8 Oct
2007
8 Oct
'07
9:40 a.m.
Hi its a long shot now the post was in 2001 , but I need a Hd46505 chip !!
best regards paul Haley
11 Oct
11 Oct
4:04 p.m.
the 6545 was a close relative of the 6845. IIRC the TI
PC used it. No clue where to find one though. The
Rockwell will probably work. They had their own
version of the Intel 8272/NEC '465 chip. My old ITT
Xtra XP used the Rockwell version. It went bust and I
replaced it with the 8272 from my Tandy 2000. It
worked fine.
--- Chuck Guzis <cclist at sydex.com> wrote:
On 8 Oct 2007 at 11:40, ph wrote:
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Hi its a long shot now the post was in 2001 ,
but
I need a Hd46505 chip
I don't have one, but will the Rockwell R6545 work?
It might be more
widely available.
Cheers,
Chuck
4:26 p.m.
On 11 Oct 2007 at 16:04, Chris M wrote:
the 6545 was a close relative of the 6845. IIRC the
TI
PC used it. No clue where to find one though. The
Rockwell will probably work. They had their own
version of the Intel 8272/NEC '465 chip. My old ITT
Xtra XP used the Rockwell version. It went bust and I
replaced it with the 8272 from my Tandy 2000. It
worked fine.
The big difference that's important here is that the Hitachi and
Rockwell chips have a "transparent" refresh mode that allows a nice
seamless memory share with a 6502. Set by Register 8, bit 3. The
6845 doesn't have this--so it probably won't work.
Cheers,
Chuck
4:07 p.m.
--- Chuck Guzis <cclist at sydex.com> wrote:
On 8 Oct 2007 at 11:40, ph wrote:
Wasn't this very chip used in the Victor 9000/Sirius
1? If so I think you can replace it with a 6845. Worth
a try...
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Hi its a long shot now the post was in 2001 ,
but
I need a Hd46505 chip
6283
days inactive
6286
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6 comments
5 participants
participants (5)
-
alexandre-listas＠e-secure.com.br -
cclist＠sydex.com -
chrism3667＠yahoo.com -
holger.veit＠iais.fraunhofer.de -
paul.haley1＠ntlworld.com