MOSCIA TOD and other tests added. Breaks due to interrupt issues.

test/unit.src.MOSCIA.spec.js

@@ -4,6 +4,44 @@ const MOSCIA = require('../src/MOSCIA.js');
 
 describe("MOSCIA Tests...", function(){
   //var cia = new MOSCIA();
+  
+  it("R/W Pin", function(){
+    let cia = new MOSCIA();
+    // The RW pin is default low, so writting should be enabled.
+
+    cia.RS = 0x02;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.DATA = 0xFF;
+    expect(cia.DATA).to.be.equal(0xFF);
+
+    // Set RW high to disable writting!
+    cia.RW = 1;
+    cia.DATA = 0x00;
+    expect(cia.DATA).to.be.equal(0xFF);
+
+    // Set it low once more
+    cia.RW = 0;
+    cia.DATA = 0x00;
+    expect(cia.DATA).to.be.equal(0x00);
+  });
+
+  it("Interrupts (via FLAG)", function(){
+    let cia = new MOSCIA();
+
+    cia.FLAG = 1;
+    cia.RS = 0x0D;
+    let IC = cia.DATA;
+    expect(IC & 0x10).to.be.equal(0x10);
+    expect(IC & 0x80).to.be.equal(0x80);
+    expect(cia.DATA).to.be.equal(0x00);
+
+    // Setting data changes the interrupt mask. This should mask the
+    // FLAG interrupt.
+    cia.DATA = 0x90;
+    cia.FLAG = 1;
+    IC = cia.DATA;
+    expect(IC).to.be.equal(0x00);
+  });
 
   it("PD*/DD* Masking", function(){
     let cia = new MOSCIA();
@@ -67,7 +105,9 @@ describe("MOSCIA Tests...", function(){
     Input(1);
     expect(cia.DATA).to.be.equal(0xCD);
     cia.RS = 0x0D;
-    expect((cia.DATA & 0x08) >> 3).to.be.equal(1);
+    let IC = cia.DATA;
+    expect(IC & 0x08).to.be.equal(0x08);
+    expect(IC & 0x80).to.be.equal(0x80);
     // Reading from RS = 0x0D should clear the interrupt values. Checking this
     expect(cia.DATA).to.be.equal(0);
 
