Hello,
I'd like to set up SIMH to simulate a GT40 as closely as possible. To
be precise, the GT40 that was a the MIT AI Lab.
So far, I have this:
set cpu 11/05
set cpu 16k
set dli enabled
set dli lines=2
set vt enabled
set vt crt=vr14
First, according to the bootstrap ROM, there is a DL11 at
As is often the case, terminology seems to have begotten confusion.
CD-ROM media have a (usable) sector size of 2048 bytes + ECC/overhead.
SCSI allows exposing this as variable logical block sizes. Device
drivers may present the SCSI LB size to their clients - or they may
reblock the data into
> In the vector world, the replacement was the (really expensive) VS-60,
> made by Sanders. That competed with Vector General, E, and Megatek
There was an E LDS-1 display hooked up to one of the ITS machines.
Unfortunately, almost no software for it has been preserved.
There's a device driver
On 9/3/18 8:35 AM, Al Kossow wrote:
>
>
> On 9/3/18 8:17 AM, Mark Pizzolato wrote:
>
>> Was this code really present in ROM in that system?
>
> yes, it is located on one of the hex cards in the VT-11 part of
> the custom 11/05 backplane in the GT-40
Getting off topic but I have to chime in: The Tek 4010 vector storage scope
family was very popular in the sciences and engineering through the end of the
1980s. Way more common than the GT40 ever was. Tek4010 emulation lives on today!
Of course a storage scope is a very different beast if you
On 9/3/18 8:52 AM, Mark Pizzolato wrote:
> Meanwhile, if the GT40 could be some sort of terminal to some other
> system, how was it connected to that other system? Serial line via the
> DL device?
>
correct.
there was a package called 'Picture Book' on the 10 that you could use
to download
On 9/3/18 10:29 AM, Timothe Litt wrote:
> For most purposes, the GT40 was superseded by devices like the VT105 (VT100 +
> b/w graphics), VT125, GiGi, & VT240. But
> those are all raster scan devices - which can't match the quality of a vector
> display. And none of them had a lightpen.
In
Mark Pizzolato wrote:
> You are supposed to be able to set the base address. There was a bug
> in the DLI device's MTAB array that wasn't set correctly. This is now
> fixed.
Thanks!
> Meanwhile this certainly could easily solved by setting the RAM in
> the system to 64K and merely loading the
On 9/3/18 8:17 AM, Mark Pizzolato wrote:
> Was this code really present in ROM in that system?
yes, it is located on one of the hex cards in the VT-11 part of
the custom 11/05 backplane in the GT-40
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also, Andy McFadden has maintained a CDROM FAQ
https://cdrfaq.org/
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On Monday, September 3, 2018 at 12:22 AM, Lars Brinkhoff wrote:
> I'd like to set up SIMH to simulate a GT40 as closely as possible. To be
> precise,
> the GT40 that was a the MIT AI Lab.
>
> So far, I have this:
>
> set cpu 11/05
> set cpu 16k
> set dli enabled
> set dli lines=2
> set vt
> On Sep 3, 2018, at 11:52 AM, Mark Pizzolato wrote:
>
> On Monday, September 3, 2018 at 8:37 AM, Al Kossow wrote:
>> On 9/3/18 8:35 AM, Al Kossow wrote:
>>>
>>>
>>> On 9/3/18 8:17 AM, Mark Pizzolato wrote:
>>>
Was this code really present in ROM in that system?
>>>
>>> yes, it is
On Monday, September 3, 2018 at 8:37 AM, Al Kossow wrote:
> On 9/3/18 8:35 AM, Al Kossow wrote:
> >
> >
> > On 9/3/18 8:17 AM, Mark Pizzolato wrote:
> >
> >> Was this code really present in ROM in that system?
> >
> > yes, it is located on one of the hex cards in the VT-11 part of the
> > custom
On 03-Sep-18 11:52, Mark Pizzolato wrote:
>
> Interesting...
>
> I'm a little confused though. I certainly understand using the GT40
> as a standalone system to run Lunar Lander. That's great fun.
>
> Meanwhile, if the GT40 could be some sort of terminal to some other
> system, how was it
On Monday, September 3, 2018 at 10:46 AM, Lars Brinkhoff wrote:
> Mark Pizzolato wrote:
> > Meanwhile this certainly could easily solved by setting the RAM in the
> > system to 64K and merely loading the ROM data into the appropriate
> > address range.
>
> Sure, that's an OK workaround.
Is the
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