[Simh] DEC VT emulators on MAME

[Johnny Billquist]

On 2017-04-11 08:32, Johnny Billquist wrote:
> On 2017-04-11 01:31, Richard wrote:
>> In article <c54a5796-bf95-06e4-9890-6d17259c069c at softjar.se>,
>>     Johnny Billquist <bqt at softjar.se> writes:
>>
>>> No. The VT330 and VT340 have an external cartridhe that plugs into a
>>> slot in the back, and which holds most of the code.
>>
>> You're describing this like there's a port on the external case of the
>> terminal for this, but I am not seeing that in the diagrams.  It shows
>> on the engineering drawings as a connector on the rear side of the
>> CPU module.
>
> Correct. There is a port on the external case.
>
>> <http://bitsavers.trailing-edge.com/pdf/dec/terminal/MP02411_VT330_EngrDrws_Feb87.pdf>
>>
>>
>> Am I missing something?
>
> Yes. I don't know how you read schematics, but if you start with that
> document, you have the ROM cartridge mentioned already on the first page.
>
> Going to the CPU module, you have a huge connector called J3, which is
> where the cartridge plugs in.
>
> And then of course, you have the ROM cartridge drawing itself, starting
> at page 25.
>
> It's so clear in those schematics that I have no idea how you cannot see
> it.
>
> If all you are searching for is a picture where you see the external
> slot, those drawings don't dhow it. The only picture of the rear shows
> half the rear with the cover, and half without. The cartridge slot is
> behind the part drawn with the cover.

Actually, if you go to page 46, you have a full picture of the rear. 
Looking from left to right, you have a rectangle where the DB25 is, a 
narrow, high rectangle which is the cartridge slot, then a place for a 
label or whatever, and at the right end is the power receptacle.
Below this from left to right is a round hole where the mouse connector 
is, followed by some squares where you have the MMJ and keyboard connectors.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol