diff --git a/system/drivers/ps2-bus/ps2-bus.zig b/system/drivers/ps2-bus/ps2-bus.zig
index 490f565..2438a92 100644
--- a/system/drivers/ps2-bus/ps2-bus.zig
+++ b/system/drivers/ps2-bus/ps2-bus.zig
@@ -118,8 +118,8 @@ pub fn main() void {
         maybe_controller = controller;
         maybe_interrupt_index = findInterruptResourceIndex(controller_device_descriptor);
 
-        controller.disablePort(.One);
-        controller.disablePort(.Two);
+        controller.disablePort(.one);
+        controller.disablePort(.two);
         controller.flushOutputBuffer();
 
         const current = controller.readConfigurationByte() orelse {
@@ -154,20 +154,20 @@ pub fn main() void {
         if (has_two_channels) {
             _ = runtime.system.write("system/drivers/ps2-bus: has two channels\n");
             // keep the bus quiet until we have tested the ports and are ready to use them
-            controller.disablePort(.Two);
+            controller.disablePort(.two);
         } else {
             _ = runtime.system.write("system/drivers/ps2-bus: has one channel\n");
         }
 
         // interface tests: always test port 1, test port 2 only if it exists
-        const port_one_works = (controller.testPort(.One) orelse {
+        const port_one_works = (controller.testPort(.one) orelse {
             _ = runtime.system.write("system/drivers/ps2-bus: port 1 test timed out\n");
             return;
         }) == ps2.response_port_test_passed;
 
         var port_two_works = false;
         if (has_two_channels) {
-            port_two_works = (controller.testPort(.Two) orelse {
+            port_two_works = (controller.testPort(.two) orelse {
                 _ = runtime.system.write("system/drivers/ps2-bus: port 2 test timed out\n");
                 return;
             }) == ps2.response_port_test_passed;
@@ -181,20 +181,20 @@ pub fn main() void {
         // Enable the working ports. Their interrupts stay off until IRQ1 is bound
         // below — reset and identify use polled reads, which must never race the
         // interrupt-driven drain loop for bytes.
-        controller.enablePort(.One);
-        if (port_two_works) controller.enablePort(.Two);
+        controller.enablePort(.one);
+        if (port_two_works) controller.enablePort(.two);
 
         // reset each working device; a failing device is logged but does not
         // abort bring-up of the other one
         if (port_one_works) {
-            if (controller.resetDevice(.One)) |passed| {
+            if (controller.resetDevice(.one)) |passed| {
                 if (!passed) _ = runtime.system.write("system/drivers/ps2-bus: port 1 device reset failed\n");
             } else {
                 _ = runtime.system.write("system/drivers/ps2-bus: port 1 device reset timed out\n");
             }
         }
         if (port_two_works) {
-            if (controller.resetDevice(.Two)) |passed| {
+            if (controller.resetDevice(.two)) |passed| {
                 if (!passed) _ = runtime.system.write("system/drivers/ps2-bus: port 2 device reset failed\n");
             } else {
                 _ = runtime.system.write("system/drivers/ps2-bus: port 2 device reset timed out\n");
@@ -204,8 +204,8 @@ pub fn main() void {
         // Identify the device on each working port and hand it off to the driver
         // that matches what it reported — a port is not assumed to be a keyboard
         // or a mouse by its number.
-        if (port_one_works) port_device_types[@intFromEnum(ps2.Port.One)] = spawnIdentifiedDriver(controller, .One);
-        if (port_two_works) port_device_types[@intFromEnum(ps2.Port.Two)] = spawnIdentifiedDriver(controller, .Two);
+        if (port_one_works) port_device_types[@intFromEnum(ps2.Port.one)] = spawnIdentifiedDriver(controller, .one);
+        if (port_two_works) port_device_types[@intFromEnum(ps2.Port.two)] = spawnIdentifiedDriver(controller, .two);
     } else {
         _ = runtime.system.write("system/drivers/ps2-bus: no PS/2 controller found\n");
         return;
@@ -243,7 +243,7 @@ pub fn main() void {
     // claim that node too and route its IRQ to the same endpoint. The IRQ belongs
     // to the *port*, whatever device identify found on it.
     var maybe_auxiliary_interrupt: ?struct { device_id: u64, interrupt_index: u64, gsi: u64 } = null;
-    if (port_device_types[@intFromEnum(ps2.Port.Two)] != null) {
+    if (port_device_types[@intFromEnum(ps2.Port.two)] != null) {
         if (device.findDeviceDescriptorByHid(buffer, acpi_ids.HardwareId.ps2_mouse.hid())) |descriptor| {
             if (findInterruptResourceIndex(descriptor)) |auxiliary_index| {
                 if (device.claim(descriptor.id) and device.irqBind(descriptor.id, auxiliary_index, endpoint)) {
@@ -263,8 +263,8 @@ pub fn main() void {
         _ = runtime.system.write("system/drivers/ps2-bus: controller configuration timed out\n");
         return;
     };
-    if (port_device_types[@intFromEnum(ps2.Port.One)] != null) configuration |= ps2.Port.One.interruptBit();
-    if (maybe_auxiliary_interrupt != null) configuration |= ps2.Port.Two.interruptBit();
+    if (port_device_types[@intFromEnum(ps2.Port.one)] != null) configuration |= ps2.Port.one.interruptBit();
+    if (maybe_auxiliary_interrupt != null) configuration |= ps2.Port.two.interruptBit();
     _ = controller.writeConfigurationByte(configuration);
 
