[Simh] EXT :Re: TU58 device for PDP-11s

[Timothe Litt]

On 26-Jun-15 13:43, Hittner, David T (IS) wrote:
>
> What PDP-11 used TU58’s, and what controller did the drive connect to?
>
>  
>
> Dave
>
11/23, 11/44, VT103, HSC50 -- among others.

Host: Any RS232/423 (dumb) interface, e.g. DL(V)11, MXV11.  9600 - 38400
BPS using a packet protocol (RSP, IIRC) with XON/XOFF flow control

The drive itself has an embedded 8085 CPU that is the real controller. 
It's not terribly smart. 

The protocol is roughly similar to MSCP (lighter-weight); the tape is
block-addressable, normally the 512 byte DEC standard block, although
there's a 128 byte record mode for dealing with buffering/comm issues. 
Normally the controller assembles 4 records to make a block.  Cartridge
is formatted with 512 blocks of 512 bytes each (0.25 MB).

http://bitsavers.trailing-edge.com/pdf/dec/dectape/tu58/ has the docs.


This communication may not represent my employer's views,
if any, on the matters discussed. 


>  
>
> *From:*Simh [mailto:simh-bounces at trailing-edge.com] *On Behalf Of
> *Bill Cunningham
> *Sent:* Friday, June 26, 2015 1:14 PM
> *To:* Hans-Ulrich Hölscher; simh at trailing-edge.com
> *Subject:* EXT :Re: [Simh] TU58 device for PDP-11s
>
>  
>
>  
>
>     ----- Original Message -----
>
>     *From:*Hans-Ulrich Hölscher <mailto:hoelscher-kirchbrak at freenet.de>
>
>     *To:*simh at trailing-edge.com <mailto:simh at trailing-edge.com>
>
>     *Sent:*Friday, June 26, 2015 12:56 PM
>
>     *Subject:*[Simh] TU58 device for PDP-11s
>
>      
>
>     Am I right that there is currently no TU58 device available for
>     the PDP-11 series of computers?
>
>      
>
>     If so, would someone be so kind as to implement it?
>
>      
>
>     Thanks in advance to all programmers who ponder on evetually doing it!
>
>      
>
>     Regards,
>
>      
>
>     Ulli
>
>      
>
>
>     I don't know about simh, but there are several simulators out
>     there. There is something for linux too. But it sounds like a
>     worthy cause.
>
>      
>
>     Bill
>
>      
>
>

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