Really good article! Personally it has me convinced that the 0x7F character was originally meant to be a delta, but whoever drew it did a poor enough job that it made other teams at IBM think it was supposed to be a house. As the article says, when you look in the PC BIOS source listing, there's a comment saying "DELTA" next to where the bitmap for the 0x7F character is defined. https://github.com/philspil66/IBM-PC-BIOS/blob/main/PCBIOS.A...
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Really good article! Personally it has me convinced that the 0x7F character was originally meant to be a delta, but whoever drew it did a poor enough job that it made other teams at IBM think it was supposed to be a house. As the article says, when you look in the PC BIOS source listing, there's a comment saying "DELTA" next to where the bitmap for the 0x7F character is defined. https://github.com/philspil66/IBM-PC-BIOS/blob/main/PCBIOS.A...