[Simh] VAX Tape Emulation?

[Tim Shoppa]

A couple of the tape image utilities I wrote or updated in the 1990s have that limit. Let me see if they are still in the SIMH utility tree. They never would’ve bitten me back in the 90s because the biggest reels I ever dealt with were 3600 feet at 6250 BPI, less than 250 Mbytes.

Tim

> On Jan 25, 2018, at 8:23 AM, Johnny Billquist <bqt at softjar.se> wrote:
> 
> Hmm. None of the tools I wrote ever had that limit. They just process records and don't give a damn about absolute disk or tape position.
> 
> Johnny 
> 
> 
> Tim Shoppa <tshoppa at gmail.com> skrev: (25 januari 2018 00:53:34 CET)
>> 
>> Many common tape image tools as of two decades use 32-bit integers to carry offsets around and will be limited to 4Gigabyte tape image sizes.
>> 
>> I don't think this is a fundamental limit to the tape image formats used by SIMH, just a common limitation of the tape image tools you might find from 20 years ago.
>> 
>> Tim.
>> 
>>> On Wed, Jan 24, 2018 at 5:02 PM, Zane Healy <healyzh at avanthar.com> wrote:
>>> What type/size of tapes does the VAX emulation support?  I was looking through the doc’s and it wasn’t obvious to me.  Is there a size limit?
>>> 
>>> Thanks,
>>> Zane
>>> 
>>> 
>>> 
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>> 
> 
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