@@ -91,4 +131,238 @@ describe("MOSCIA Tests...", function(){
     expect((cia.DATA & 0x08) >> 3).to.be.equal(1);
     expect(cia.DATA).to.be.equal(0);
   });
+
+  it("TOD 60hz", function(){
+    // NOTE: The TOD clock doesn't actually enforce the frequency.
+    // The TOD 'pin' is expected to be attached to a clock pulsing at the
+    // designated frequency.
+    // As such, this test will run MUCH MUCH faster than the 1.1 seconds
+    // actually being checked (because I'm not using a clock here).
+    let cia = new MOSCIA();
+    let tick60 = () => {
+      for (let i=0; i < 6; i++)
+        cia.TOD = 1;
+    };
+    // NOTE: The CIA defaults to 60hz TOD clock. Nothing needs to be set.
+
+    // Check that seconds is at 0 (we'll test this again later)
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0);
+
+    // Switch to 10ths of a second and go!
+    cia.RS = 0x08;
+    expect(cia.DATA).to.be.equal(0);
+    tick60();
+    expect(cia.DATA).to.be.equal(0x01);
+    tick60();
+    expect(cia.DATA).to.be.equal(0x02);
+    tick60();
+    expect(cia.DATA).to.be.equal(0x03);
+    for (let i=0; i < 8; i++)
+      tick60();
+    // Should have looped back around a little at this point!
+    expect(cia.DATA).to.be.equal(0x01);
+
+    // Check seconds again. This should have gone up once!
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x01);
+  });
+
+  it("TOD 50hz", function(){
+    // NOTE: The TOD clock doesn't actually enforce the frequency.
+    // The TOD 'pin' is expected to be attached to a clock pulsing at the
+    // designated frequency.
+    // As such, this test will run MUCH MUCH faster than the 1.1 seconds
+    // actually being checked (because I'm not using a clock here).
+    let cia = new MOSCIA();
+    let tick50 = () => {
+      for (let i=0; i < 5; i++)
+        cia.TOD = 1;
+    };
+    // enabling 50 hz mode.
+    cia.RS = 0x0E;
+    cia.DATA = cia.DATA | 0x80;
+
+    // Check that seconds is at 0 (we'll test this again later)
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0);
+
+    // Switch to 10ths of a second and go!
+    cia.RS = 0x08;
+    expect(cia.DATA).to.be.equal(0);
+    tick50();
+    expect(cia.DATA).to.be.equal(0x01);
+    tick50();
+    expect(cia.DATA).to.be.equal(0x02);
+    tick50();
+    expect(cia.DATA).to.be.equal(0x03);
+    for (let i=0; i < 8; i++)
+      tick50();
+    // Should have looped back around a little at this point!
+    expect(cia.DATA).to.be.equal(0x01);
+
+    // Check seconds again. This should have gone up once!
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x01);
+  });
+
+
+  it("TOD Latching", function(){
+    let cia = new MOSCIA();
+    let tick = (cycles) => {
+      let ccount = cycles * 6;
+      for (let i=0; i < ccount; i++)
+        cia.TOD = 1;
+    };
+    cia.setTOD(0x03, 0x59, 0x58, 0x00);
+
+    // Copying current clock values for later reference.
+    let TOD = [0,0,0,0];
+    cia.RS = 0x08;
+    TOD[0] = cia.DATA;
+    cia.RS = 0x09;
+    TOD[1] = cia.DATA;
+    cia.RS = 0x0A;
+    TOD[2] = cia.DATA;
+    cia.RS = 0x0B;
+    TOD[3] = cia.DATA; // This should latch the timer!!
+
+    tick(11); // Simulate 1.1 second time passing.
+
+    // TOD Latch shouldn't be released until next read from RS=0x08, so...
+    expect(cia.DATA).to.be.equal(TOD[3]);
+    cia.RS = 0x0A;
+    expect(cia.DATA).to.be.equal(TOD[2]);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(TOD[1]);
+    cia.RS = 0x08;
+    expect(cia.DATA).to.be.equal(TOD[0]); // Should release the TOD latch
+
+    // With latch released, we should be able to read the new time...
+    expect(cia.DATA).to.be.equal(0x01);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x59);
+  });
+
+
+  it("TOD Time Rollover with AM/PM change", function(){
+    let cia = new MOSCIA();
+    let tick = () => {
+      for (let i=0; i < 6; i++)
+        cia.TOD = 1;
+    };
+
+    cia.setTOD(0x11, 0x59, 0x59, 0x09);
+    tick();
+
+    cia.RS = 0x0B;
+    expect(cia.DATA).to.be.equal(0x80);
+    cia.RS = 0x0A;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x08;
+    expect(cia.DATA).to.be.equal(0x00);
+
+    cia.setTOD(0x91, 0x59, 0x59, 0x09);
+    tick();
+    cia.RS = 0x0B;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x0A;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x08;
+    expect(cia.DATA).to.be.equal(0x00);
+  }); 
+
+  it("TOD Write Time and Cycle Stop on Write", function(){
+    let cia = new MOSCIA();
+    let tick = (cycles) => {
+      let ccount = cycles * 6;
+      for (let i=0; i < ccount; i++)
+        cia.TOD = 1;
+    };
+
+    cia.RS = 0x0B;
+    cia.DATA = 0x11;
+    cia.RS = 0x0A;
+    cia.DATA = 0x30;
+    cia.RS = 0x09;
+    cia.DATA = 0x20;
+    
+    // The lock on the timer isn't released until a write to RS=0x08
+    // so running a few ticks should NOT change the current values!
+    tick(10);
+    cia.RS = 0x0B;
+    expect(cia.DATA).to.be.equal(0x11);
+    cia.RS = 0x0A;
+    expect(cia.DATA).to.be.equal(0x30);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x20);
+    cia.RS = 0x08;
+    expect(cia.DATA).to.be.equal(0x00);
+
+    // Write to RS=0x08 and cycle again!
+    cia.DATA = 0x08; // <= 8/10ths a second.
+    tick(8);
+    expect(cia.DATA).to.be.equal(0x06);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x21);
+
+    // Check if writing is prevented unless Hours (0x0B) is written to first
+    cia.DATA = 0x44;
+    expect(cia.DATA).to.be.equal(0x21);
+    cia.RS = 0x08;
+    cia.DATA = 0x04;
+    expect(cia.DATA).to.be.equal(0x06);
+  });
+
+  it("Set and Trigger TOD Alarm", function(){
+    let cia = new MOSCIA();
+    let tick = (cycles) => {
+      let ccount = cycles * 6;
+      for (let i=0; i < ccount; i++)
+        cia.TOD = 1;
+    };
+
+    // Setting up the alarm interrupts!
+    cia.RS = 0x0D;
+    cia.DATA = 0x84;
+
+    // Setting alarm values.
+    cia.RS = 0x0F;
+    cia.DATA = cia.DATA | 0x80;
+    cia.RS = 0x0B;
+    cia.DATA = 0x01;
+    cia.RS = 0x0A;
+    cia.DATA = 0x01;
+    cia.RS = 0x09;
+    cia.DATA = 0x01;
+    cia.RS = 0x08;
+    cia.DATA = 0x04;
+ 
+    // Testing that all TOD values remain unchanged.
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x09;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x0A;
+    expect(cia.DATA).to.be.equal(0x00);
+    cia.RS = 0x0B;
+    expect(cia.DATA).to.be.equal(0x00);
+
+    // Forcing TOD to be 4/10ths a second from triggering the alarm.
+    cia.setTOD(0x01, 0x01, 0x01, 0x00);
+    tick(4);
+    cia.RS = 0x0D;
+    // Hold the value as the IC clears after a read.
+    let IC = cia.DATA;
+    expect(IC & 0x04).to.be.equal(0x04);
+    expect(IC & 0x80).to.be.equal(0x80);
+  });
 });
+
+
+
+
+