Rebase: Changes made to conform with rebase on develop

- desktop: Resolution/Graphics fields now read from video frontbuffer
  and gpu.activeDriverName instead of static multiboot/hardcoded values
- gpu: markAvailable sets ActiveName when no driver is active yet, so
  the initial VBE boot driver is reported before any setMode call
- kernel: whitespace cleanup

compile_lvgl.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # compile_lvgl.sh — Download LVGL v9.2 source and compile into lib/liblvgl.a
 # Clone & compile in /tmp (fast container-local fs).
-# Copy source + objects to /lvgl (host mount) for debugging.
+# Cache liblvgl.a on host mount (/code/lvgl/) to skip rebuild.
 set -e
 
 LVGL_VERSION="v9.2.2"
@@ -10,6 +10,7 @@ LVGL_DIR="/tmp/lvgl"
 OBJ_DIR="/tmp/lvgl_obj"
 CONF_DIR="$(pwd)/lvglh"
 OUT_DIR="$(pwd)/lib"
+CACHE_DIR="/code/lvgl"
 
 CC="gcc"
 CFLAGS="-m32 -march=i686 -ffreestanding \
@@ -26,6 +27,17 @@ echo " "
 echo "Compiling LVGL..."
 echo " "
 
+# If cached liblvgl.a exists on host mount, just copy it and skip everything
+if [ -f "${CACHE_DIR}/liblvgl.a" ]; then
+    echo "Found cached liblvgl.a in ${CACHE_DIR}, copying to ${OUT_DIR}..."
+    cp "${CACHE_DIR}/liblvgl.a" "${OUT_DIR}/liblvgl.a"
+    echo "(Delete lvgl/liblvgl.a to force a full rebuild.)"
+    echo " "
+    echo "LVGL compilation complete (cached)."
+    echo " "
+    exit 0
+fi
+
 # Clone LVGL into /tmp (container-local)
 rm -rf "$LVGL_DIR"
 echo "Downloading LVGL ${LVGL_VERSION}..."
@@ -105,12 +117,14 @@ else
     echo "No custom LVGL files in lvglh/."
 fi
 
-# Copy source + objects to /lvgl host mount for debugging
-echo "Copying LVGL source and objects to host mount..."
-mkdir /code/lvgl 2>/dev/null || true
-rm -rf /code/lvgl/* /code/lvgl/.[!.]* /code/lvgl/..?* 2>/dev/null || true
-cp -a "$LVGL_DIR/src" /code/lvgl/src
-cp -a "$OBJ_DIR" /code/lvgl/obj
+# Cache liblvgl.a and source to host mount for next build
+echo "Caching LVGL to host mount..."
+mkdir -p "$CACHE_DIR"
+rm -rf ${CACHE_DIR}/* ${CACHE_DIR}/.[!.]* ${CACHE_DIR}/..?* 2>/dev/null || true
+cp "${OUT_DIR}/liblvgl.a" "${CACHE_DIR}/liblvgl.a"
+cp -a "$LVGL_DIR/src" "${CACHE_DIR}/src"
+cp -a "$LVGL_DIR"/*.h "${CACHE_DIR}/" 2>/dev/null || true
+cp -a "$OBJ_DIR" "${CACHE_DIR}/obj"
 echo "Done."
 
 echo " "

compile_sources.sh

@@ -4,4 +4,4 @@ echo "======================="
 echo " "
 echo "Compiling FPC Sources..."
 echo " "
-fpc -Aelf -gw -g -gl -n -v0ew -O3 -OpPENTIUM3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/driver/* -Fusrc/driver/net/* -Fusrc/driver/bus/* -Fusrc/driver/bus/usb/* -Fusrc/driver/hid/* src/kernel.pas
+fpc -Aelf -gw -g -gl -n -v0ew -O3 -OpPENTIUM3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/include/* -Fusrc/driver/* -Fusrc/driver/net/* -Fusrc/driver/bus/* -Fusrc/driver/bus/usb/* -Fusrc/driver/hid/* src/kernel.pas

src/contextswitcher.pas

@@ -13,14 +13,117 @@
 //  limitations under the License.
 
 {
-	ContextSwitcher - Switch Process Contexts when preempted.
+    ContextSwitcher - Custom IRQ0 handler for preemptive context switching.
 
