Hi,
Does anyone happen to have a manual for the Y-E Data YD-380B 5.25" floppy
drive that explains how to set it to either run at 300RPM or enable the
speed control via pin 2? I'd like to set this thing up on a BBC Micro if at
all possible.
Also, if it can do double-stepping ("40 track read"), details on that would
be very handy.
Thanks.
--
Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT
philpem at philpem.me.uk | Athlon64 3200+ A8VDeluxe R2 512MB+100GB
http://www.philpem.me.uk/ | Panasonic CF-25 Mk.2 Toughbook
... Misspelled? Impossible. Error correcting modem!
>From: "Allison" <ajp166 at bellatlantic.net>
>
>>
>>Subject: Bit of CP/M trivia needed
>> From: "Brian Knittel" <brian at quarterbyte.com>
>> Date: Sat, 27 Aug 2005 00:58:01 -0700
>> To: cctalk at classiccmp.org
>>
>>Hi all,
>>
>>Does anybody out there know for certain when the
>>term BIOS was coined? I believe it was Gary Kildall,
>>and from what I can find, it was around 1978 that
>>he abstracted the I/O and localized it in what
>>he called the BIOS. Anyone know differently?
>
>The term BIOS is older, early '77. It came into use with
>V1.3 I think and for cetertain in V1.4.
>
>>Also -- was the BIOS stored on the CP/M
>>floppy, or was it in ROM/EPROM? If not, how
>>did CP/M machines boot? Was there a dedicated
>>boot ROM that was used just for startup, and
>>then the BIOS took over? I had one back in
>>the day, but I sure can't remember this detail.
>
>The easy answer is yes. Tranditional CP/M systems the
>CCP/BDOS and BIOS were on the first two reserved tracks
>of the floppy (8" SSSD) and those were loaded by a boot
>rom.
Hi
My understanding was that the first ones had no ROM
and used a DMA controller that loaded bootstrapping
code from the first sector on reset. I have such a
controller on my machine. All RAM, no ROMs.
Dwight
>
>Other implmentations from V2 on it was easily to store
>the BIOS in ROM and use that to boot the system.
>
>>This is for a writing project, so I'd like
>>to get it right,
>>
>>Thanks!
>>Brian
>
>Thre is much myth, and misinformation of old cpm. Much of
>it was from people that had never used or never been there
>(in time) and their sense of reference is the PC rather
>than what came before.
>
>Allison
>
>
UPS delivered my Gavilan today, one day earlier than paid for.
I want to open it, clean it, etc., before attempting to power it on. Anyone
here worked one before?
-----------------------------------------
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I've got loads of 8 inch disks. Tell me how many you'd like and where to ship
them. How about 10cents each? Fedex ground is the cheapest way to send if you
want many.
I had previously asked about a disk platter I was trying to identify. I have
a couple of more pictures of it as well as some items from another drive.
The latter is stamped "INFOMAG". By doing some www research I thought I had
identified one or more of the principals in the company but got no reply to
my emails. This is apparently a shortened version of Information Magnetics
Corp. According to "Corporate Affiliations", that name was later changed to
Computer & Communication Technology Corp. That name was later changed to
Sunward Technologies, Inc. That company was later merged with Read-Rite
Corporation. No other part numbers or IDs. If you recognize it I would
appreciate the identification.
Here's our web page with the pictures of the unknown items:
http://www.cse.uta.edu/TheMuseum at CSE/Whazat.html
TIA,
Gil
>From: "Allison" <ajp166 at bellatlantic.net>
>
---snip---
>
>The DSD880 and RX01/02 drives are of a similar design with a local
>CPU (crude TTL logic state hardware or 2901s) to do all the heavy
>lifiting at that floppy interface end with a trivial interface
>to the processor bus. Neither include boot logic.
>
>As to DMA on FDCs well SMC did one that had it but it was a PITA
>to use as every bus is differnt and timing plus control signals
>required a lot of work to integrate. Most FDCs were trying to be
>generic and to keep die size down (hence cost) things were not
>done that would make the chip system specific.
---snip---
Hi Allison
It is interesting that they didn't include this.
