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Atari coding BBS
| Re: MFP help requested |
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Posted by: Peter
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Apr,03.2007-16:15
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This is how I do it (no, actually, this is how pmdata does it since I always end up stealing his code):
| Disable all interrupts
movew #0x2700,sr
| Save MFP registers used for ACIA interrupt
lea 0xfffffa00:w,a0
btst #6,a0@(0x09)
sne ikbd_ierb
btst #6,a0@(0x15)
sne ikbd_imrb
| Set our MFP routine
movel 0x118:w,old_ikbd
movel #ikbd,0x118:w
bset #6,0xfffffa09:w | IERB
bset #6,0xfffffa15:w | IMRB
| Set relative mouse motion mode
| needed because running a .tos or .ttp program
| disable the mouse (entering VT52 textmode)
moveb #0x08,0xfffffc02.w
| Re-enable interrupts
movew #0x2300,sr
-- Peter
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