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Add basic delay to a few dos games to improve their timing. TSR use global psp. (rc3 changes)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3589
This commit is contained in:
Peter Veenstra 2010-05-02 07:16:15 +00:00
parent 685c253690
commit cc6785acea
2 changed files with 34 additions and 2 deletions
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8
src/cpu/callback.cpp
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@ -423,7 +423,13 @@ Bitu CALLBACK_SetupExtra(Bitu callback, Bitu type, PhysPt physAddress, bool use_
}
phys_writeb(physAddress+0x01,(Bit8u)0xCF); //An IRET Instruction
phys_writeb(physAddress+0x02,(Bit8u)0xCB); //A RETF Instruction
return (use_cb?7:3);
phys_writeb(physAddress+0x03,(Bit8u)0x51); // push cx
phys_writeb(physAddress+0x04,(Bit8u)0xB9); // mov cx,
phys_writew(physAddress+0x05,(Bit16u)0x0140); // 0x140
phys_writew(physAddress+0x07,(Bit16u)0xFEE2); // loop $-2
phys_writeb(physAddress+0x09,(Bit8u)0x59); // pop cx
phys_writeb(physAddress+0x0A,(Bit8u)0xCF); //An IRET Instruction
return (use_cb?15:11);
default:
E_Exit("CALLBACK:Setup:Illegal type %d",type);