On my machine it isn't even more hardware. There
is just one instruction in the state machine to
load a sector count of 1. It then just does a normal
read. Every thing else is just default reset values
>from the reset line. I remember thinking how trivial
it was. I can understand that if the controller needed
to know things like density, this might require more
but it is a simple operation that could be easily
added to any that have a state machine to run
the controller operations. I can see why the FDC
chips don't do this. There is a lot to setup but
still, a default reset state could have easily
provided the needed inital values.
As I recall, the board has a jumper to not do the
auto boot. I think the auto boot is a cool thing.
Also, yes it is rare.
Dwight
Does anyone have the pinout for the Motorola MC6881 or MC3449 chip? (16
pin DIL package) (Those 2 devices are equivalents, the ones I have are
marked with both numbers.). From what I can tell, it's a triple
bidirectional bus switch.
They are used in the HP37201 HPIB extender, HP seem to have created
separate data buses for the memroy and I/O chips. I guess this device is
on-topic here, mine dates from 1979, a pair of them allow an HPIB bus to
be fed over various types of serial link, including asynchronous and
synchronous modems.
-tony
I guess for the Ultra 1. I couldn't do that with my Ultra 2. It just wound
not fit in there and believe me I tried.
Ram
> -----Original Message-----
> From: listmailgoeshere at gmail.com [mailto:listmailgoeshere at gmail.com]
> Sent: Monday, August 29, 2005 2:40 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Help! Sun Ultra 1 HD replacement?
>
>
> On 8/29/05, Ram Meenakshisundaram <RMeenaks at olf.com> wrote:
> > Just grab any 80-pin ultra scsi drive. Just be careful about heat
> > dissipation though. I just bought two 73Gb scsi drives for
> my Ultra 2
> > on ebay for $150. Make sure whatever drive you buy that it is a 1"
> > height drive otherwise it will NOT fit in the drive cage.
>
> Incorrect. The U1 drive cage will in fact hold a 1.6" drive
> in the lower slot.
>
> I wouldn't want to run a 1.6" and a 1" together in there for
> heat dissipation reasons (they will fit, I've tried, but they
> end up *very* close together), however if the machine only
> has one disk in it, a 1.6" in the bottom slot will be fine.
>
> Ed.
>
I heard somewhere that even if you are only using one drive, you should
STILL add a dummy drive in the second slot so that airflow is better. I
currently have two 9.1GB drives on my Ultra 2 and Solaris 10 is a pig. I am
planning on using one of my new drives for Solaris and still leave one of
the 9.1GB drives as /export/home. The other drive is going into my PC as a
dual Linux/Solaris installation along side my IDE-based Windows
installation...
Ram
> -----Original Message-----
> From: Doc Shipley [mailto:doc at mdrconsult.com]
> Sent: Monday, August 29, 2005 2:47 PM
> To: General at mdrconsult.com; On-Topic and Off-Topic Posts
> Subject: Re: Help! Sun Ultra 1 HD replacement?
>
>
> listmailgoeshere at gmail.com wrote:
>
> > On 8/29/05, Ram Meenakshisundaram <RMeenaks at olf.com> wrote:
> >
> >>Just grab any 80-pin ultra scsi drive. Just be careful about heat
> >>dissipation though. I just bought two 73Gb scsi drives for
> my Ultra 2
> >>on ebay for $150. Make sure whatever drive you buy that it is a 1"
> >>height drive otherwise it will NOT fit in the drive cage.
> >
> >
> > Incorrect. The U1 drive cage will in fact hold a 1.6" drive in the
> > lower slot.
>
> Not necessarily. *Some* Ultra1 systems will accept a 1.6"
> disk, but
> some won't. That's a physical limitation of the backplane,
> rail guides
> and SCA connector, not a question of "supported configuration".
>
> > I wouldn't want to run a 1.6" and a 1" together in there for heat
> > dissipation reasons (they will fit, I've tried, but they
> end up *very*
> > close together), however if the machine only has one disk in it, a
> > 1.6" in the bottom slot will be fine.
>
> Heat is likely to be an issue with 2 high-RPM disks, even
> with a pair
> of 1" drives. Air flow is side-to-side, so making sure there's ample
> space on both sides of the system helps quite a lot.
>
>
> Doc
>