     _ = runtime.system.write("system/drivers/ps2-bus: ok\n");
@@ -284,7 +284,7 @@ pub fn main() void {
                 const current_status = ps2.status(controller.device_id, controller.status_index);
                 if (current_status & ps2.status_output_buffer_full == 0) break;
                 const byte = device.ioRead(controller.device_id, controller.data_index, 0, 1) orelse break;
-                const port: ps2.Port = if (current_status & ps2.status_auxiliary_output != 0) .Two else .One;
+                const port: ps2.Port = if (current_status & ps2.status_auxiliary_output != 0) .two else .one;
                 if (port_endpoints[@intFromEnum(port)]) |child| {
                     const forwarded = ps2.ForwardedByte{ .port = @intFromEnum(port), .byte = byte };
                     _ = ipc.send(child, std.mem.asBytes(&forwarded));
diff --git a/system/drivers/ps2-bus/ps2-library.zig b/system/drivers/ps2-bus/ps2-library.zig
index 944a091..0eeac4d 100644
--- a/system/drivers/ps2-bus/ps2-library.zig
+++ b/system/drivers/ps2-bus/ps2-library.zig
@@ -153,46 +153,46 @@ pub fn writeData(id: u64, status_index: u64, data_index: u64, byte: u8, timeout_
 }
 
 pub const Port = enum(u2) {
-    One,
-    Two,
+    one,
+    two,
 
     /// Command register byte that disables this port.
     fn disableCommand(self: Port) u8 {
         return switch (self) {
-            .One => cmd_disable_first_port,
-            .Two => cmd_disable_second_port,
+            .one => cmd_disable_first_port,
+            .two => cmd_disable_second_port,
         };
     }
 
     /// Command register byte that enables this port (and its clock).
     fn enableCommand(self: Port) u8 {
         return switch (self) {
-            .One => cmd_enable_first_port,
-            .Two => cmd_enable_second_port,
+            .one => cmd_enable_first_port,
+            .two => cmd_enable_second_port,
         };
     }
 
     /// Command register byte that runs this port's interface test.
     fn testCommand(self: Port) u8 {
         return switch (self) {
-            .One => cmd_test_first_port,
-            .Two => cmd_test_second_port,
+            .one => cmd_test_first_port,
+            .two => cmd_test_second_port,
         };
     }
 
     /// Configuration-byte bit that, when set, disables this port's clock.
     pub fn clockDisabledBit(self: Port) u8 {
         return switch (self) {
-            .One => configuration_first_port_clock_disabled,
-            .Two => configuration_second_port_clock_disabled,
+            .one => configuration_first_port_clock_disabled,
+            .two => configuration_second_port_clock_disabled,
         };
     }
 
     /// Configuration-byte bit that, when set, enables this port's interrupt.
     pub fn interruptBit(self: Port) u8 {
         return switch (self) {
-            .One => configuration_first_port_interrupt,
-            .Two => configuration_second_port_interrupt,
+            .one => configuration_first_port_interrupt,
+            .two => configuration_second_port_interrupt,
         };
     }
 
@@ -200,8 +200,8 @@ pub const Port = enum(u2) {
     /// output buffer (makes a byte appear as if it came from the device).
     pub fn writeOutputBufferCommand(self: Port) u8 {
         return switch (self) {
-            .One => cmd_write_first_port_output,
-            .Two => cmd_write_second_port_output,
+            .one => cmd_write_first_port_output,
+            .two => cmd_write_second_port_output,
         };
     }
 
@@ -210,24 +210,24 @@ pub const Port = enum(u2) {
     /// prefix (null); port 2 requires the "write second port input" command.
     pub fn deviceInputCommand(self: Port) ?u8 {
         return switch (self) {
-            .One => null,
-            .Two => cmd_write_second_port_input,
+            .one => null,
+            .two => cmd_write_second_port_input,
         };
     }
 
     /// Controller output-port bit driving this port's clock line.
     pub fn outputPortClockBit(self: Port) u8 {
         return switch (self) {
-            .One => output_port_first_port_clock,
-            .Two => output_port_second_port_clock,
+            .one => output_port_first_port_clock,
+            .two => output_port_second_port_clock,
         };
     }
 
     /// Controller output-port bit driving this port's data line.
     pub fn outputPortDataBit(self: Port) u8 {
         return switch (self) {
-            .One => output_port_first_port_data,
-            .Two => output_port_second_port_data,
+            .one => output_port_first_port_data,
+            .two => output_port_second_port_data,
         };
     }
 
@@ -235,8 +235,8 @@ pub const Port = enum(u2) {
     /// (wired to the port's IRQ line).
     pub fn outputPortBufferFullBit(self: Port) u8 {
         return switch (self) {
-            .One => output_port_first_port_output_full,
-            .Two => output_port_second_port_output_full,
+            .one => output_port_first_port_output_full,
+            .two => output_port_second_port_output_full,
         };
     }
 };
@@ -393,9 +393,9 @@ pub const Controller = struct {
     /// enabled; the caller should disable it again to keep the bus quiet until
     /// device bring-up.
     pub fn hasTwoChannels(self: Controller) ?bool {
-        self.enablePort(.Two);
+        self.enablePort(.two);
         const configuration = self.readConfigurationByte() orelse return null;
-        return (configuration & Port.Two.clockDisabledBit()) == 0;
+        return (configuration & Port.two.clockDisabledBit()) == 0;
     }
 
     /// Reset the device attached to `port` (device command 0xFF) and wait for