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Revision of some comments

This commit is contained in:
Markus Gans 2019-04-28 20:57:08 +02:00
parent 83fbc0a4f5
commit 5bd8590dee
1 changed files with 9 additions and 6 deletions
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15
src/ftermlinux.cpp
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@ -746,13 +746,15 @@ uChar FTermLinux::readAttributeController (uChar index)
const uInt16 input_status_1 = getInputStatusRegisterOne();
inb (input_status_1); // switch to index mode
outb (index & 0x1f, attrib_cntlr_write);
res = inb (attrib_cntlr_read);
outb (index & 0x1f, attrib_cntlr_write); // selects address register
res = inb (attrib_cntlr_read); // read from data register
inb (input_status_1); // switch to data mode
// Disable access to the palette and unblank the display
inb (input_status_1); // switch to index mode
index = (index & 0x1f) | 0x20; // set bit 5 (enable display)
outb (index, attrib_cntlr_write);
inb (attrib_cntlr_read);
return res;
}
@ -766,10 +768,11 @@ void FTermLinux::writeAttributeController (uChar index, uChar data)
const uInt16 input_status_1 = getInputStatusRegisterOne();
inb (input_status_1); // switch to index mode
outb (index & 0x1f, attrib_cntlr_write);
outb (data, attrib_cntlr_write);
outb (index & 0x1f, attrib_cntlr_write); // selects address register
outb (data, attrib_cntlr_write); // write to data register
inb (input_status_1); // switch to data mode
// Disable access to the palette and unblank the display
inb (input_status_1); // switch to index mode
index = (index & 0x1f) | 0x20; // set bit 5 (enable display)
outb (index, attrib_cntlr_write);
outb (data, attrib_cntlr_write);