Imaginary Fujinet Clock device with prodos datetime format

README.md

@@ -30,7 +30,10 @@ Portable emulator of an Apple II+ or //e. Written in Go.
   - Videx Videoterm 80 column card with the Videx Soft Video Switch (Apple ][+ only)
   - SwyftCard (Apple //e only)
 - Useful cards not emulating a real card
-  - Bootable SmartPort / ProDOS card
+  - Bootable SmartPort / ProDOS card with the following smartport devices:
+      - Block device (hard disks)
+      - Fujinet network device (supports only http(s) with GET and JSON)
+      - Fujinet clock (not in Fujinet upstream)
   - VidHd, limited to the ROM signature and SHR as used by Total Replay, only for //e models with 128Kb
   - FASTChip, limited to what Total Replay needs to set and clear fast mode
   - Mouse Card, emulates the entry points, not the softswitches.

cardSmartport.go

@@ -132,7 +132,12 @@ func (c *CardSmartPort) exec(call *smartPortCall) uint8 {
 		if unit == 0 {
 			unit = 1 // For unit 0(host) use the first device
 		}
-		result = c.devices[unit-1].exec(call)
+
+		if unit > len(c.devices) {
+			result = smartPortErrorNoDevice
+		} else {
+			result = c.devices[unit-1].exec(call)
+		}
 	}
 
 	if c.trace {
@@ -149,7 +154,7 @@ func (c *CardSmartPort) hostStatus(call *smartPortCall) uint8 {
 	}
 
 	// See http://www.1000bit.it/support/manuali/apple/technotes/smpt/tn.smpt.2.html
-	c.a.mmu.Poke(dest+0, 0x01) // One device
+	c.a.mmu.Poke(dest+0, uint8(len(c.devices)))
 	c.a.mmu.Poke(dest+1, 0xff) // No interrupt
 	c.a.mmu.Poke(dest+2, 0x00)
 	c.a.mmu.Poke(dest+3, 0x00) // Unknown manufacturer

smartPortFujinetClock.go

@@ -68,13 +68,13 @@ func (d *SmartPortFujinetClock) status(code uint8, dest uint16) uint8 {
 			smartPortStatusCodeTypeRead & smartPortStatusCodeTypeOnline,
 			0, 0, 0, // Block size is 0
 			8, 'F', 'N', '_', 'C', 'L', 'O', 'C', 'K', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
-			0x0f,       // Type clock. See http://www.1000bit.it/support/manuali/apple/technotes/smpt/tn.smpt.4.html
+			0x13,       // Type fujinet clock.
 			0x00,       // Subtype
 			0x00, 0x01, // Firmware version
 		})
 
 	case 'T':
-		// Get time
+		// Get time and send it in easy to use format
 		now := time.Now()
 		d.host.a.mmu.pokeRange(dest, []uint8{
 			uint8(now.Year() / 100),
@@ -85,6 +85,23 @@ func (d *SmartPortFujinetClock) status(code uint8, dest uint16) uint8 {
 			uint8(now.Minute()),
 			uint8(now.Second()),
 		})
+
+	case 'P':
+		// Get time and send it in ProDOS format
+		// See 6.1 in https://prodos8.com/docs/techref/adding-routines-to-prodos/
+		now := time.Now()
+
+		datelo := uint8(now.Day()) + uint8(now.Month())<<5
+		datehi := uint8(now.Year()%100)<<1 + uint8(now.Month())>>3
+		timelo := uint8(now.Minute())
+		timehi := uint8(now.Hour())
+
+		d.host.a.mmu.pokeRange(dest, []uint8{
+			datelo,
+			datehi,
+			timelo,
+			timehi,
+		})
 	}
 
 	return smartPortNoError // The return code is always success

traceProDOS.go

@@ -141,7 +141,7 @@ func (t *traceProDOS) dumpMLIReturn() {
 			minute := t.a.mmu.Peek(0xbf92)
 			hour := t.a.mmu.Peek(0xbf93)
 			fmt.Printf("%04v-%02v-%02v %02v:%02v\n",
-				date>>9+1900, (date>>5)&0x1f, date&0x1f, // Review Y2K
+				date>>9+1900, (date>>5)&0x0f, date&0x1f, // Review Y2K
 				hour, minute)
 		case 0xc5: // Online
 			dataAddress := t.paramWord(2)