-	@author(Kieron Morris <[email protected]>)
+    Replaces the default ISR_32 with a naked assembly stub that saves the
+    interrupted context (PUSHAD + segment regs), calls a Pascal helper to
+    dispatch timer hooks, send EOI, and run the scheduler, then restores
+    the next process context (or idles) via the returned ESP.
+
+    @author(Kieron Morris <[email protected]>)
 }
 unit contextswitcher;
 
+{$ASMMODE intel}
+
 interface
 
-implementation;
+uses
+    idt, isrmanager, processmanager, proctypes, util, tracer;
+
+{ Initialise: overwrite IDT gate 32 with our custom ISR. }
+procedure init;
+
+implementation
+
+{ -----------------------------------------------------------------------
+  do_context_switch_work
+  Pascal helper called from the assembly ISR.  Receives the current ESP
+  (pointing to the GS..EFLAGS save area), dispatches timer hooks, sends
+  EOI, runs the scheduler and returns the ESP for the next context.
+  Uses register calling convention: saved_esp in EAX, result in EAX.
+  ----------------------------------------------------------------------- }
+function do_context_switch_work(saved_esp : uint32) : uint32;
+var
+    next : PProcessContext;
+begin
+    { 1. Save ESP into the current process }
+    processmanager.CurrentProcess^.SavedESP := saved_esp;
+
+    { 2. Dispatch all hooks registered on interrupt 32 (timer hooks).
+         This fires TMR_0_ISR.Main which in turn fires BDA tick,
+         graphics refresh, USB hotplug, etc. }
+    isrmanager.dispatchHooks(32);
+
+    { 3. Send End-Of-Interrupt to the master PIC }
+    outb($20, $20);
+
+    { 4. Pick the next process to run (always returns non-nil; idle as fallback) }
+    next := processmanager.scheduler_pick_next;
+    processmanager.CurrentProcess := next;
+
+    { 5. Return the selected process ESP }
+    do_context_switch_work := next^.SavedESP;
+end;
+
+{ -----------------------------------------------------------------------
+  context_switch_isr
+  Naked assembly ISR that replaces ISR_32 (IRQ0 / PIT timer).
+
+  Stack on entry (pushed by CPU):
+      [ESP+8] EFLAGS
+      [ESP+4] CS
+      [ESP+0] EIP
+
+  We push general-purpose and segment registers, call the Pascal helper,
+  switch ESP to the returned value, pop registers and IRETD.
+  ----------------------------------------------------------------------- }
+procedure context_switch_isr; assembler; nostackframe;
+asm
+    { Save all general-purpose registers (EAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI) }
+    pushad
+
+    { Save segment registers }
+    push ds
+    push es
+    push fs
+    push gs
+
+    { Load kernel data segments }
+    mov ax, $10
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
+    { Call Pascal helper: EAX = current ESP (register calling convention).
+      Returns new ESP in EAX. }
+    mov eax, esp
+    call do_context_switch_work
+    mov esp, eax
+
+    { Restore segment registers }
+    pop gs
+    pop fs
+    pop es
+    pop ds
+
+    { Restore general-purpose registers }
+    popad
+
+    { Return from interrupt }
+    iretd
+end;
+
+{ -----------------------------------------------------------------------
+  init
+  Override IDT gate 32 with our custom ISR.  Must be called AFTER
+  isrmanager.init so that the default gate has been set up first.
+  ----------------------------------------------------------------------- }
+procedure init;
+begin
+    idt.set_gate(32, uint32(@context_switch_isr), $08, ISR_RING_0);
+    tracer.push_trace('contextswitcher.init');
+end;
 
 end.

src/cpu.pas

@@ -22,7 +22,7 @@ unit cpu;
 interface
 
 uses
-    util, RTC;
+    util, RTC, stdio;
 
 type
     PCapabilities_Old = ^TCapabilities_Old;
@@ -113,12 +113,10 @@ var
     CAP_OLD, CAP_NEW : uint32;
 
 procedure init();
+procedure Terminal_Command_CPU(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
-uses
-    stdio;
-
 procedure getCPUIdentifier;
 var
     id0, id1, id2 : uint32;
@@ -325,7 +323,6 @@ end;
 
 procedure init();
 begin
-    stdio.registerCommand('CPU', @Terminal_Command_CPU, 'CPU Info.');
     CPUID.Capabilities0:= PCapabilities_Old(@CAP_OLD);
     CPUID.Capabilities1:= PCapabilities_New(@CAP_NEW); 
     getCPUIdentifier;

src/driver/bus/usb/usbcore.pas

@@ -158,6 +158,9 @@ procedure init;
 { Unit Tests }
 procedure UnitTest;
 
