[TI-H] Re: TI-89 HW2 overclocking [OT]
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[TI-H] Re: TI-89 HW2 overclocking [OT]
Yeah, talking about bandwidth...
Ticalc.org used to strip any weird things off the list e-mails? Anyone
knowing why they're not doing it anymore?
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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 -----=20
From: B.A. Baracus=20
To: ti-hardware@lists.ticalc.org=20
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>=20
wrote:
> Anyway, there may be other factors in HW2 calcs that may make it =
faster.=20
> Are the RAM, ROM chips the same, and how about all other chips,=20
> capacitors, etc.?
I do know that the HW1 uses 70ns SRAM while the HW2 uses 85ns SRAM.
--=20
B.A. Baracus
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<DIV><FONT face=3DArial size=3D2>The HW1's read the LCD memory =
constantly (DMA)...=20
that of course uses up bus bandwidth... on HW2's, the lcd memory is =
mirrored,=20
and because of that, there is no need to snoop for the lcd mem so the =
bus is=20
freed up for other tasks.</FONT></DIV>
<DIV>
<P>Regards,<BR><I><B><FONT face=3D"Monotype Corsiva" color=3D#000080 =
size=3D5>Greg=20
Dietsche</FONT><B></I><BR><FONT face=3DArial size=3D2><B>GForce=20
Programming:</B> <A=20
href=3D"http://calc.gregd.org">http://calc.gregd.org</A><BR><B>Detached=20
Solutions:</B> <A=20
href=3D"http://www.detachedsolutions.com">http://www.detachedsolutions.co=
m</A><BR></FONT></I><BR></P></B></B></DIV>
<DIV style=3D"FONT: 10pt arial">----- Original Message -----=20
<DIV style=3D"BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A=20
title=3Dbabaracus@bellsouth.net =
href=3D"mailto:babaracus@bellsouth.net">B.A.=20
Baracus</A> </DIV>
<DIV><B>To:</B> <A title=3Dti-hardware@lists.ticalc.org=20
href=3D"mailto:ti-hardware@lists.ticalc.org">ti-hardware@lists.ticalc.org=
</A>=20
</DIV>
<DIV><B>Sent:</B> Sunday, February 23, 2003 10:03 PM</DIV>
<DIV><B>Subject:</B> [TI-H] Re: TI-89 HW2 overclocking</DIV></DIV>
<DIV><BR></DIV>On Sun, 23 Feb 2003 21:53:11 -0500, Nick Peaden <<A=20
href=3D"mailto:Nitrocloud@earthlink.net">Nitrocloud@earthlink.net</A>>=
=20
<BR>wrote:<BR>> Anyway, there may be other factors in HW2 calcs that =
may make=20
it faster. <BR>> Are the RAM, ROM chips the same, and how about all =
other=20
chips, <BR>> capacitors, etc.?<BR><BR>I do know that the HW1 uses =
70ns SRAM=20
while the HW2 uses 85ns SRAM.<BR><BR>-- <BR>B.A. =
Baracus<BR></BODY></HTML>
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