3270pc, 5272, 5271 stuff wanted

From: Mike Allison <mallison_at_konnections.com>
Date: Mon Feb 9 23:16:27 1998

Right, the 3270pc cards were merely "communications" cards to connect
you to the mainframe ala the 3270 terminal...

-Mike



Philip.Belben_at_powertech.co.uk wrote:
>
> I haven't got time to reply in detail, but be warned.
>
> 1. The IBM cards that went in the 3270PC range were _not_ the same as
> those they sold as upgrades - the latter drove ordinary displays, etc.
>
> 2. There were many popular 3rd party 3270 (3278/3279) emulator cards
> available, the best known being IRMA.
>
> Philip
>
> BTW I was wrong about the 5272 - it is 720 x 350 x 8 resolution.
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> Tony.
>
> I just happened to have my cards out for cleaning.
>
> Yours seems a bit different. I wonder if it's earlier or an expansion
> card for the pc/xt to give it 3270 comm capability.
>
> My connection card has:
>
> The BNC
> 2x8435
> a BUNCH of gates or st, these 74L???
> no memory that I can see (the computer has 640k)
> a clock/crystal marked 14.1523 mhz (1589449)
> Some IBM chips
> 2x 5617135
>
> ????
>
> I dunno...
>
> Mike
>
> Tony Duell wrote:
> > I have what I believe to be an interface card from a 3270 PC here. It's a
> > full-length 8 bit card with PC/3278 on it. The main chips are :
> > N8X305N (microcontroller)
> > 3 off ROMs (15527-15529, Copyright 1983)
> > 4 off 6116 RAM
> > DP8340 and DP8341 (Some kind of interface chip...)
> > Assorted TTL glue
> > Passives, including a reed relay
> >
> > There's a single BNC connector on the bracket. There's also an expansion
> > edge connector at the top front, which seems to be linked to the ROM
> > pins/the microcontroller.
> >
> > -tony
Received on Mon Feb 09 1998 - 23:16:27 GMT