+{ Terminal command }
+procedure terminal_command_usb(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+
 implementation
 
 { ========================= Globals ========================= }
@@ -954,11 +957,14 @@ end;
 procedure usb_check_hotplug;
 var
     i    : uint32;
+    count: uint32;
     hc   : PUSBHCDriver;
     port : uint8;
 begin
     if HCList = nil then exit;
-    for i := 0 to LL_Size(HCList) - 1 do begin
+    count := LL_Size(HCList);
+    if count = 0 then exit;
+    for i := 0 to count - 1 do begin
         hc := PUSBHCDriver(LL_Get(HCList, i));
         if (hc <> nil) and hc^.PortChangePending then begin
             hc^.PortChangePending := false;
@@ -1100,7 +1106,6 @@ begin
     CompletionHookCount := 0;
     for i := 0 to MAX_COMPLETION_HOOKS - 1 do
         CompletionHooks[i] := nil;
-    stdio.registerCommand('USB', @terminal_command_usb, 'USB subsystem information.');
     syslog.logln('USB Core', 'INIT END.');
     pop_trace;
 end;

src/driver/hid/ps2/ps2_mouse.pas

@@ -119,8 +119,12 @@ var
     x32, y32 : sint32;
     r : pchar;
 begin
+    { mouse_wait(0) checks OBF with a short timeout (100 iterations).
+      When it returns true, data is ready — read it directly with inb($60).
+      Do NOT call mouse_read here: it uses mouse_wait_long (100k iterations)
+      and would spin-block the ISR if the next packet byte hasn't arrived yet. }
     while mouse_wait(0) do begin
-        b := mouse_read;
+        b := inb($60);
         if Cycle = 0 then begin
             if (b AND $08) = $08 then begin
                 Mouse_Byte[Cycle] := b;

src/driver/net/include/nettypes.pas

@@ -256,6 +256,7 @@ type
         OnReceive : TTCPReceiveCallback;
         OnEvent   : TTCPEventCallback;
         UserData  : void;
+        OwnerPID  : uint32;           { PID of owning process, 0 if none }
     end;
 
     TTCB = record

src/driver/net/l3/arp.pas

@@ -25,7 +25,7 @@ uses
     tracer, lmemorymanager,
     util, lists,
     net, nettypes, netutils,
-    eth2, ipv4;
+    eth2, ipv4, stdio;
 
 type
     PARPCacheRecord = ^TARPCacheRecord;
@@ -41,11 +41,12 @@ procedure sendGratuitous;
 procedure sendRequest(ip : puint8);
 procedure send(hType : uint16; pType : uint16; op : uint16; p_context : PPacketContext);
 function resolveIP(ip : puint8) : puint8;
+procedure terminal_command_arp(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
 uses
-    stdio, strings;
+    strings;
 
 var
     Registered : Boolean = false;
@@ -309,7 +310,6 @@ begin
         writeToLogLn('      L3/ARP: register');
         Cache:= LL_New(sizeof(TARPCacheRecord));
         eth2.registerTypePromisc($0806, @recv);
-        stdio.registerCommand('ARP', @terminal_command_arp, 'Get ARP Table.');
         Registered:= true;
     end;
     pop_trace;

src/driver/net/l3/ipv4.pas

@@ -26,17 +26,18 @@ uses
     util, strings,
     net, nettypes, netutils,
     lists,
-    eth2;
+    eth2, stdio;
 
 procedure send(p_data : void; p_len : uint16; p_context : PPacketContext);
 procedure registerProtocol(Protocol_ID : uint8; recv_callback : TRecvCallback);
 function  getIPv4Config : PIPv4Configuration;
 procedure register;
+procedure terminal_command_ifconfig(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
 uses
-    arp, stdio;
+    arp;
 
 var
     Registered : Boolean = false;
@@ -211,7 +212,6 @@ begin
         end;
         Config.UP:= false;
         eth2.registerType($0800, @recv);
-        stdio.registerCommand('IFCONFIG', @terminal_command_ifconfig, 'Configure Network Settings.');
         Registered:= true;
     end;
     pop_trace;

src/driver/net/l4/tcp.pas

@@ -22,7 +22,7 @@ unit tcp;
 interface
 
 uses
-    tracer,
+    tracer, stdio,
     nettypes, netutils,
     ipv4;
 
