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Flaw in ROM — Parallax Forums

Flaw in ROM

KyeKye Posts: 2,200
edited 2010-08-11 19:11 in Propeller 1
One of the ROM characters is flawed.

The "┘" character displays improperly. The bottom right portion of the line is too thin and when you draw it attached to other lines it is easy to notice that there are pixels missing from the tile.

Try displaying DEC 144 followed by DEC 156 right after one another.

Comments

  • kuronekokuroneko Posts: 3,623
    edited 2010-08-11 17:51
    Your thread title suggests an on-chip issue rather than Parallax font usage on the computer. While I noticed the issue on the latter (12pt is fine, 14pt shows a gap) the ROM definitions look fine to me.

    This is a ROM dump (taken this morning) for characters 156/157 ($9C/$9D). Where do you think the flaw is?
    addr    data       odd rows        even rows
------------------------------------------------
A700: 0003C000 0000000110000000 0000000110000000
A704: 0003C000 0000000110000000 0000000110000000
A708: 0003C000 0000000110000000 0000000110000000
A70C: 0003C000 0000000110000000 0000000110000000
A710: 0003C000 0000000110000000 0000000110000000
A714: 0003C000 0000000110000000 0000000110000000
A718: 0003C000 0000000110000000 0000000110000000
A71C: 0003C000 0000000110000000 0000000110000000
A720: 0003C000 0000000110000000 0000000110000000
A724: 0003C000 0000000110000000 0000000110000000
A728: 0003C000 0000000110000000 0000000110000000
A72C: 0003C000 0000000110000000 0000000110000000
A730: 0003C000 0000000110000000 0000000110000000
A734: 0003C000 0000000110000000 0000000110000000
A738: 0003C000 0000000110000000 0000000110000000
A73C: AAABD555 1111111110000000 0000000111111111
A740: AAABD555 1111111110000000 0000000111111111
A744: 00000000 0000000000000000 0000000000000000
 ..
A77C: 00000000 0000000000000000 0000000000000000
  • KyeKye Posts: 2,200
    edited 2010-08-11 19:11
    Hmm, I just did a hexdump to... Okay, I retract my statment.

    Well, I mentioned this because when I display that character on screen it does not look correct. I tried displaying the character on serval different monitors and it looked flawed on all of them.

    I originally though it was my code that was bad, but I checked many of the other characters and they all displayed correctly.

    ...Mmm, I'll look into this more.

    ...It also seemd I can't change the title of this thread.
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