refactor: namespace restructure of entire codebase

Reorganize all source files into a hierarchical namespace structure
with dot-separated unit names matching directory paths.

Major changes:
- src/prog/ -> src/app/ (app.*.pas)
- src/fault/ -> src/arch/x86/fault/ (arch.x86.fault.*.pas)
- src/isr/ -> src/arch/x86/isr/ (arch.x86.isr.*.pas)
- src/include/ -> src/core/ (core.*.pas) + src/arch/x86/
- src/driver/ subtree reorganized with driver.* namespace prefixes
- src/driver/storage/con/ -> src/driver/storage/ctl/ (Windows reserved name fix)
- src/driver/storage/ split into con(ctl)/fs/vol/ subdirectories
- src/driver/net/ flattened from l1-l5 layers to driver.net.*.pas
- kernel.pas -> asuro.pas, faults.pas -> arch.x86.faults.pas
- stdio.pas/syslog.pas -> io/io.stdio.pas, io/io.syslog.pas
- processmanager.pas -> proc/proc.mgr.pas
- lmemorymanager.pas -> memory/memory.heap.pas
- Build scripts moved to toolchain/
- Added compat/ shims for lmemorymanager and types
- Added doc/namespace.md tracking the refactor

197 files changed, 6292 insertions(+), 5526 deletions(-)

src/app/app.base64.pas

@@ -0,0 +1,80 @@
+//  Copyright 2021 Angus C
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	Prog->Base64 - Base64 encode and decode.
+	
+	@author(Angus C <[email protected]>)
+}
+unit app.base64;
+
+interface
+
+uses
+    io.stdio, core.util, arch.x86.util, core.strings, debug.tracer, core.enc.base64, memory.heap;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    input     : pchar;
+    pinput    : pchar;
+    encdec    : pchar;
+    result    : pchar;
+    i         : uInt32;
+    PSize     : uInt32;
+
+begin
+    debug.tracer.push_trace('base64_prog.run');
+    if paramCount(Params) > 1 then begin
+        encdec := getParam(0, Params);
+        if stringEquals(encdec, 'encode') then begin
+            PSize := 0;
+            for i := 1 to ParamCount(params) - 1 do begin
+                PSize := PSize + stringSize(getParam(i, Params));
+            end;
+            Psize := PSize + 1 + (ParamCount(params) - 1);
+            input := pchar(kalloc(PSize));
+            pinput := input;
+            for i := 1 to ParamCount(params) - 1 do begin
+                memcpy(uInt32(getParam(i, Params)), uInt32(pinput), stringSize(getParam(i, Params)));
+                inc(pinput, stringSize(getParam(i, Params)));
+                pinput^ := ' ';
+                inc(pinput);
+            end;
+            dec(pinput);
+            pinput^ := #0;
+            result := b64_encode_str(input);
+            io.stdio.bufWriteStrLn(stdout_buf, result);
+            kfree(void(result));
+        end else if stringEquals(encdec, 'decode') then begin
+            input := getParam(1, Params);
+            result := b64_decode_str(input);
+            io.stdio.bufWriteStrLn(stdout_buf, result);
+            kfree(void(result));
+        end else io.stdio.bufWriteStrLn(stderr_buf, 'Usage: core.enc.base64 <encode/decode> <text>');
+    end else begin
+        io.stdio.bufWriteStrLn(stderr_buf, 'Usage: core.enc.base64 <encode/decode> <text>');
+    end;
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('base64_prog.init');
+    io.stdio.registerCommand('BASE64', @Run, 'Perform Base64 Encode/Decode.');
+end;
+
+end.

src/app/app.dhclient.pas

@@ -0,0 +1,43 @@
+//  Copyright 2021 Kieron Morris
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	Prog->DHClient - DHCP Configuration Management.
+	
+	@author(Kieron Morris <[email protected]>)
+}
+unit app.dhclient;
+
+interface
+
+uses
+    io.stdio, core.util, arch.x86.util, core.strings, debug.tracer, driver.net.dhcp;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+begin
+    debug.tracer.push_trace('dhclient.run');
+    DHCPDiscover();
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('dhclient.init');
+    io.stdio.registerCommand('DHClient', @Run, 'Run the DHCP configuration utility.');
+end;
+
+end.