@@ -33,13 +33,17 @@ function  accept(listener : PTCPSocket) : PTCPSocket;
 function  send(socket : PTCPSocket; p_data : void; p_len : uint16) : TTCPError;
 function  close(socket : PTCPSocket) : TTCPError;
 function  abort_connection(socket : PTCPSocket) : TTCPError;
+procedure terminal_command_tcpconnect(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+procedure terminal_command_tcplisten(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+procedure terminal_command_tcphttp(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
 uses
     lmemorymanager, util, syslog, rand, lists,
     net, TMR_0_ISR, bios_data_area,
-    stdio, strings, arp;
+    strings, arp,
+    processmanager, proctypes;
 
 const
     TCP_PROTOCOL_ID     = $06;
@@ -225,6 +229,7 @@ begin
     sock^.OnReceive := onRecv;
     sock^.OnEvent := onEvt;
     sock^.UserData := userData;
+    sock^.OwnerPID := 0;
     tcb^.Socket := sock;
     CreateSocket := sock;
 end;
@@ -251,10 +256,29 @@ begin
     end;
 end;
 
+procedure socket_cleanup(handle : void);
+var
+    sock : PTCPSocket;
+begin
+    sock := PTCPSocket(handle);
+    if sock = nil then exit;
+    sock^.OwnerPID := 0;  { Prevent DestroySocket from trying to unbind again }
+    abort_connection(sock);
+end;
+
 procedure DestroySocket(sock : PTCPSocket);
+var
+    owner : PProcessContext;
 begin
     push_trace('tcp.DestroySocket');
     if sock <> nil then begin
+        { Remove resource binding from owning process }
+        if sock^.OwnerPID <> 0 then begin
+            owner := processmanager.findByID(sock^.OwnerPID);
+            sock^.OwnerPID := 0;
+            if owner <> nil then
+                processmanager.unbindResourceNoCleanup(owner, void(sock));
+        end;
         if sock^.TCB <> nil then begin
             sock^.TCB^.Socket := nil;
             DestroyTCB(sock^.TCB);
@@ -1369,6 +1393,12 @@ begin
 
     sock := CreateSocket(tcb, context^.OnReceive, context^.OnEvent, context^.UserData);
 
+    { Auto-bind socket to calling process for cleanup on process death }
+    if processmanager.CurrentProcess <> nil then begin
+        sock^.OwnerPID := processmanager.CurrentProcess^.ProcessID;
+        processmanager.bindResource(processmanager.CurrentProcess, rkSocket, void(sock), @socket_cleanup);
+    end;
+
     AddTCB(tcb);
 
     { Send SYN (includes MSS option via SendSegment) }
@@ -1402,6 +1432,13 @@ begin
     if tcb^.BacklogMax = 0 then tcb^.BacklogMax := 5; { default backlog }
 
     sock := CreateSocket(tcb, context^.OnReceive, context^.OnEvent, context^.UserData);
+
+    { Auto-bind socket to calling process for cleanup on process death }
+    if processmanager.CurrentProcess <> nil then begin
+        sock^.OwnerPID := processmanager.CurrentProcess^.ProcessID;
+        processmanager.bindResource(processmanager.CurrentProcess, rkSocket, void(sock), @socket_cleanup);
+    end;
+
     AddTCB(tcb);
 
     listen := sock;
@@ -1866,9 +1903,6 @@ begin
         Connections := DL_New(sizeof(uint32));
         ipv4.registerProtocol(TCP_PROTOCOL_ID, @ProcessPacket);
         TMR_0_ISR.hook(uint32(@TimerTick));
-        stdio.registerCommand('TCPCONNECT', @terminal_command_tcpconnect, 'Connect to a TCP host and send Hello World.');
-        stdio.registerCommand('TCPLISTEN', @terminal_command_tcplisten, 'Listen on a TCP port and log received data.');
-        stdio.registerCommand('TCPHTTP', @terminal_command_tcphttp, 'Send HTTP GET to a host IP (port 80 default).');
         Registered := true;
         syslog.logln('TCP', 'TCP registered.');
     end;

