[TI-H] Re: TI-89 HW2 overclocking
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[TI-H] Re: TI-89 HW2 overclocking
Quite odd that HW2 uses SRAM with a slower access time, but is it
faster, or does a freed DMA account for the speed B.A. found?
Greg Dietsche wrote:
> The HW1's read the LCD memory constantly (DMA)... that of course uses
> up bus bandwidth... on HW2's, the lcd memory is mirrored, and because
> of that, there is no need to snoop for the lcd mem so the bus is freed
> up for other tasks.
>
> Regards,
> Greg Dietsche
> GForce Programming: http://calc.gregd.org
> Detached Solutions: http://www.detachedsolutions.com
>
> ----- Original Message -----
> From: B.A. Baracus <mailto:babaracus@bellsouth.net>
> To: ti-hardware@lists.ticalc.org <mailto:ti-hardware@lists.ticalc.org>
> Sent: Sunday, February 23, 2003 10:03 PM
> Subject: [TI-H] Re: TI-89 HW2 overclocking
>
> On Sun, 23 Feb 2003 21:53:11 -0500, Nick Peaden
> <Nitrocloud@earthlink.net <mailto:Nitrocloud@earthlink.net>>
> wrote:
> > Anyway, there may be other factors in HW2 calcs that may make it
> faster.
> > Are the RAM, ROM chips the same, and how about all other chips,
> > capacitors, etc.?
>
> I do know that the HW1 uses 70ns SRAM while the HW2 uses 85ns SRAM.
>
> --
> B.A. Baracus
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