flat assembler
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me239 10 Jul 2011, 05:11
Well, I thought it was about time I update my xOS since I haven't worked on it in about a year, so here it is. NEW FEATURES:
*FAT12 read and execution *10 API's via int 21h and 20h Interrupts: *INT 20H* No parameters, ends program *INT 21h* *MessageBox (Creates a red messagebox in the center of the screen with text) AH = 01 DS:SI = location of message ---------------------------------- *Create fullscreen box with status bar AH = 02 DH = top and bottom status bar color DL = foreground color DS:SI = text to printed to status bar --------------------------------- *Print string AH = 03 DS:SI = location of NULL terminated string --------------------------------- *Clear-screen AH = 04 --------------------------------- *Allocate TSR memory block AH = 05 CX = number of paragraphs to be allocated +1 for rounding return: AX = new segment for tsr block -------------------------------- *Hook interrupt AH = 06 AL = Interrupt number BX = Segment of handler DX = Offset of handler -------------------------------- *Read/execute file AH = 07 AL = 1 for read file or 2 for execute file DS:BX = segment and offset to read or execute file into DS:SI = location of file name to load ------------------------------- *Print character to STDOUT AH = 08 AL = character ------------------------------- *Get Interrupt handler AH = 09 AL = Interrupt number Returns: AX = handler offset BX = handler segment I know it still needs improvement, but I think it still looks pretty nice for a couple of hours of work. EXAMPLE PROGRAMS: The floppy includes a few sample programs to demonstrate xOS's API's TEST.COM, creates a window, reads the first 50 characters of TEST.TXT, waits for keypress, and then displays a message box HELLO.COM basic hello world application PIC.COM sample Bitmap program for mode 13h VID.COM allows users to change video modes with a keypress FAT.COM reads first 50 characters of TEST.TXT to STDOUT TSRTEST.COM tests interrupts 22h & 23h TSR.COM hooks interrupt 22h, loads itself to upper memory, and reports new segment in decimal TSR2.COM same as TSR.COM, but hooks 23h TSR3.COM example of hooking kernel interrupt 21h CMD.COM kernel. Cannot be executed by user SMILE.COM smiley application W.COM my impression of a VBDOS application with ASCII windows and buttons
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10 Jul 2011, 05:11 |
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