src/app/app.inio.pas

@@ -0,0 +1,145 @@
+{
+    Prog->app.inio - Inline IO
+
+    Usage:
+        app.inio <file> <       Read file contents to terminal
+        app.inio <file> > text  Write text to file
+
+    @author(Aaron Hance <[email protected]>)
+}
+unit app.inio;
+
+interface
+
+uses
+    io.syslog,
+    memory.heap,
+    driver.storage.types,
+    core.strings,
+    io.stdio,
+    debug.tracer,
+    core.util, arch.x86.util,
+    driver.storage.vfs;
+
+procedure init();
+
+implementation
+
+procedure Run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf: POutBuf);
+var
+    filePath   : pchar;
+    absPath    : pchar;
+    op         : pchar;
+    fError     : driver.storage.types.TError;
+    fHandle    : driver.storage.vfs.TFileHandle;
+    buf        : pchar;
+    bytesRead  : uint32;
+    content    : pchar;
+    part       : pchar;
+    tmp        : pchar;
+    i          : uint32;
+    pCount     : uint32;
+    contentLen : uint32;
+begin
+    debug.tracer.push_trace('inio.run');
+
+    pCount := paramCount(Params);
+    if pCount < 2 then begin
+        io.syslog.writestringln('Usage: app.inio <file> < | app.inio <file> > text');
+        exit;
+    end;
+
+    filePath := getParam(0, Params);
+    op       := getParam(1, Params);
+
+    if filePath = nil then begin
+        io.syslog.writestringln('Error: no file specified.');
+        exit;
+    end;
+    if op = nil then begin
+        io.syslog.writestringln('Error: no operation specified.');
+        exit;
+    end;
+
+    absPath := driver.storage.vfs.MakeAbsolutePath(filePath);
+
+    { ---- READ ---- }
+    if op[0] = '<' then begin
+        fHandle := driver.storage.vfs.OpenFile(absPath, omReadOnly, wmRewrite, @fError);
+        if (fHandle = 0) or (fError <> eNone) then begin
+            io.syslog.writestringln('Error: cannot open file for reading.');
+            kfree(void(absPath));
+            exit;
+        end;
+        buf := pchar(kalloc(32768));
+        memset(uint32(buf), 0, 32768);
+        bytesRead := driver.storage.vfs.ReadFile(fHandle, 0, puint8(buf), 32767);
+        driver.storage.vfs.CloseFile(fHandle);
+
+        if bytesRead > 0 then begin
+            buf[bytesRead] := char(0);
+            io.syslog.writestring(buf);
+            io.syslog.writestringln(' ');
+        end else begin
+            io.syslog.writestringln('(0 bytes read)');
+        end;
+        kfree(puint32(buf));
+    end
+
+    { ---- WRITE ---- }
+    else if op[0] = '>' then begin
+        if pCount < 3 then begin
+            io.syslog.writestringln('Error: no content to write.');
+            kfree(void(absPath));
+            exit;
+        end;
+
+        { Build content string by joining params 2..N with spaces }
+        content := stringCopy(getParam(2, Params));
+        i := 3;
+        while i < pCount do begin
+            part := getParam(i, Params);
+            if part <> nil then begin
+                { content + ' ' + part }
+                tmp := stringConcat(content, ' ');
+                kfree(void(content));
+                content := stringConcat(tmp, part);
+                kfree(void(tmp));
+            end;
+            i := i + 1;
+        end;
+
+        contentLen := stringSize(content);
+
+        { Try read-write rewrite first (existing file) }
+        fHandle := driver.storage.vfs.OpenFile(absPath, omReadWrite, wmRewrite, @fError);
+        if (fHandle = 0) or (fError <> eNone) then begin
+            { Try creating new file }
+            fHandle := driver.storage.vfs.OpenFile(absPath, omWriteOnly, wmNew, @fError);
+        end;
+
+        if (fHandle = 0) or (fError <> eNone) then begin
+            io.syslog.writestringln('Error: cannot open file for writing.');
+            kfree(void(content));
+            kfree(void(absPath));
+            exit;
+        end;
+
+        driver.storage.vfs.WriteFile(fHandle, 0, puint8(content), contentLen);
+        driver.storage.vfs.CloseFile(fHandle);
+        io.syslog.writestringln('Written.');
+        kfree(void(content));
+    end else begin
+        io.syslog.writestringln('Error: operation must be < or >.');
+    end;
+
+    kfree(void(absPath));
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('inio.init');
+    io.stdio.registerCommand('INIO', @Run, 'Inline IO: app.inio <file> < | app.inio <file> > text');
+end;
+
+end.

