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- Using IBM AS/400 with QEMM-386
- Quarterdeck Technical Note
- by Dan Sallitt
-
- The IBM AS/400 is a complicated terminal emulation setup, akin to
- the 5250. It usually requires 3 files in config.sys (EIMPCS.SYS
- (1K), ECYDDX.SYS (block device - 21K) and FSDD.SYS (needs ECYDDX
- before it - 59K)) and 2 from the command line (a hardware manager
- - either E5250AH.COM (8.2K) or WSEAH.COM, usually - and
- STARTRTR.COM, which is 56K) to get it going, followed by a number
- of other files to implement various functions.
-
- One of the cards that AS/400 software can use, the 5250 card (and
- maybe others as well), puts a piece of RAM, 8K or so in size, at
- xC00 (usually CC00). QEMM 5.00 may not see this RAM, and may
- require that you explicitly exclude it with a parameter on the
- QEMM line in your CONFIG.SYS file. In addition to excluding this
- area, make sure the RAM parameter is on QEMM; otherwise,
- E5250AH.COM accesses vast portions of the reserved memory area
- when it loads, and all of these areas may need to be excluded to
- prevent crashes when some program accesses them.
-
- Giving E5250AH.COM the parameter /Mx (where x is the same as
- above - C by default) makes it access fewer areas, though the
- areas that are accessed still need excluding if you don't use the
- RAM parameter.
-
- Usually, after the STARTRTR is run, users run a program FSPC.COM
- to make a virtual disk on the mainframe. This program isn't
- resident and takes no memory.
-
- STARTRTR will need 160K of space to load high, even though it
- settles down to 56K or so.
-
- We're hearing in March 1990 of new versions of the IBM AS/400
- software that have fewer and smaller files. Apparently the
- driver FSSD.SYS and the non-resident FSPC.COM are united in a
- smaller TSR STARTFLR.COM.
-
- Copyright (C) 1990 by Quarterdeck Office Systems
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