Add support for meta key

Closes #181
Use the Open-Apple key to send meta key (alt)

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -47,6 +47,7 @@ body:
       label: Driver Version
       description: What version of the driver are you running? Check with `RPI a2version`
       options:
+        - 0030 (add support for meta key)
         - 002E (fix driver crash on null drive)
         - 002D (add support for RPi Pico hardware)
         - 002C (fix nano editor)
@@ -69,6 +70,7 @@ body:
       label: Shell Version
       description: What version of the shell are you running?`
       options:
+        - 0011 (add support for meta key)
         - 0010 / 8010 (support latest firmware)
         - 000F / 800F (add pico and classic hardware support)
         - 000E (fix hang on exit)

Apple2/Shell.asm

@@ -43,6 +43,7 @@ PrintByte = $FDDA
 
 Keyboard = $c000
 ClearKeyboard = $c010
+OpenApple = $c061
 Home = $fc58
 Wait = $fca8
 PromptChar = $33
@@ -232,7 +233,10 @@ keyPressed:
  rol
  bcs keyPressed
  lda Keyboard ;send keypress to RPi
- and #$7f
+ bit OpenApple
+ bmi noClearHighBit
+ and #$7f ; clear high bit unless Alt pressed
+noClearHighBit:
  sta OutputByte,x
  bit ClearKeyboard
 .if HW_TYPE = 0
@@ -310,9 +314,9 @@ restoreChar:
 
 Text:
 .if HW_TYPE = 0
-.byte	"Apple2-IO-RPi Shell Version 0010 (classic)",$8d
+.byte	"Apple2-IO-RPi Shell Version 0011 (classic)",$8d
 .else
-.byte	"Apple2-IO-RPi Shell Version 8010 (pico)",$8d
+.byte	"Apple2-IO-RPi Shell Version 8011 (pico)",$8d
 .endif
 .byte	"(c)2020-2024 Terence J. Boldt",$8d
 .byte   $8d

RaspberryPi/apple2driver/a2io/vt100.go

@@ -223,6 +223,9 @@ func readCharacter(comm A2Io) (string, error) {
 	b, err := comm.ReadByte(true)
 	var s = string(b)
 	if err == nil {
+		if b >= 0x80 {
+			s = "\033" + string(b & 0x7f)
+		} else {
 			if applicationMode {
 				switch b {
 				case 0x0b: // up
@@ -251,5 +254,6 @@ func readCharacter(comm A2Io) (string, error) {
 				}
 			}
 		}
+	}
 	return s, err
 }

RaspberryPi/apple2driver/info/version.go

@@ -8,4 +8,4 @@ package info
 
 // Version is the hexadecimal version number that
 // should be incremented with each driver update
-const Version = "002F"
+const Version = "0030"