src/app/app.md5sum.pas

@@ -0,0 +1,54 @@
+//  Copyright 2021 Kieron Morris
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	Prog->MD5Sum - MD5 Checksum of a given string.
+	
+	@author(Kieron Morris <[email protected]>)
+}
+unit app.md5sum;
+
+interface
+
+uses
+    io.stdio, core.util, arch.x86.util, core.strings, debug.tracer, core.enc.md5;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    md5word     : pchar;
+    wordlen     : uint32;
+    MD5_Hash    : PMD5Digest; 
+    i           : uint32;
+
+begin
+    md5word:= getParam(0, Params);
+    wordlen:= stringSize(md5word);
+    MD5_Hash := MD5Buffer(puint8(md5word), wordlen);
+    for i:=0 to 15 do begin
+        io.stdio.bufWriteHexPair(stdout_buf, MD5_Hash^[i]);
+    end;
+    io.stdio.bufWriteStrLn(stdout_buf, ' ');
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('md5sum.init');
+    io.stdio.registerCommand('MD5SUM', @Run, 'Perform MD5SUM on a word.');
+end;
+
+end.

src/app/app.meminfo.pas

@@ -0,0 +1,83 @@
+//  Copyright 2021 Kieron Morris
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	Prog->app.meminfo - Print memory statistics (PMM / LMM).
+	
+	@author(Kieron Morris <[email protected]>)
+}
+unit app.meminfo;
+
+interface
+
+uses
+    io.stdio, arch.x86.multiboot, arch.x86.memory.physical, memory.heap, debug.tracer;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    pmm_total, pmm_free, pmm_used : uint32;
+    lmm_pages, lmm_free           : uint32;
+begin
+    { Multiboot memory info }
+    io.stdio.bufWriteStrLn(stdout_buf, '--- Multiboot ---');
+    io.stdio.bufWriteStr(stdout_buf, 'Lower Memory  : ');
+    io.stdio.bufWriteInt(stdout_buf, multibootinfo^.mem_lower);
+    io.stdio.bufWriteStrLn(stdout_buf, ' KB');
+    io.stdio.bufWriteStr(stdout_buf, 'Upper Memory  : ');
+    io.stdio.bufWriteInt(stdout_buf, multibootinfo^.mem_upper);
+    io.stdio.bufWriteStrLn(stdout_buf, ' KB');
+    io.stdio.bufWriteStr(stdout_buf, 'Total Memory  : ');
+    io.stdio.bufWriteInt(stdout_buf, ((multibootinfo^.mem_upper + 1000) div 1024) + 1);
+    io.stdio.bufWriteStrLn(stdout_buf, ' MB');
+
+    { PMM stats }
+    io.stdio.bufWriteStrLn(stdout_buf, '--- PMM (4 MB blocks) ---');
+    pmm_total := arch.x86.memory.physical.pmm_total_blocks;
+    pmm_free  := arch.x86.memory.physical.pmm_free_blocks;
+    pmm_used  := pmm_total - pmm_free;
+    io.stdio.bufWriteStr(stdout_buf, 'Total Blocks  : ');
+    io.stdio.bufWriteIntLn(stdout_buf, pmm_total);
+    io.stdio.bufWriteStr(stdout_buf, 'Free Blocks   : ');
+    io.stdio.bufWriteIntLn(stdout_buf, pmm_free);
+    io.stdio.bufWriteStr(stdout_buf, 'Used Blocks   : ');
+    io.stdio.bufWriteIntLn(stdout_buf, pmm_used);
+    io.stdio.bufWriteStr(stdout_buf, 'Free Physical : ');
+    io.stdio.bufWriteInt(stdout_buf, pmm_free * 4);
+    io.stdio.bufWriteStrLn(stdout_buf, ' MB');
+
+    { LMM heap stats }
+    io.stdio.bufWriteStrLn(stdout_buf, '--- LMM (Heap) ---');
+    lmm_pages := memory.heap.lmm_page_count;
+    lmm_free  := memory.heap.lmm_total_free;
+    io.stdio.bufWriteStr(stdout_buf, 'Heap Pages    : ');
+    io.stdio.bufWriteIntLn(stdout_buf, lmm_pages);
+    io.stdio.bufWriteStr(stdout_buf, 'Heap Size     : ');
+    io.stdio.bufWriteInt(stdout_buf, lmm_pages * 4);
