IBM s/390 manual Appendix B. FLEX-ES parameters, System definitions

B

Appendix B. FLEX-ES parameters

This appendix reviews a selected subset of the FLEX-ES parameters needed to define emulated S/390 systems and their resources. The formal FLEX-ES documentation should be reviewed for additional information, more emulated devices, and many other parameters.

System definitions

System definitions are usually something like this:

system S10A:
memsize(262144)	# K Central Storage = 256 MB
essize(64)	# M Expanded Storage = 64 MB
instset(esa)
tracesize(256)
cpu(0) dedicated	# Single Pentium, dedicated
channel(0) local
channel(1) local
channel(2) local
channel(3) local

cu devad(0x00C,3) path(0) resource(R10A2821)	# 2450R, 2540P, 1403
cu devad(0x560,1) path (0) resource(R10A3480)	# tape drive (4mm)
cu devad(0x700,16) path(1) resource(R10A3174)	# 3270	terminals
cu devad(0xA80,12) path(2) resource(R10A3990)	# 3390	disks
cu devad(0xE20,2) path(3) resource(R10A3088)	# CTCs for TCP/IP
end S10A

The first line (system S10A) provides a name for the system being defined. The FLEX-ES compiler will create a file named, for this example, S10A.syscf.

memsize always expresses kilobytes of storage. The largest accepted value is 2097152, which would define a 2 GB system. The size specified will be the size of central storage in the emulated S/390. There is no direct relation to the memory size on the ThinkPad server, although we strongly recommend that memsize be such that no paging is required by the underlying Linux system.

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