From fbda5ce927e5f93a11b10ed7778b7ac71f01ae4d Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Mon, 28 Aug 2023 23:09:51 -0400
Subject: [PATCH] cardiograph - WIP - Create minimal version of `cardiograph`
 file to act as CLI entrypoint to simulator

---
 src/cardiograph.js | 80 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/cardiograph.js

diff --git a/src/cardiograph.js b/src/cardiograph.js
new file mode 100644
index 0000000..c227129
--- /dev/null
+++ b/src/cardiograph.js
@@ -0,0 +1,80 @@
+const CFG = require('./machine.config');
+const CPU = require('./cpu.lib.js');
+
+const { num2hex, bool2bit } = require('./logging.js');
+const display = require('./display.js');
+
+ // TODO TEMPORARY - replace with reading STDIN:
+  const assembler = require('./assembler.js');
+  const fs = require('fs');
+const { log } = require('console');
+
+
+  const filename = process.argv[2];
+  const inputFile_str = fs.readFileSync(filename, 'utf8');
+  let assemblerOutput = assembler.assemble(inputFile_str);
+
+let cpu = new CPU(CFG.INITIAL_IP_ADDRESS, CFG.DEFAULT_CYCLE_LIMIT);
+
+cpu.loadMemory(assemblerOutput.machineCode); // TODO
+cpu.loadSourceInfo(assemblerOutput.debugInfo); // TODO
+
+cpu.onCycleEnd(tick);
+cpu.onCycleEnd(logDisplay);
+cpu.onCycleEnd(logCPUState);
+
+cpu.start();
+cpu.step();
+
+async function tick() {
+  const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))
+  await sleep(100);
+  cpu.step();
+  if (!cpu.running) {
+    console.log('Halted');
+    process.exit();
+  }
+}
+
+function logDisplay() {
+  display.show(cpu.memory, true);
+}
+
+function logCPUState() {
+  let lineInfo = cpu.dbg.sourceInfo[cpu.dbg.previousIP];
+  console.group(`Step ${cpu.dbg.cycleCounter}`);
+    console.log();
+    if (lineInfo) {
+      console.log(`Line ${lineInfo.lineNumber}: ${lineInfo.source}`);
+      console.log();
+    }
+    console.log('Mnemonic:', cpu.dbg.currentMnemonic);
+    console.log(`Machine:  $${num2hex(cpu.instruction.opcode)} $${num2hex(cpu.instruction.operand)}`);
+    console.log();
+    console.log(`IP: $${num2hex(cpu.IP)}  Acc: $${num2hex(cpu.acc)}  ONZC ${bool2bit(cpu.flags.O)}${bool2bit(cpu.flags.N)}${bool2bit(cpu.flags.Z)}${bool2bit(cpu.flags.C)}`);
+    // TODO:
+    // console.log(`KEY: $${num2hex(cpu.state.memory[KEYPAD_ADDR])}  ${cpu.state.running ? "state.running" : "halted" }`);
+    console.log();
+    console.log();
+  console.groupEnd();
+};
+
+
+/*
+(async function() {
+  let input = await getInput();
+  console.log(input);
+})()
+*/
+
+async function getInput() {
+  // https://wellingguzman.com/notes/node-pipe-input
+  return new Promise(function (resolve, reject) {
+    const stdin = process.stdin;
+    stdin.setEncoding('utf8');
+    let data = '';
+    stdin.on('data', function (chunk) { data += chunk; });
+    stdin.on('end', function () { resolve(data); });
+    stdin.on('error', reject);
+  });
+}
\ No newline at end of file