+    io.stdio.bufWriteStrLn(stdout_buf, ' MB');
+    io.stdio.bufWriteStr(stdout_buf, 'Heap Free     : ');
+    io.stdio.bufWriteInt(stdout_buf, lmm_free div 1024);
+    io.stdio.bufWriteStrLn(stdout_buf, ' KB');
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('meminfo.init');
+    io.stdio.registerCommand('MEMINFO', @Run, 'Print memory statistics (PMM/LMM).');
+end;
+
+end.

src/app/app.mgr.pas

@@ -0,0 +1,86 @@
+//  Copyright 2021 Kieron Morris
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	ProgManager - Central initialization for terminal registered, baked-in programs.
+	
+	@author(Kieron Morris <[email protected]>)
+    @author(Aaron Hance <[email protected]>)
+}
+unit app.mgr;
+
+interface
+
+uses
+    debug.tracer, io.stdio, proc.mgr,
+    //progs
+    app.base64, app.md5sum, app.dhclient, app.vbeinfo, app.testcmd, app.ping, app.meminfo, app.setres,
+    //drivers
+    driver.storage.ctl.ram, driver.mgr,
+    //network
+    driver.net.ipv4, driver.net.arp, driver.net.tcp,
+    //dispatch
+    driver.storage.filedispatch,
+    //wasm
+    app.wasm.runner;
+
+{ Initialize all baked-in programs }
+procedure init();
+
+implementation
+
+uses
+    core.version,
+    //command provider units
+    arch.x86.cpu,
+    app.diskcmd, driver.bus.usb.core, app.diskutil, app.notepad, app.partcmd, app.volcmd;
+
+procedure init();
+begin
+    debug.tracer.push_trace('app.mgr.init');
+
+    { Register commands from provider units }
+    io.stdio.registerCommand('CPU', @arch.x86.cpu.Terminal_Command_CPU, 'CPU Info.');
+    io.stdio.registerCommand('DEV', @driver.mgr.terminal_command_dev, 'Driver Management Interface.');
+    io.stdio.registerCommand('PS', @proc.mgr.terminal_command_ps, 'List running processes.');
+    io.stdio.registerCommand('KILL', @proc.mgr.terminal_command_kill, 'Force-kill a process by PID.');
+    io.stdio.registerCommand('TERMINATE', @proc.mgr.terminal_command_terminate, 'Gracefully terminate a process by PID.');
+    io.stdio.registerCommand('ARP', @driver.net.arp.terminal_command_arp, 'Get ARP Table.');
+    io.stdio.registerCommand('IFCONFIG', @driver.net.ipv4.terminal_command_ifconfig, 'Configure Network Settings.');
+    io.stdio.registerCommand('TCPCONNECT', @driver.net.tcp.terminal_command_tcpconnect, 'Connect to a TCP host and send Hello World.');
+    io.stdio.registerCommand('TCPLISTEN', @driver.net.tcp.terminal_command_tcplisten, 'Listen on a TCP port and log received data.');
+    io.stdio.registerCommand('TCPHTTP', @driver.net.tcp.terminal_command_tcphttp, 'Send HTTP GET to a host IP (port 80 default).');
+    io.stdio.registerCommand('USB', @driver.bus.usb.core.terminal_command_usb, 'driver.bus.usb subsystem information.');
+
+    { Initialize baked-in programs }
+    app.diskcmd.init();
+    app.partcmd.init();
+    app.volcmd.init();
+    app.diskutil.init();
+    app.notepad.init();
+    app.md5sum.init();
+    app.base64.init();
+    app.dhclient.init();
+    app.vbeinfo.init();
+    app.testcmd.init();
+    app.ping.init();
+    app.meminfo.init();
+    { File dispatch & WASM integration }
+    driver.storage.ctl.ram.init();
+    driver.storage.filedispatch.init();
+    app.wasm.runner.init();
+    app.setres.init();
+end;
+
+end.

