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Author Topic: nDoom - 8bpp bug, sleep mode bug [SOLVED]  (Read 9753 times)

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Offline DJ Omnimaga

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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #15 on: February 05, 2011, 12:11:22 am »
Glad to hear the bugs were fixed! :D
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Offline Lionel Debroux

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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #16 on: February 09, 2011, 11:31:45 am »
Is reading from the SDRAM as fast as reading from the internal SRAM (where the default screen location is mapped), BTW ?
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Offline calc84maniac

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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #17 on: February 09, 2011, 11:41:07 am »
It should be faster if it's on a cached area (which most of SDRAM is). You have to be careful with putting the screen buffer on a cached area though, because the LCD controller reads directly from memory. If the cached data isn't flushed to the memory, those parts of the screen won't update.
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Offline Lionel Debroux

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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #18 on: February 09, 2011, 12:43:09 pm »
Yeah, when going back to the flat, I was thinking about caching getting in the way...
DMA by the LCD controller steals some bandwidth, but they make it possible to switch screens more efficiently than bus snoop. The TI-68k platform has had both kinds of LCD controllers over time: DMA first (HW1, before 1999), bus snoop later (HW2+, from 1999).
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Offline DJ Omnimaga

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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #19 on: February 13, 2011, 03:02:35 pm »
Yeah, I remember all grayscale games stopped working when HW2 came out then in ticalc news there was speculation about if GS was even possible at all on HW2 calcs.
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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #20 on: April 28, 2011, 07:53:13 pm »
I wish I still had my old TI-89 from 1998.
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Offline DJ Omnimaga

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Re: nDoom - 8bpp bug, sleep mode bug [SOLVED]
« Reply #21 on: May 11, 2011, 06:14:01 pm »
Those were the best, even if they ran at 10 MHz instead of 12. I wish TI didn't keep changing the hardware in their calcs over time, it causes programs to stop working completely from an hardware to another. X.x

That said on HW1 you had to make sure to update to the latest OS, though, because almost nothing works under OS 1.xx.
« Last Edit: May 11, 2011, 06:14:36 pm by DJ_O »
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