Help is uppercase when lowercase is not supported

apple2.go

@@ -19,6 +19,7 @@ type Apple2 struct {
 	softVideoSwitch *SoftVideoSwitch
 	board           string
 	isApple2e       bool
+	hasLowerCase    bool
 	isFourColors    bool // An Apple II without the 6 color mod
 	commandChannel  chan command
 

screen/snapshotsDebug.go

@@ -162,6 +162,9 @@ func SnapshotCharacterGenerator(vs VideoSource, isAltText bool) *image.RGBA {
 
 // SnapshotMessageGenerator shows a message on the screen
 func SnapshotMessageGenerator(vs VideoSource, message string) *image.RGBA {
+	if !vs.SupportsLowercase() {
+		message = strings.ToUpper(message)
+	}
 	lines := strings.Split(message, "\n")
 	text := make([]uint8, textLines*text40Columns)
 	for i := range text {

screen/testScenarios.go

@@ -134,6 +134,11 @@ func (ts *TestScenario) GetCardImage(light color.Color) *image.RGBA {
 	return nil
 }
 
+// SupportsLowercase returns true if the video source supports lowercase
+func (ts *TestScenario) SupportsLowercase() bool {
+	return true
+}
+
 func buildImageName(name string, screenMode int, altSet bool) string {
 	var screenName string
 	switch screenMode {

screen/videoSource.go

@@ -53,4 +53,6 @@ type VideoSource interface {
 	GetSuperVideoMemory() []uint8
 	// GetCardImage returns an image provided by a card, like the videx card
 	GetCardImage(light color.Color) *image.RGBA
+	// SupportsLowercase returns true if the video source supports lowercase
+	SupportsLowercase() bool
 }

setup.go

@@ -19,10 +19,12 @@ func configure(configuration *configuration) (*Apple2, error) {
 
 	addApple2SoftSwitches(a.io)
 	if a.isApple2e {
+		a.hasLowerCase = true
 		a.mmu.initExtendedRAM(1)
 		addApple2ESoftSwitches(a.io)
 	}
 	if board == "base64a" {
+		a.hasLowerCase = true
 		addBase64aSoftSwitches(a.io)
 	}
 

videoSourceImpl.go

@@ -155,6 +155,11 @@ func (a *Apple2) GetCardImage(light color.Color) *image.RGBA {
 	return a.softVideoSwitch.BuildAlternateImage(light)
 }
 
+// SupportsLowercase returns true if the video source supports lowercase
+func (a *Apple2) SupportsLowercase() bool {
+	return a.hasLowerCase
+}
+
 // DumpTextModeAnsi returns the text mode contents using ANSI escape codes for reverse and flash
 func DumpTextModeAnsi(a *Apple2) string {
 	is80Columns := a.io.isSoftSwitchActive(ioFlag80Col)