src/app/app.ping.pas

@@ -0,0 +1,145 @@
+{
+    Prog->Ping - ICMP Ping command.
+
+    Sends 10 ICMP echo requests to a host, printing round-trip time
+    for each reply. Sleeps 1 second between pings. Each invocation
+    uses a heap-allocated state record so multiple terminals can app.ping
+    concurrently without corrupting each other.
+
+    @author(Kieron Morris <[email protected]>)
+}
+unit app.ping;
+
+interface
+
+uses
+    io.stdio, debug.tracer;
+
+procedure init();
+
+implementation
+
+uses
+    arch.x86.bda, driver.net.types, driver.net.icmp, driver.net.util, core.strings,
+    proc.mgr, core.util, arch.x86.util, memory.heap;
+
+const
+    PING_TIMEOUT_MS = 5000;  { 5-second timeout per app.ping }
+
+type
+    TPingResult = (prWaiting, prGotReply, prGotError);
+    PPingState  = ^TPingState;
+    TPingState  = record
+        Result      : TPingResult;
+        ReplyTimeMS : uint64;
+        ErrorReason : TARPErrorCode;
+        SendTime    : uint64;
+    end;
+
+{ ---- ICMP callbacks (called from network recv context) ---- }
+
+procedure on_reply(hdr : PICMPHeader; userData : void);
+var
+    st : PPingState;
+    t2 : uint64;
+begin
+    st := PPingState(userData);
+    if st = nil then exit;
+    t2 := Counters.c64;
+    st^.ReplyTimeMS := t2 - st^.SendTime;
+    st^.Result := prGotReply;
+end;
+
+procedure on_error(hdr : PICMPHeader; Reason : TARPErrorCode; userData : void);
+var
+    st : PPingState;
+begin
+    st := PPingState(userData);
+    if st = nil then exit;
+    st^.ErrorReason := Reason;
+    st^.Result := prGotError;
+end;
+
+{ ---- Command entry point (runs as a process) ---- }
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    ip_str   : pchar;
+    ip       : puint8;
+    i        : uint16;
+    st       : PPingState;
+    tStart   : uint32;
+    tNow     : uint32;
+    elapsed  : uint32;
+    timeoutTicks : uint32;
+begin
+    if ParamCount(Params) < 1 then begin
+        io.stdio.bufWriteStrLn(stderr_buf, 'Usage: PING <ip>');
+        exit;
+    end;
+
+    ip_str := getParam(0, Params);
+    ip := stringToIPv4(ip_str);
+    if ip = nil then begin
+        io.stdio.bufWriteStrLn(stderr_buf, 'Invalid IP address.');
+        exit;
+    end;
+
+    { Allocate per-invocation state so concurrent pings are safe }
+    st := PPingState(kalloc(sizeof(TPingState)));
+    timeoutTicks := (PING_TIMEOUT_MS * 1024) div 1000;
+
+    for i := 0 to 9 do begin
+        { Send ICMP echo request }
+        st^.Result := prWaiting;
+        st^.SendTime := Counters.c64;
+        driver.net.icmp.sendICMPRequest(ip, i, 128, @on_reply, @on_error, void(st));
+
+        { Spin-yield until callback fires or timeout }
+        tStart := Counters.c32;
+        while st^.Result = prWaiting do begin
+            proc.mgr.proc_yield;
+            tNow := Counters.c32;
+            if tNow >= tStart then
+                elapsed := tNow - tStart
+            else
+                elapsed := ($FFFFFFFF - tStart) + tNow + 1;
+            if elapsed >= timeoutTicks then begin
+                st^.Result := prGotError;
+                st^.ErrorReason := aecTimeout;
+                break;
+            end;
+        end;
+
+        { Display result }
+        if st^.Result = prGotReply then begin
+            io.stdio.bufWriteStr(stdout_buf, 'Ping Reply: ');
+            io.stdio.bufWriteInt(stdout_buf, st^.ReplyTimeMS);
+            io.stdio.bufWriteStrLn(stdout_buf, 'ms.');
+        end else begin
+            io.stdio.bufWriteStr(stderr_buf, 'Ping Error: ');
+            case st^.ErrorReason of
+                aecFailedToResolveHost: io.stdio.bufWriteStrLn(stderr_buf, 'Failed to resolve host.');
+                aecNoRouteToHost:       io.stdio.bufWriteStrLn(stderr_buf, 'No route to host.');
+                aecTimeout:             io.stdio.bufWriteStrLn(stderr_buf, 'Timeout expired.');
+                aecTTLExpired:          io.stdio.bufWriteStrLn(stderr_buf, 'TTL Expired.');
+            end;
+        end;
+
+        { Sleep 1 second between pings (except after last) }
+        if i < 9 then
+            proc.mgr.proc_sleep_ms(1000);
+    end;
+
+    { Clean up }
+    kfree(void(st));
+    kfree(void(ip));
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('ping.init');
+    io.stdio.registerCommand('PING', @run, 'Ping a host.');
+end;
+
+end.

