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- Newsgroups: comp.sys.cbm
- Path: sparky!uunet!microsoft!hexnut!kentsu
- From: kentsu@microsoft.com (Kent Sullivan)
- Subject: Re: Swiftlink Programming
- Message-ID: <1992Aug17.161533.28787@microsoft.com>
- Date: 17 Aug 92 16:15:33 GMT
- Organization: Microsoft Corp.
- Summary: Call CMD
- References: <jwaleke.04ri@tcedge.mi.org>
- Lines: 32
-
- In article <jwaleke.04ri@tcedge.mi.org>, jwaleke@tcedge.mi.org (Jim Waleke) writes:
- >
- >
- > Does anyone have any info on how to program the Swiftlink-232 Cartridge? Or
- > could point me to where I can find such information? (Books, Magazines,
- > FTP, or FREQ?)
-
- If you bought your cartridge from CMD, they will provide you with a pretty
- complete set of programming notes. When we sold them the rights to the cart
- we also gave them the developer's kit we had been distributing.
-
- > I am currently working on a BBS and I want to write it to work with Swiftlink
- > and a 14.4k v.32bis Modem. It will run on the 128.
-
- You should tell CMD this when you call. Their number is 413-525-0023.
-
- > How different is it from normal User Port communications? About all I know
- > is that is is mapped around $D700.
-
- The SL-232 is somewhat similar to the user port in its register configuration
- but programming it is more complicated because (a) you have to write handlers
- yourself because the standard routines can't keep up and (b) there are more
- features to the SL-232 than the user port. The chip in the SL-232 (6551 ACIA)
- is the model that the user port routines were made with in mind.
-
- It in fact is NOT mapped at $D700 unless you have a special situation. The
- default mapping is $DE00. A jumper cut can give you $DF00. If both of those
- locations are full (perhaps fairly common with a BBS operator), you can rig
- $D700 but an internal jumper wire is required. $D700 is only possible on the
- C-128. The developer's notes talk about how to do this.
- --
- Kent Sullivan - Microsoft Corporation Redmond, WA - kentsu@microsoft.com
-
- The opinions expressed in this article are my own and do not necessarily
- reflect those of my employer.
-