add /IGNORE:4216 to HAL link step, add writing and directory listing to the FAT32 driver, add the concept of current working directory to the VFS, add writing to the VFS, more operations in the shell, rename KeCurrentThread to KeGetCurrentThread and add KeGetCurrentProcess, add STATUS_NO_MORE_FILES, change KeFault* to KePanic, add syscalls for writing to files, add a proper syscall to writing to the console, move Screen.Clear to after memory status debug print, add ObjectTypeDir to OBJECT_TYPE, extend kernel32 by file operations and upgrade user32 (and add gdi32) to match windows a bit more closely, change CreateProcessA to accept the first argument as NULL.

code/syscall/syscall_nr.inc

@@ -47,6 +47,11 @@ SYS_OPEN_FILE           EQU 27
 SYS_READ_FILE           EQU 28
 SYS_SEEK_FILE           EQU 29
 SYS_GET_FILE_SIZE       EQU 30
+SYS_WRITE_FILE          EQU 43  ; a0=handle a1=buf a2=size a3=*bytesWritten
+SYS_CREATE_FILE         EQU 44  ; a0=*path  a1=*handleOut
+SYS_DELETE_FILE         EQU 45  ; a0=*path
+SYS_TRUNCATE_FILE       EQU 46  ; a0=handle a1=newSize
+SYS_GET_FILE_POS        EQU 47  ; a0=handle -> current offset
 
 ; Screen
 SYS_SCREEN_BLIT         EQU 31
@@ -70,5 +75,16 @@ SYS_CREATE_PROCESS      EQU 40
 SYS_WAIT_FOR_PROCESS    EQU 41
 SYS_GET_PROCESS_EXIT_CODE EQU 42
 
+; Console output
+SYS_WRITE_CONSOLE       EQU 48
+
+; Directory enumeration
+SYS_OPEN_DIR            EQU 49
+SYS_READ_DIR            EQU 50
+
+; Current Working Directory
+SYS_SET_CWD             EQU 51
+SYS_GET_CWD             EQU 52
+
 ; Sentinel
-SYS_MAX                 EQU 43
+SYS_MAX                 EQU 53

code/syscall/syscall_stubs.asm

@@ -109,6 +109,11 @@ SYSCALL_STUB2 OpenFile,             SYS_OPEN_FILE
 SYSCALL_STUB2 ReadFile,             SYS_READ_FILE
 SYSCALL_STUB2 SeekFile,             SYS_SEEK_FILE
 SYSCALL_STUB2 GetFileSize,          SYS_GET_FILE_SIZE
+SYSCALL_STUB2 WriteFile,            SYS_WRITE_FILE      ; handle, buf, size, *bytesWritten
+SYSCALL_STUB2 CreateFile,           SYS_CREATE_FILE     ; *path, *handleOut
+SYSCALL_STUB2 DeleteFile,           SYS_DELETE_FILE     ; *path
+SYSCALL_STUB2 TruncateFile,         SYS_TRUNCATE_FILE   ; handle, newSize
+SYSCALL_STUB2 GetFilePos,           SYS_GET_FILE_POS    ; handle -> offset
 
 ; ---------------------------------------------------------------------------
 ; Screen
@@ -144,4 +149,21 @@ SYSCALL_STUB2 CreateProcess,        SYS_CREATE_PROCESS
 SYSCALL_STUB2 WaitForProcess,       SYS_WAIT_FOR_PROCESS
 SYSCALL_STUB2 GetProcessExitCode,   SYS_GET_PROCESS_EXIT_CODE
 
+; ---------------------------------------------------------------------------
+; Console output  (white text, for user programs)
+; ---------------------------------------------------------------------------
+SYSCALL_STUB2 WriteConsole,         SYS_WRITE_CONSOLE
+
+; ---------------------------------------------------------------------------
+; Directory enumeration
+; ---------------------------------------------------------------------------
+SYSCALL_STUB2 OpenDir,              SYS_OPEN_DIR
+SYSCALL_STUB2 ReadDir,              SYS_READ_DIR
+
+; ---------------------------------------------------------------------------
+; Current Working Directory
+; ---------------------------------------------------------------------------
+SYSCALL_STUB2 SetCwd,               SYS_SET_CWD
+SYSCALL_STUB2 GetCwd,               SYS_GET_CWD
+
 END