src/driver/storage/storagemanagement.pas

@@ -112,6 +112,7 @@ function get_device_list() : PLinkedListBase;
 procedure register_filesystem(filesystem : PFilesystem);
 
 procedure register_volume(device : PStorage_Device; volume : PStorage_Volume);
+procedure disk_command(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 //function writeNewFile(fileName : pchar; extension : pchar; buffer : puint32; size : uint32) : uint32;
 //function readFile(fileName : pchar; extension : pchar; buffer : puint32; byteCount : puint32) : puint32;
 
@@ -231,7 +232,6 @@ begin
     setworkingdirectory('.');
     storageDevices:= ll_new(sizeof(TStorage_Device));
     fileSystems:= ll_New(sizeof(TFilesystem));
-    stdio.registerCommand('DISK', @disk_command, 'Disk utility');
 
     pop_trace();
 end; 

src/driver/storage/vfs.pas

@@ -104,6 +104,10 @@ function GetDirectories(Handle : uint32; Path : pchar) : PHashMap;
 function PathValid(Path : pchar) : TIsPathValid;
 function changeDirectory(Path : pchar) : TIsPathValid;
 function getWorkingDirectory : pchar;
+function makeAbsolutePathFrom(Path : pchar; BaseDir : pchar) : pchar;
+function resolvePathFrom(Path : pchar; BaseDir : pchar) : TIsPathValid;
+function GetDirectoryListingFrom(Path : pchar; BaseDir : pchar) : PHashMap;
+function changeDirectoryFrom(Path : pchar; BaseDir : pchar; var NewDir : pchar) : TIsPathValid;
 
 //VFS Functions
 function newVirtualDirectory(Path : pchar) : TError;
@@ -608,6 +612,67 @@ begin
     tracer.push_trace('vfs.getWorkingDirectory.exit');
 end;
 
+function makeAbsolutePathFrom(Path : pchar; BaseDir : pchar) : pchar;
+var
+    AbsPath  : pchar;
+    TempPath : pchar;
+begin
+    if Path[0] = '/' then
+        AbsPath := stringCopy(Path)
+    else begin
+        if BaseDir[StringSize(BaseDir)-1] <> '/' then
+            TempPath := StringConcat(BaseDir, '/')
+        else
+            TempPath := stringCopy(BaseDir);
+        AbsPath := StringConcat(TempPath, Path);
+        kfree(void(TempPath));
+    end;
+    makeAbsolutePathFrom := AbsPath;
+end;
+
+function resolvePathFrom(Path : pchar; BaseDir : pchar) : TIsPathValid;
+var
+    TempPath : pchar;
+    AbsPath  : pchar;
+begin
+    TempPath := makeAbsolutePathFrom(Path, BaseDir);
+    AbsPath := evaluatePath(TempPath);
+    kfree(void(TempPath));
+    resolvePathFrom := PathValid(AbsPath);
+    kfree(void(AbsPath));
+end;
+
+function GetDirectoryListingFrom(Path : pchar; BaseDir : pchar) : PHashMap;
+var
+    TempPath : pchar;
+    AbsPath  : pchar;
+begin
+    TempPath := makeAbsolutePathFrom(Path, BaseDir);
+    AbsPath := evaluatePath(TempPath);
+    kfree(void(TempPath));
+    GetDirectoryListingFrom := GetDirectoryListing(AbsPath);
+    kfree(void(AbsPath));
+end;
+
+function changeDirectoryFrom(Path : pchar; BaseDir : pchar; var NewDir : pchar) : TIsPathValid;
+var
+    TempPath : pchar;
+    AbsPath  : pchar;
+    Validity : TIsPathValid;
+begin
+    TempPath := makeAbsolutePathFrom(Path, BaseDir);
+    AbsPath := evaluatePath(TempPath);
+    kfree(void(TempPath));
+    Validity := PathValid(AbsPath);
+    if Validity = pvDirectory then
+        NewDir := AbsPath
+    else begin
+        NewDir := nil;
+        kfree(void(AbsPath));
+    end;
+    changeDirectoryFrom := Validity;
+end;
+
 { Terminal Commands }
 
 procedure VFS_COMMAND_PUSHD(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
@@ -746,11 +811,8 @@ begin
     //outputln('VFS', makeRelative('/test/mydisk/mything', '/test/mydisk'));
     //while true do begin end;
 
