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- Newsgroups: comp.sys.hp48
- Path: sparky!uunet!decwrl!access.usask.ca!dvinci!getz
- From: getz@dvinci.USask.Ca (Robin Getz)
- Subject: Question for 48 surgeons
- Message-ID: <1992Jul22.185905.5242@access.usask.ca>
- Sender: news@access.usask.ca (USENET News System)
- Nntp-Posting-Host: dvinci.usask.ca
- Organization: University of Saskatchewan
- Date: Wed, 22 Jul 1992 18:59:05 GMT
- Lines: 45
-
- On the expansion ports, 40 pins - what are they? I was able to find the
- following at seq.uncwil.edu :
-
- ------------------------------------------------------------
- by Allan Petersen
- Dansk Data Elektronik A/S, Copenhagen
- ------------------------------------------------------------
-
- [ ...stuff deleted about electrical specs...]
-
- When you look down at the gold contacts and hold the battery end of
- card away from you, the leftmost pin is pin number one.
-
- The pin connections are:
-
- PIN: Signal: PIN: Signal:
- 1 Power supply input 21 Card enable (active HIGH)
- 2 Batt. out/ EPROM Vpp 22 Output enable (active low)
- 3 Addr. 0 23 Data 0
- 4 Addr. 1 24 Data 1
- 5 Addr. 2 25 Data 2
- 6 Addr. 3 26 Data 3
- 7 Addr. 4 27 Data 4
- 8 Addr. 5 28 Data 5
- 9 Addr. 6 29 Data 6
- 10 Addr. 7 30 Data 7
- 11 Addr. 8 31 nc How are these
- 12 Addr. 9 32 nc lines connected
- 13 Addr. 10 33 nc in the 48?
- 14 Addr. 11 34 nc Could really be
- 15 Addr. 12 35 nc nice to have
- 16 Addr. 13 36 nc waitrequest here!!
- 17 Addr. 14 37 Write prot. out (act low)
- 18 Addr. 15 38 Card present out(act high)
- 19 Addr. 16 39 Device type (low for RAM)
- 20 Write enable (active low) 40 Ground
-
- What I would like to know is what, if anything are lines 31-36 connected to
- on the HP. And if you have it a pointer to the Epson specs I would like that as
- well.
-
- Thanks in advance:
-
- -robin
-
-