valter/dosbox-staging
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Add support for Print Screen key and interrupt. The keypress allows Descent 1 and 2 ingame screenshot feature to be used, the keypress and interrupt allow the Horror Hotel (TSR text adventure) hotkey to work, and the compatible interrupt handler location fixes a game bug in The Forgotten Land.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3961
This commit is contained in:
ripsaw8080 2016-02-05 13:41:22 +00:00
parent 18f5c4c565
commit 26dd1635b5
5 changed files with 39 additions and 2 deletions
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10
src/cpu/callback.cpp
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@ -256,7 +256,15 @@ Bitu CALLBACK_SetupExtra(Bitu callback, Bitu type, PhysPt physAddress, bool use_
phys_writew(physAddress+0x0b,(Bit16u)0x20e6); // out 0x20, al
phys_writeb(physAddress+0x0d,(Bit8u)0x58); // pop ax
phys_writeb(physAddress+0x0e,(Bit8u)0xcf); //An IRET Instruction
return (use_cb?0x15:0x0f);
phys_writeb(physAddress+0x0f,(Bit8u)0xfa); // cli
phys_writew(physAddress+0x10,(Bit16u)0x20b0); // mov al, 0x20
phys_writew(physAddress+0x12,(Bit16u)0x20e6); // out 0x20, al
phys_writeb(physAddress+0x14,(Bit8u)0x55); // push bp
phys_writew(physAddress+0x15,(Bit16u)0x05cd); // int 5
phys_writeb(physAddress+0x17,(Bit8u)0x5d); // pop bp
phys_writeb(physAddress+0x18,(Bit8u)0x58); // pop ax
phys_writeb(physAddress+0x19,(Bit8u)0xcf); //An IRET Instruction
return (use_cb?0x20:0x1a);
case CB_IRQ9: // pic cascade interrupt
if (use_cb) {
phys_writeb(physAddress+0x00,(Bit8u)0xFE); //GRP 4