Video and Keyboard drivers

Video and Keyboard drivers

Co-Authored-By: Computer construction kit SmartyKit <smartykit@users.noreply.github.com>

SmartyKitApple1_KeyboardDriver/SmartyKitApple1_KeyboardDriver.ino

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+#include "PS2Keyboard.h"
+
+const int DataPin = 3;
+const int IRQpin =  2;
+
+
+const int pinKBDCR =  12; // 
+
+int DataBus[8] = {4, 5, 6, 7, 8, 9, 10, 11};
+
+PS2Keyboard keyboard;
+
+void setup()
+{
+   for (int count = 1; count <= 8; count++) {
+    pinMode(DataBus[count-1], OUTPUT); 
+  };
+  pinMode(pinKBDCR, OUTPUT); 
+  KBDCR_Disable();
+  
+  delay(1000);
+  keyboard.begin(DataPin, IRQpin);
+  Serial.begin(9600);
+  Serial.println("Keyboard:");
+ 
+}
+
+void KBDCR_Enable()
+{
+  digitalWrite(pinKBDCR, HIGH);
+}
+void KBDCR_Disable()
+{
+  digitalWrite(pinKBDCR, LOW);
+}
+
+void loop() {
+  KBDCR_Disable();
+  
+  if (keyboard.available()) {
+    
+    // read the next key
+    char c = keyboard.read();
+    
+    // check for some of the special keys
+    if (c == PS2_ENTER) {
+      Serial.println();
+    } else if (c == PS2_TAB) {
+      Serial.print("[Tab]");
+    } else if (c == PS2_ESC) {
+      Serial.print("[ESC]");
+    } else if (c == PS2_PAGEDOWN) {
+      Serial.print("[PgDn]");
+    } else if (c == PS2_PAGEUP) {
+      Serial.print("[PgUp]");
+    } else if (c == PS2_LEFTARROW) {
+      Serial.print("[Left]");
+    } else if (c == PS2_RIGHTARROW) {
+      Serial.print("[Right]");
+    } else if (c == PS2_UPARROW) {
+      Serial.print("[Up]");
+    } else if (c == PS2_DOWNARROW) {
+      Serial.print("[Down]");
+    } else if (c == PS2_DELETE) {
+      Serial.print("[Del]");
+    } else {
+      
+      // otherwise, just print all normal characters
+      Serial.print(c);
+    }
+
+    //print c to register
+    for (int count = 1; count <= 8 ; count++) 
+    {
+      if ((int)c & (1 << (count-1))) 
+        digitalWrite(DataBus[count-1], HIGH);
+      else
+        digitalWrite(DataBus[count-1], LOW);
+    }
+    digitalWrite(DataBus[7], HIGH);
+    KBDCR_Enable();
+    delay(20);
+  }
+}

SmartyKitApple1_VideoTerminal/SmartyKitApple1_VideoTerminal.ino

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+/*  SmartyKit Apple I replica - video driver
+ *  http://apple1.smartykit.org/ 
+ *  Copyright (C) 2019, Sergey Panarin <contact@smartykit.org>
+ *  
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <TVout.h>
+#include <avr/pgmspace.h>
+
+const int IRQpin =  2; // write to display
+
+const int pinDA =  12; // read
+
+//int DataBus[8] = {4, 5, 6, 7, 8, 9, 10, 11};
+//TV uses pin 7 and pin 9
+int DataBus[8] = {4, 5, 6, 3, 8, 13, 10, 11};
+
+
+int bitDA = 0;
+
+byte scan_code=0;  
+
+TVout TV;
+
+void setup() {
+  TV.begin(PAL, 128, 96);
+  TV.selectFont(font6x8);
+  TV.println("Hello!\r\nI am SmartyKit Apple I replica\n");
+
+   delay(1000);
+  for (int count = 1; count <= 8; count++) {
+    pinMode(DataBus[count-1], INPUT); 
+  };
+  pinMode(IRQpin, INPUT); 
+  pinMode(pinDA, OUTPUT); 
+
+  //attaching an IRQ to IRQpin
+  attachInterrupt(0, videoCharInterrupt, RISING); 
+  Serial.begin(9600); 
+}
+
+void loop() {
+  delay(100);
+}
+
+
+//interruption service routine (ISR)
+void videoCharInterrupt(void) {        
+
+  scan_code = 0;
+  for (int count = 1; count <= 8 ; count++) {
+    int pinValue = digitalRead(DataBus[count-1]);    
+    scan_code |= pinValue << (count-1);   
+  };
+
+  if (scan_code == 0x7F)
+     return; //skip initial setup value
+  
+  bitDA = 1;
+  digitalWrite(pinDA, HIGH);
+  
+  if (scan_code != 127)
+     scan_code -= 128;
+   
+  if (scan_code == 0xD)
+  {
+      Serial.println();
+      TV.println("");
+  }
+  else
+  {
+      Serial.print((char)scan_code); 
+      TV.print((char)scan_code); 
+  } 
+
+  bitDA = 0;
+  digitalWrite(pinDA, LOW); 
+}