-    { Register Terminal Commands }
-    stdio.registerCommand('LS',      @VFS_COMMAND_LS,    'List directory contents.');
-    stdio.registerCommand('CD',      @VFS_COMMAND_CD,    'Set working directory.');
-    stdio.registerCommand('PUSHD',   @VFS_COMMAND_PUSHD, 'Push the working directory.');
-    stdio.registerCommand('POPD',    @VFS_COMMAND_POPD,  'Pop the working directory.');
+    { LS, CD, PUSHD, POPD are now handled as per-terminal builtins
+      in vterminal.pas so each terminal has its own working directory. }
 
     //ht:= PHashMap(Root^.Reference);
     //hashmap.add(ht, 'VDirectory', void(newDummyObject(otVDIRECTORY)));

src/driver/timers/TMR_0_ISR.pas

@@ -13,7 +13,7 @@
 //  limitations under the License.
 
 { 
-	Driver->Timer->TMR_0_ISR - 1024hz Timer Driver.
+	Driver->Timer->TMR_0_ISR - 8khz Timer Driver.
 	
 	@author(Kieron Morris <[email protected]>)
 }
@@ -37,7 +37,7 @@ var
     Hooks : Array[1..MAX_HOOKS] of pp_hook_method;
     Registered : boolean = false;
 
-procedure Main; //IRQ0, 1024.19hz aprox
+procedure Main; //IRQ0, ~8001hz
 var
     i : integer;
 
@@ -54,7 +54,7 @@ procedure register();
 begin
     if not registered then begin
         asm
-            mov ax, 1193
+            mov ax, 149
             out $40, al
             mov al, ah
             out $40, al

src/driver/timers/graphicsrefresh.pas

@@ -1,52 +0,0 @@
-{
-    Driver->Timer->GraphicsRefresh - Timer-driven graphics refresh at ~120FPS.
-
-    Hooks into the 1024Hz timer (TMR_0_ISR) and calls the desktop, uidebug,
-    LVGL and video flush routines every ~9 ticks (1024/9 ≈ 113.8 FPS).
-
-    @author(Kieron Morris <[email protected]>)
-}
-unit graphicsrefresh;
-
-interface
-
-procedure init;
-
-implementation
-
-uses
-    util,
-    TMR_0_ISR,
-    desktop,
-    uidebug,
-    lvgl,
-    video,
-    syslog;
-
-const
-    { 1024 / 4 ≈ 256 FPS }
-    TICKS_PER_FRAME = 4;
-
-var
-    TickCounter : uint32;
-
-procedure on_tick(data : void);
-begin
-    TickCounter := TickCounter + 1;
-    if TickCounter >= TICKS_PER_FRAME then begin
-        TickCounter := 0;
-        desktop.update;
-        uidebug.update;
-        lvgl_handler;
-        video.Flush;
-    end;
-end;
-
-procedure init;
-begin
-    TickCounter := 0;
-    TMR_0_ISR.hook(uint32(@on_tick));
-    syslog.logln('GFXREFRESH', 'Hooked into 1024Hz timer (~120 FPS).');
-end;
-
-end.

src/driver/timers/usbhotplug.pas

@@ -1,46 +0,0 @@
-{
-    Driver->Timer->USBHotplug - Timer-driven USB hotplug polling at ~1Hz.
-
-    Hooks into the 1024Hz timer (TMR_0_ISR) and calls
-    usbcore.usb_check_hotplug every 1024 ticks (approximately once per second).
-
-    @author(Kieron Morris <[email protected]>)
-}
-unit usbhotplug;
-
-interface
-
-procedure init;
-
-implementation
-
-uses
-    util,
-    TMR_0_ISR,
-    usbcore,
-    syslog;
-
-const
-    { 1024 ticks at 1024Hz ≈ 1 second }
-    TICKS_PER_POLL = 1024;
-
-var
-    TickCounter : uint32;
-
-procedure on_tick(data : void);
-begin
-    TickCounter := TickCounter + 1;
-    if TickCounter >= TICKS_PER_POLL then begin
-        TickCounter := 0;
-        usbcore.usb_check_hotplug;
-    end;
-end;
-
-procedure init;
-begin
-    TickCounter := 0;
-    TMR_0_ISR.hook(uint32(@on_tick));
-    syslog.logln('USBHOTPLUG', 'Hooked into 1024Hz timer (~1Hz polling).');
-end;
-
-end.

