString(paramString, ',')
+	actualArgs := splitConfigurationString(paramString, ',')
 
-	cardName := paramsArgs[0]
+	cardName := actualArgs[0]
 	if cardName == "" || cardName == noCardName {
 		return nil, nil
 	}
@@ -74,25 +80,29 @@ func setupCard(a *Apple2, slot int, paramString string) (Card, error) {
 	}
 
 	finalParams := make(map[string]string)
+	for _, commonParam := range commonParams {
+		finalParams[commonParam.name] = commonParam.defaultValue
+	}
 	if builder.defaultParams != nil {
 		for _, defaultParam := range *builder.defaultParams {
 			finalParams[defaultParam.name] = defaultParam.defaultValue
 		}
 	}
 
-	for i := 1; i < len(paramsArgs); i++ {
-		paramArgSides := splitConfigurationString(paramsArgs[i], '=')
+	for i := 1; i < len(actualArgs); i++ {
+		actualArgSides := splitConfigurationString(actualArgs[i], '=')
+		actualArgName := strings.ToLower(actualArgSides[0])
 
-		if _, ok := finalParams[paramArgSides[0]]; !ok {
-			return nil, fmt.Errorf("unknown parameter %s", paramArgSides[0])
+		if _, ok := finalParams[actualArgName]; !ok {
+			return nil, fmt.Errorf("unknown parameter %s", actualArgSides[0])
 		}
-		if len(paramArgSides) > 2 {
-			return nil, fmt.Errorf("invalid parameter value for %s", paramArgSides[0])
+		if len(actualArgSides) > 2 {
+			return nil, fmt.Errorf("invalid parameter value for %s", actualArgSides[0])
 		}
-		if len(paramArgSides) == 1 {
-			finalParams[paramArgSides[0]] = "true"
+		if len(actualArgSides) == 1 {
+			finalParams[actualArgName] = "true"
 		} else {
-			finalParams[paramArgSides[0]] = paramArgSides[1]
+			finalParams[actualArgName] = actualArgSides[1]
 		}
 	}
 
@@ -101,6 +111,12 @@ func setupCard(a *Apple2, slot int, paramString string) (Card, error) {
 		return nil, err
 	}
 
+	// Common parameters
+	traceSS := paramsGetBool(finalParams, "tracess")
+	if traceSS {
+		a.io.traceSlot(slot)
+	}
+
 	cardBase, ok := card.(*cardBase)
 	if err == nil && ok {
 		cardBase.name = builder.name
@@ -139,11 +155,28 @@ func paramsGetPath(params map[string]string, name string) string {
 func paramsGetInt(params map[string]string, name string) (int, error) {
 	value, ok := params[name]
 	if !ok {
-		value = "0"
+		return 0, fmt.Errorf("missing parameter %s", name)
 	}
 	return strconv.Atoi(value)
 }
 
+// Returns a 1 based array of bools
+func paramsGetDIPs(params map[string]string, name string, size int) ([]bool, error) {
+	value, ok := params[name]
+	if !ok {
+		return nil, fmt.Errorf("missing parameter %s", name)
+	}
+	if len(value) != 8 {
+		return nil, fmt.Errorf("DIP switches must be 8 characters long")
+	}
+	result := make([]bool, size+1)
+	for i := 0; i < 8; i++ {
+		result[i+1] = value[i] == '1'
+
+	}
+	return result, nil
+}
+
 func splitConfigurationString(s string, separator rune) []string {
 	// Split by comma, but not inside quotes
 	var result []string
diff --git a/cardThunderClockPlus.go b/cardThunderClockPlus.go
index b99aa13..43e2918 100644
--- a/cardThunderClockPlus.go
+++ b/cardThunderClockPlus.go
@@ -29,9 +29,8 @@ type CardThunderClockPlus struct {
 
 func newCardThunderClockPlusBuilder() *cardBuilder {
 	return &cardBuilder{
-		name:          "ThunderClock+ Card",
-		description:   "Clock card",
-		defaultParams: &[]paramSpec{},
+		name:        "ThunderClock+ Card",
+		description: "Clock card",
 		buildFunc: func(params map[string]string) (Card, error) {
 			var c CardThunderClockPlus
 			err := c.loadRomFromResource("<internal>/ThunderclockPlusROM.bin")
diff --git a/ioC0Page.go b/ioC0Page.go
index 514c6aa..13d0416 100644
--- a/ioC0Page.go
+++ b/ioC0Page.go
@@ -16,7 +16,7 @@ type ioC0Page struct {
 	joysticks           JoysticksProvider
 	mouse               MouseProvider
 	apple2              *Apple2
-	trace               bool
+	traceMask           uint16 // A bit for each 16 softswitches
 	traceRegistrations  bool
 	panicNotImplemented bool
 }
@@ -56,7 +56,16 @@ func newIoC0Page(a *Apple2) *ioC0Page {
 }
 
 func (p *ioC0Page) setTrace(trace bool) {
-	p.trace = trace
+	if trace {
+		p.traceMask = 0xffff
+	} else {
+		p.traceMask = 0x0000
+	}
+}
+
+func (p *ioC0Page) traceSlot(slot int) {
+	p.traceMask |= 1 << (8 + slot)
+	fmt.Printf("Slot %v traced %04x\n", slot, p.traceMask)
 }
 
 func (p *ioC0Page) setTraceRegistrations(traceRegistrations bool) {
@@ -110,11 +119,17 @@ func (p *ioC0Page) setMouseProvider(m MouseProvider) {
 	p.mouse = m
 }
 
+func (p *ioC0Page) isTraced(address uint16) bool {
+	ss := address & 0xff
+	return ss != 0xc000 && // Do not trace the spammy keyboard softswitch
+		(p.traceMask&(1<<(ss>>4))) != 0
+}
+
 func (p *ioC0Page) peek(address uint16) uint8 {
 	pageAddress := uint8(address)
 	ss := p.softSwitchesR[pageAddress]
 	if ss == nil {
-		if p.trace {
+		if p.isTraced(address) {
 			fmt.Printf("Unknown softswitch on read to $%04x\n", address)
 		}
 		if p.panicNotImplemented {
@@ -123,7 +138,7 @@ func (p *ioC0Page) peek(address uint16) uint8 {
 		return 0
 	}
 	value := ss()
-	if p.trace && address != 0xc000 {
+	if p.isTraced(address) {
 		name := p.softSwitchesRName[pageAddress]
 		fmt.Printf("Softswitch peek on $%04x %v: $%02x\n", address, name, value)
 	}
@@ -134,15 +149,15 @@ func (p *ioC0Page) poke(address uint16, value uint8) {
 	pageAddress := uint8(address)
 	ss := p.softSwitchesW[pageAddress]
 	if ss == nil {
-		if p.trace {
-			fmt.Printf("Unknown softswitch on write to $%04x\n", address)
+		if p.isTraced(address) {
+			fmt.Printf("Unknown softswitch on write $%02x to $%04x\n", value, address)
 		}
 		if p.panicNotImplemented {
 			panic(fmt.Sprintf("Unknown softswitch on write to $%04x", address))
 		}
 		return
 	}
-	if p.trace && address != 0xc000 {
+	if p.isTraced(address) {
 		name := p.softSwitchesWName[pageAddress]
 		fmt.Printf("Softswitch poke on $%04x %v with $%02x\n", address, name, value)
 	}