src/app/app.setres.pas

@@ -0,0 +1,83 @@
+{
+    Prog->app.setres - Set display resolution via GPU driver framework.
+
+    Usage: SETRES <width> <height>
+    Example: SETRES 1024 768
+
+    Uses the GPU driver framework to switch display modes. Tries BGA first,
+    then falls back to VBE/VESA.
+
+    @author(Kieron Morris <[email protected]>)
+}
+unit app.setres;
+
+interface
+
+uses
+    io.stdio, driver.video.gpu, core.util, arch.x86.util, core.strings, debug.tracer, io.syslog;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    w, h : uint32;
+    wStr, hStr : pchar;
+    info : TGPUModeInfo;
+
+begin
+    debug.tracer.push_trace('setres.run');
+
+    if paramCount(params) < 2 then begin
+        io.stdio.bufWriteStrLn(stderr_buf, 'Usage: SETRES <width> <height>');
+        io.stdio.bufWriteStrLn(stderr_buf, 'Example: SETRES 1024 768');
+        debug.tracer.pop_trace;
+        exit;
+    end;
+
+    wStr := getParam(0, params);
+    hStr := getParam(1, params);
+
+    w := stringToInt(wStr);
+    h := stringToInt(hStr);
+
+    if (w = 0) or (h = 0) then begin
+        io.stdio.bufWriteStrLn(stderr_buf, 'Error: Invalid resolution values.');
+        debug.tracer.pop_trace;
+        exit;
+    end;
+
+    io.stdio.bufWriteStr(stdout_buf, 'Setting resolution to ');
+    io.stdio.bufWriteInt(stdout_buf, w);
+    io.stdio.bufWriteStr(stdout_buf, 'x');
+    io.stdio.bufWriteInt(stdout_buf, h);
+    io.stdio.bufWriteStrLn(stdout_buf, 'x32...');
+
+    { Step 1: Set display mode via GPU framework (tries BGA first, then VBE) }
+    if not driver.video.gpu.setMode(w, h, 32, info) then begin
+        io.stdio.bufWriteStrLn(stderr_buf, 'Error: Mode switch failed. Mode may not be supported.');
+        debug.tracer.pop_trace;
+        exit;
+    end;
+
+    io.stdio.bufWriteStr(stdout_buf, 'Mode set via ');
+    io.stdio.bufWriteStrLn(stdout_buf, driver.video.gpu.activeDriverName());
+
+    io.stdio.bufWriteStr(stdout_buf, 'Resolution set to ');
+    io.stdio.bufWriteInt(stdout_buf, w);
+    io.stdio.bufWriteStr(stdout_buf, 'x');
+    io.stdio.bufWriteInt(stdout_buf, h);
+    io.stdio.bufWriteStrLn(stdout_buf, 'x32 successfully.');
+
+    debug.tracer.pop_trace;
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('setres.init');
+    io.stdio.registerCommand('SETRES', @Run, 'Set display resolution. Usage: SETRES <width> <height>');
+    debug.tracer.pop_trace;
+end;
+
+end.

