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Nyef
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Initial VDP register values?
 Posted: Wed Dec 01, 1999 3:09 am
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What are the initial values for the VDP regs on the SMS?
I know I've seen them before, but the information never seems to make it's way into a document in any technical area, and posts to message boards tend to disappear after a while...
--Nyef
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- Joined: 24 Jun 1999
- Posts: 1732
- Location: Paris, France
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Posted: Wed Dec 01, 1999 5:38 am
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Quote > What are the initial values for the VDP regs on the SMS?
> I know I've seen them before, but the information never seems to make it's way into a document in any technical area, and posts to message boards tend to disappear after a while...
0x36, 0xA0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFB, 0x00, 0x00, 0x00, 0xFF
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- Joined: 24 Jun 1999
- Posts: 1732
- Location: Paris, France
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Posted: Wed Dec 01, 1999 5:39 am
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Quote >> What are the initial values for the VDP regs on the SMS?
>> I know I've seen them before, but the information never seems to make it's way into a document in any technical area, and posts to message boards tend to disappear after a while...
> 0x36, 0xA0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFB, 0x00, 0x00, 0x00, 0xFF
But truly, no games should depends on them.
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Nyef
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Posted: Wed Dec 01, 1999 1:35 pm
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Quote > >> What are the initial values for the VDP regs on the SMS?
> >> I know I've seen them before, but the information never seems to make it's way into a document in any technical area, and posts to message boards tend to disappear after a while...
> > 0x36, 0xA0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFB, 0x00, 0x00, 0x00, 0xFF
> But truly, no games should depends on them.
Terminator turns on the screen without setting register 2 (nametable), and that caused a SIGSEGV on DarcNES. Better safe...
--Nyef
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- Joined: 24 Jun 1999
- Posts: 1732
- Location: Paris, France
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Posted: Wed Dec 01, 1999 3:21 pm
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Quote >>>> What are the initial values for the VDP regs on the SMS?
>>>> I know I've seen them before, but the information never seems to make it's way into a document in any technical area, and posts to message boards tend to disappear after a while...
>>> 0x36, 0xA0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFB, 0x00, 0x00, 0x00, 0xFF
>> But truly, no games should depends on them.
> Terminator turns on the screen without setting register 2 (nametable), and that caused a SIGSEGV on DarcNES. Better safe...
SMS or GG version of Terminator?
If it is the SMS one, I'll try to run it on a Game Gear with the Master Gear converter - I'm not quite sure the GG has the default values.
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Nyef
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Posted: Wed Dec 01, 1999 3:52 pm
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Quote > SMS or GG version of Terminator?
> If it is the SMS one, I'll try to run it on a Game Gear with the Master Gear converter - I'm not quite sure the GG has the default values.
SMS version, as downloaded from emucamp.
I don't know if it sets the nametable after the screen is activated, but it definately doesn't do it beforehand.
--Nyef
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