15 May
2002
15 May
'02
6:45 p.m.
One of the 4's was for the bus size. It was a multiplexed
synchronous bus. It had 8 phases. 3 were for address and
one was for the rom. One or two were alu and I don't recall
what the other was for but I think it was bank selects.
Each device would watch the instruction and would do the
right thing ( I/O or RAM ) when it's time came around.
One might call it smart I/O. This way, the processor didn't
have to have the additional pins to select the function
for the bus.
Dwight
From: "Sellam Ismail"
<foo(a)siconic.com>
On Thu, 16 May 2002, Tony Duell wrote:
I find that hard to believe. The 4004 was part of
a chipset containing
the 4001 (ROM), 4002 (RAM) and 4003 (I forget exactly what, some kind of
I/O?). The 4001 and 4002 parts were used in lots of 4004 or 4040-based
designs.
And according to Ted Hoff, it was quite by accident that it ended up with
part number 4004. Coincidence and all.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
_______________________________________________
cctalk mailing list
cctalk(a)classiccmp.org
http://www.classiccmp.org/mailman/listinfo/cctalk
15 May
15 May
8:10 p.m.
New subject: [CCTALK] Re:transistor counts again
"Dwight K. Elvey" wrote:
One of the 4's was for the bus size. It was a multiplexed
synchronous bus. It had 8 phases. 3 were for address and
one was for the rom. One or two were alu and I don't recall
what the other was for but I think it was bank selects.
Each device would watch the instruction and would do the
right thing ( I/O or RAM ) when it's time came around.
One might call it smart I/O. This way, the processor didn't
have to have the additional pins to select the function
for the bus.
Dwight
I read many moons ago that Intel at that time could not package
a chip with more than 16 pins, until the 8080. That was a
nice chip for the time. Notice too how the leading edge of
CPU's have been around $350 US each starting with the early
Intel chips and continuing to today.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
16 May
16 May
1:35 p.m.
New subject: [CCTALK] Re:transistor counts again
A non-text attachment was scrubbed...
Name: not available
Type: text
Size: 325 bytes
Desc: not available
Url :
http://www.classiccmp.org/pipermail/cctalk/attachments/20020516/cf5fa39d/at…
2:27 p.m.
New subject: [CCTALK] Re:transistor counts again
On Thu, 16 May 2002, Tony Duell wrote:
The 8008 does have 18 pins. I have a tube of 6 of them in front of me
right now.
-Toth
I read many
moons ago that Intel at that time could not package
a chip with more than 16 pins, until the 8080. That was a
I thought the 8008 had 18 pins, and that predated the 8080.
For that matter, the 4040 had 24 pins, as did the 1702 EPROM. I am not
sure whether those came out before the 8080, though. 
3:05 p.m.
New subject: [CCTALK] SCSI FDD
Anybody know ehere to get SCSI floppy drives?
I understand that they work well with later DEC
like the vS3100's. (1.44 3.5" naturally).
John A.
_______________________________________________
insert footer into mouth here
4:07 p.m.
New subject: [CCTALK] SCSI FDD
Anybody know ehere to get SCSI floppy drives?
I understand that they work well with later DEC
like the vS3100's. (1.44 3.5" naturally).
There was at least one SCSI floppy made for NeXT machines
since the original cube didn't support an internal floppy. It would
likely be 2.88 though.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757
17 May
17 May
1:45 p.m.
New subject: [CCTALK] SCSI FDD
--- Jeff Hellige <jhellige(a)earthlink.net> wrote:
It is. I also happen to have a SCSI floppy drive that I think came
out of some AT&T box (3B2, perhaps?) It's a 34-pin floppy mech with
a daughter card that speaks SCSI. It is also 2.88MB (well... a 4MB
-media disk that happens to format under DOS to approximately 2.9MB,
he says, remembering a flame war in the past about floppy capacity
designators).
-ethan
__________________________________________________
Do You Yahoo!?
LAUNCH - Your Yahoo! Music Experience
http://launch.yahoo.com
Anybody know
ehere to get SCSI floppy drives?
I understand that they work well with later DEC
like the vS3100's. (1.44 3.5" naturally).
There was at least one SCSI floppy made for NeXT machines
since the original cube didn't support an internal floppy. It would
likely be 2.88 though.
16 May
16 May
3:31 p.m.
New subject: [CCTALK] Re:transistor counts again
Tothwolf wrote:
On Thu, 16 May 2002, Tony Duell wrote:
The 8008 does have 18 pins. I have a tube of 6 of them in front of me
right now.
I forgot about the 1702 EPROM. But the point is only with the 8080
did they go to the larger 40 pin packaging. Nodays a 40 pin package
is considered tiny.
I read
many moons ago that Intel at that time could not package
a chip with more than 16 pins, until the 8080. That was a
I thought the 8008 had 18 pins, and that predated the 8080.
For that matter, the 4040 had 24 pins, as did the 1702 EPROM. I am not
sure whether those came out before the 8080, though.
1:33 p.m.
A non-text attachment was scrubbed...
Name: not available
Type: text
Size: 1515 bytes
Desc: not available
Url :
http://www.classiccmp.org/pipermail/cctalk/attachments/20020516/25aae814/at…
8103
days inactive
8105
days old
8 comments
7 participants
participants (7)
-
allain＠panix.com -
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
dwightk.elvey＠amd.com -
erd_6502＠yahoo.com -
jhellige＠earthlink.net -
tothwolf＠concentric.net