On 14 Apr 99 at 17:51, Philip.Belben_at_pgen.com wrote:
>
>
> >> I just picked up an IBM 3270 Personal Computer Programmed Symbols Adapter
> >> card in the box. The box says that it's "an option that provides the
> >> storage and controls for displaying an APL font and six additional
> >> programmable fonts." It's a full length 8 bit card with two sockets on the
> >> to edge. There is also two jumpers in the box that I assume are used to
> >> jumper this card to another card. I didn't get any instructions or
> >> software with it. Does anyone know how to use it or have instructions etc
> >> for it?
> >>
> >> Joe
> >>
> > That sounds like a card which could enable my otherwise useless IBM
> > monitor meant for the 3270XT. There was a previous discussion on this
> > machine a while back. I think there were something like 5 cards in the
> > total array which didn't leave much for peripherals in the XT. On the
> > other hand I might be thinking of the Epson QX-10 Valdocs :^))
>
> Like Sam, I think of three cards in this connection, but I also recall that not
> all machines had all cards. The 3270 card may not have been the same card as
> the display adaptor...
>
> On the display side, there was a display card, which may or may not have been
> part of the terminal card. Without it, you can't drive the 5272 monitor, I'm
> afraid. In addition, you could get the All Points Addressable (APA) card, which
> emulated the CGA graphics modes (but note that the 5272 only displays 8
> colours), and the PS card, which you have, which emulated the graphics and
> programmable character set modes of the 3279 terminal.
>
> I'm afraid the card on its own won't be of much use...
>
> Philip.
>
Muellers 3rd edition mentions 3 to 6 custom cards. You also required the
3270PC keyboard and the 5272 monitor which allegedly was comparable to an
EGA. Other than that it was a stock XT M-B
He outlines the boards which are
1. 3270 System Adapter- to connect to a remote 3274 controller
2. Display Adapter- extended-character in 8 colors
3. Extended Graphics Adapter for local graphics in Hi (2colorsat 720x350 or
640x200) and med. (4 colors at 360x350 or 320x200) IBM called this an XGA
not the same as the PS2 Extended Graphics ARRAY.
4. Programmed Symbols Adapter to provide graphics capabilities available on
3278/3279 display stations. Needed the XGA in an adjacent slot. Joes' card.
5. Keyboard Adapter - went in the 8th slot and connected the special K-B.
On delivery the XT slots in the 3270PC were filled with the Sys adapter, the
display adapter,K-B adapter, FDD adapter, and HDD controller. With the graphic
adapter and memory multifunction card not much room left.
Interestingly the 3270PC Control Program allowed up to 7 windows at one time.
Shades of things to come. Apparently there was also an AT version.
The XT 370 however used 3 cards.
All according to Mueller as I've never seen either of these.
ciao larry
lwalker_at_interlog.com
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Received on Wed Apr 14 1999 - 12:55:09 BST