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9 daniel-mar 1 
 
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; Aysalia DOS Launcher
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; DOS Stub for AyDos.exe fat binary
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; Revision 2018-12-01
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; (C) 2018 Daniel Marschall, ViaThinkSoft
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.model tiny
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.code
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org 100h
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start:
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jmp real_start
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    exename1  db "AYDOS.MNU",0
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    cmdargs   db 0,'',0dh
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    dummy_fcb db 36 dup(0)
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    paramblk  dw 0          ; use environment of parent
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              dw cmdargs    ; command line arguments
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              dw 0          ; cmdargs_seg
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              dw dummy_fcb  ; fcb1
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              dw 0          ; fcb1_seg
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              dw dummy_fcb  ; fcb2
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              dw 0          ; fcb2_seg
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real_start:
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    ; Reduce size of own application to give the called applications more space
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    ; TODO: Is that required for a COM file?
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    mov     ah, 4ah
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    mov     al, 00h    
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    mov     bx, 50        ; 50 paragraphs a 16 byte = 800 byte
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    int     21h
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    ; Start Menu
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    mov     ah, 4bh   ; execute
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    mov     al, 00h   ; load and execute
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    mov     bx, paramblk
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    lea     dx, exename1
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    int     21h
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    ; Return to DOS
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    mov     ah, 4ch
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    mov     al, 00h
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    int     21h
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end start