src/app/app.testcmd.pas

@@ -0,0 +1,42 @@
+{
+    Prog->TestCmd - Test command that prints 5 lines with 1-second delays.
+
+    Demonstrates a long-running command that writes incrementally to stdout.
+
+    @author(Kieron Morris <[email protected]>)
+}
+unit app.testcmd;
+
+interface
+
+uses
+    io.stdio, proc.mgr, debug.tracer;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    i : uint32;
+begin
+    for i := 1 to 5 do begin
+        case i of
+            1: io.stdio.bufWriteStrLn(stdout_buf, 'Test output 1 of 5');
+            2: io.stdio.bufWriteStrLn(stdout_buf, 'Test output 2 of 5');
+            3: io.stdio.bufWriteStrLn(stdout_buf, 'Test output 3 of 5');
+            4: io.stdio.bufWriteStrLn(stdout_buf, 'Test output 4 of 5');
+            5: io.stdio.bufWriteStrLn(stdout_buf, 'Test output 5 of 5');
+        end;
+        if i < 5 then
+            proc.mgr.proc_sleep_ms(1000);
+    end;
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('testcmd.init');
+    io.stdio.registerCommand('TEST', @run, 'Print 5 lines with 1-second delays.');
+end;
+
+end.

src/app/app.vbeinfo.pas

@@ -0,0 +1,47 @@
+//  Copyright 2021 Kieron Morris
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	Prog->app.vbeinfo - Print out app.vbeinfo (VESA VGA).
+	
+	@author(Kieron Morris <[email protected]>)
+}
+unit app.vbeinfo;
+
+interface
+
+uses
+    io.stdio, driver.video, core.util, arch.x86.util, core.strings, debug.tracer;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+begin
+    io.stdio.bufWriteStr(stdout_buf, 'Pixel Width: ');
+    io.stdio.bufWriteIntLn(stdout_buf, driver.video.frontBufferWidth);
+    io.stdio.bufWriteStr(stdout_buf, 'Pixel Height: ');
+    io.stdio.bufWriteIntLn(stdout_buf, driver.video.frontBufferHeight);
+    io.stdio.bufWriteStr(stdout_buf, 'Bits Per Pixel: ');
+    io.stdio.bufWriteIntLn(stdout_buf, driver.video.frontBufferBpp);
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('vbeinfo.init');
+    io.stdio.registerCommand('VBEINFO', @Run, 'Print out app.vbeinfo (VESA VGA).');
+end;
+
+end.