The following scheme has been used to test Big Bang function with neither a real or virtual machine devoted to the task.

Setting up KEYSERVE

Let KSF be the requestor's key produced by the program KEYSERVE PLIG via PLIPACKER. It requires (via its preamble) the key RANGECF which is a requestor's key produced by the program RANGE PLIG via PLIPACKER. KEYSERVE also wants a node key to BANG_COM where it expects to find in respective slots 0 thru 3:
A device key to a 3270 style terminal.
See order 3 on the DEVALLOC key {(p2,devalloc)} and then order 1 on BDEVICE {(kor,bdevice)}. The latter order must be done after each IPL.

KEYBITS (from SYSTEMKEYS.)

A meter key to feed the prime meter for the nether world.

The journalizer node as in USER.JOURNALIZERNODE.

KEYSERVE also needs the domain tool. We leave this as an exersize to the reader.

Theory of Operation

INITIS runs very much as it would in a real bang by reading files via the CMS file system. Instead of placing pages in nodes in memory it sends their bits to the KEYSERVE object one by one. KEYSERVE builds corresponding real pages and nodes and fills the pages with code and such from CMS files and fills the nodes withreal keys matching what it sees in the bits it gets from INITIS. KEYSERVE puts processes in the nodes that needs them and finally starts all the nodes with processes.

Select a terminal to devote to this purpose (called the selected terminal).
Arrange with DEVALOC not to meddle with this terminal until further notice. This means that the terminal will be inaccessible to the normal receptionist.

Edit CMDFILE BANGCOM to indicate the address of the selected terminal.

Create the factory defined by RANGE PLIG in a new context called RANGE. Put the requestor key in USER.RANGECF .
This also wants FACILITY.ONCE which may be had by assembling ONCE ASSEMBLE.

Create a node USER.BANG_COM . Do: 'CMDFILE USER.CMS.BANGCOM'.

Create the factory defined by KEYSERVE PLIG in a new context called KS. This uses USER.RANGECF . Put the resulting requestor's key at USER.KSF .

Do KC USER.KSF 0 (,SB,M,SB) (,USER.KS,DOMPILE,METER.) in a new context called BANG. DOMPILE is a supernode of domain keys to the domains with primordial processes (There are about 7.). METER. is a NS record collection with a node key to each of the nodes for which a primordial meter keys was generated.

In the context switcher do: 'CRE CMSX'.

Therein do: 'CMDFILE USER.CMS.BAUXCMS', on branch b do: 'I CMS', 'FORMAT 191 A', 'ACCESS 194 T', then do your normal GDSKS stuff.

Do KC CMSDOMKEY 48 (,USER.KS) under CMSX.A . Then do LOAD INITIS GNOSIS and START under CMSX.B . Watch the BANG's bank run up. It stops at about 10000 nodes and a few thousand pages.
Install update GNX4 to INITIS.

Create a subdirectory BOOTS. in context CMSX. Install it as the CMSX export directory thus:]
KC IXPORTCONTROL 0 (,SB,M,BOOTS.)

In banrch CMSX.B edit file LCPTAPE EXEC *

Delete the tape command at the beginning and the three at the end. Do:]
'TOP']
'C /WRITETAPE /EXPORT / *' and then run the resulting exec.

Log into SYSADMIN on the chosen terminal, type 'JOIN' and then "SYSMAINT'.

To put the new PUB. into the old PUB.:

Log into SYSMAINT, create a context, and do:]
KC USER.SYSNODE 2 () (,PRIV)]
KC PRIV 16+14 (,USER.PUB.)

On the other terminal go to branch BANG.A and do:] KC DOMPILE 41 (%X00000007) (,D7)]
KC D7 16 () (,MORE)]
KC MORE 8 () (,SYSNODE)]
KC SYSNODE 2 () (,PRIV)]
KC PRIV 14 () (,USER.PUB.NETHER_PUB.)

Do 'COPYKEY BOOTS. USER.PUB.NETHER_PUB.BOOTS.' at branch CMSX.A.