src/driver/video/desktop.pas

@@ -15,7 +15,7 @@ unit desktop;
 interface
 
 uses
-    lvgl, video, RTC, strings, util, tracer, multiboot, cpu, serial, windows, asuro;
+    lvgl, video, gpu, RTC, strings, util, tracer, multiboot, cpu, serial, windows, asuro;
 
 type
     TProgLaunchProc = procedure;
@@ -25,6 +25,7 @@ procedure registerProgram(name: pchar; launcher: TProgLaunchProc);
 
 procedure init;
 procedure update;
+procedure relayout;
 
 implementation
 
@@ -36,7 +37,7 @@ const
     DOCK_ITEM_H   = 36;
 
     SEARCH_W      = 220;
-    SEARCH_RADIUS = 18;
+    SEARCH_RADIUS = 16;
 
     RESULTS_W     = SEARCH_W;
     RESULTS_ROW_H = 36;
@@ -299,12 +300,12 @@ begin
     addInfoRow(content, cw, 'CPU Clock', clk_str);
     mem_str := stringConcat(intToString(((multibootinfo^.mem_upper + 1000) div 1024) + 1), ' MB');
     addInfoRow(content, cw, 'Memory', mem_str);
-    res_str := stringConcat(intToString(multibootinfo^.framebuffer_width), 'x');
-    res_str := stringConcat(res_str, intToString(multibootinfo^.framebuffer_height));
+    res_str := stringConcat(intToString(video.frontBufferWidth), 'x');
+    res_str := stringConcat(res_str, intToString(video.frontBufferHeight));
     res_str := stringConcat(res_str, 'x');
-    res_str := stringConcat(res_str, intToString(multibootinfo^.framebuffer_bpp));
+    res_str := stringConcat(res_str, intToString(video.frontBufferBpp));
     addInfoRow(content, cw, 'Resolution', res_str);
-    addInfoRow(content, cw, 'Graphics', 'VESA VBE');
+    addInfoRow(content, cw, 'Graphics', gpu.activeDriverName);
 
     addSeparator(content, cw);
 
@@ -677,6 +678,14 @@ begin
         lv_obj_set_pos(results_panel, lv_obj_get_x(results_panel), anim_current_y);
 end;
 
+{ ============================================================
+  Mode-change callback — fired by GPU framework after setMode
+  ============================================================ }
+procedure desktopModeChanged(const info : TGPUModeInfo);
+begin
+    relayout;
+end;
+
 { ============================================================
   Init — create the desktop UI
   ============================================================ }
@@ -819,6 +828,43 @@ begin
     { ---- Register built-in programs ---- }
     registerProgram('System Information', @openSysInfo);
 
+    { Register for resolution-change notifications from GPU framework }
+    gpu.registerModeChangeCallback(@desktopModeChanged);
+
+    tracer.pop_trace;
+end;
+
+{ ============================================================
+  Relayout — reposition all desktop UI after resolution change
+  ============================================================ }
+procedure relayout;
+var
+    scr_w, scr_h : sint32;
+    dock_w       : sint32;
+    dock_x       : sint32;
+    dock_y       : sint32;
+begin
+    tracer.push_trace('desktop.relayout');
+
+    scr_w := sint32(video.frontBufferWidth);
+    scr_h := sint32(video.frontBufferHeight);
+
+    { Close any open search/results first }
+    clearAndClose;
+
+    { Reposition dock }
+    dock_w := scr_w - (DOCK_HPAD * 2);
+    dock_x := DOCK_HPAD;
+    dock_y := scr_h - DOCK_HEIGHT - DOCK_MARGIN;
+    lv_obj_set_size(dock, dock_w, DOCK_HEIGHT);
+    lv_obj_set_pos(dock, dock_x, dock_y);
+
+    { Watermark stays centered (LV_ALIGN_CENTER is relative to parent) }
+    lv_obj_align(desktop_label, LV_ALIGN_CENTER, 0, -30);
+
+    { Force layout recalculation }
+    lv_obj_update_layout(lv_screen_active);
+
     tracer.pop_trace;
 end;
 

src/driver/video/lvgl.pas

@@ -13,7 +13,7 @@ interface
 
 uses
     video, videotypes, color, serial, tracer, lmemorymanager,
-    mouse, keyboard, TMR_0_ISR, util;
+    mouse, keyboard, TMR_0_ISR, util, syslog, gpu;
 
 { ============================================================
   Opaque LVGL pointer types (internal C structs)
@@ -467,6 +467,7 @@ const
     LV_KEY_PREV      = 11;
     LV_KEY_HOME      = 2;
     LV_KEY_END       = 3;
+    LV_KEY_CTRLC     = 128;   { Ctrl+C — terminal interrupt }
 
     { Arc mode }
     LV_ARC_MODE_NORMAL      = 0;
@@ -1669,6 +1670,7 @@ function  lvgl_get_display: Plv_display;
 procedure lvgl_set_mouse_cursor(cursor: Plv_obj);
 function  lvgl_get_ticks: uint32;
 function  lvgl_get_kb_group: Plv_group;
+procedure lvgl_update_resolution(screen_w, screen_h: uint32);
 
 { Color helper (Pascal wrapper for inline C function) }
 function lv_color_make(r, g, b: uint8): lv_color_t;
@@ -1861,6 +1863,16 @@ begin
         exit;
     end;
 
+    { Ctrl+C — inject custom key code so focused terminal can handle it }
+    if key_info.is_down_code and key_info.CTRL_DOWN and (key_info.key_code = ord('c')) then begin
+        next_head := (kb_head + 1) mod KB_BUF_SIZE;
+        if next_head <> kb_tail then begin
+            kb_buf[kb_head] := LV_KEY_CTRLC;
+            kb_head := next_head;
+        end;
+        exit;
+    end;
+
     { Map Asuro key codes to LVGL key codes }
     case key_info.key_code of
         $1B: k := LV_KEY_ESC;
@@ -1898,6 +1910,14 @@ begin
     tick_accumulator := tick_accumulator + 1;
 end;
 
+{ ============================================================
+  GPU mode-change callback — updates LVGL display resolution
+  ============================================================ }
+procedure lvglModeChanged(const info : TGPUModeInfo);
+begin
+    lvgl_update_resolution(info.Width, info.Height);
+end;
+
 { ============================================================
   High-level init
   ============================================================ }
@@ -1951,9 +1971,45 @@ begin
     { Hook 1024Hz timer for accurate LVGL tick }
     TMR_0_ISR.hook(uint32(@lvgl_timer_tick));
 
+    { Register for GPU mode-change notifications so LVGL resolution updates automatically }
+    gpu.registerModeChangeCallback(@lvglModeChanged);
+
     tracer.push_trace('lvgl.init.exit');
 end;
 
+procedure lvgl_update_resolution(screen_w, screen_h: uint32);
+var
+    new_buf : pointer;
+    new_size : uint32;
+
+begin
+    tracer.push_trace('lvgl.update_resolution.enter');
+
+    { Allocate new render buffer for the new width }
+    new_size := screen_w * LV_BUF_LINES * SizeOf(lv_color_t);
+    new_buf := pointer(kalloc(new_size));
+
+    if new_buf <> nil then begin
+        { Free old render buffer }
+        if lv_buf1 <> nil then
+            kfree(lv_buf1);
+
+        lv_buf1 := new_buf;
+        lv_buf1_size := new_size;
+
+        { Update LVGL display resolution and buffers }
+        lv_display_set_resolution(disp, sint32(screen_w), sint32(screen_h));
+        lv_display_set_buffers(disp, lv_buf1, nil,
+            lv_buf1_size, LV_DISPLAY_RENDER_MODE_PARTIAL);
+
+        syslog.logln('LVGL', 'Resolution updated successfully.');
+    end else begin
+        syslog.logln('LVGL', 'Failed to allocate new render buffer.');
+    end;
+
+    tracer.push_trace('lvgl.update_resolution.exit');
+end;
+
 function lvgl_handler: uint32;
 var
     elapsed: uint32;