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From: neese@curly
Newsgroups: net.micro.trs-80
Subject: Re: Orphaned Response
Message-ID: <-776798@curly>
Date: Mon, 3-Mar-86 14:04:00 EST
Article-I.D.: curly.-776798
Posted: Mon Mar  3 14:04:00 1986
Date-Received: Sat, 8-Mar-86 23:08:00 EST
References: <9327@ucla-cs.ARPA>
Lines: 55
Nf-ID: #R:ucla-cs.ARPA:9327:curly:-776798:000:1920
Nf-From: curly!neese    Mar  3 13:04:00 1986



> Does anyone know what companies besides R/S makes a hard drive that can be
> plugged into the model 16A? I already have a r/s primary 12Meg, so I'm
> looking at secondaries.
 
You could use anybody's 5 1/4 secondary drive, but if you want the secondary
to auto-power-up with the primary, you'll have to do some modifications on the 
secondary drive bus.

> Also, is there an SCSI converter for it? 

Tandy sells a SCSI adapter board, for the Tandy 6000.  It can be used in the
16A, but you will have to have the CPU and FDC cards, in the 16A modified.  You
will alos need a special card cage bracket.  The RS service centers have the
information to do this.  In some cases, a new Z80 CPU board set is required.

> (Incidently, does anyone know how to get swap off of /dev/hd0? Can you
> just change /dev/swap, or do you have to patch the kernel. How about
> pipes?)

This information pertains to Xenix 1.3.x.  It can also be done with Xenix 3.x.
In either case, you will need the Software Development Software.  I have not
messed with moving pipes around, but I have moved the swapper externally.

disk    1
console 1
printer	1
***note that the minor number 0377 causes the kernel to autoconfigure
root    disk 0377
pipe    disk 0377
swap    disk 0377 0 8000
*
* if you want swap to be external, then make the change as follows:
* 	      device  start	size
* swap	disk	50	0	32000
*
* The device number is the octal representation of the device as listed in
* the /dev directory. For example:
*	1, 40 Feb 25 16:49 /dev/hd1:  decimal 40 = octal 50
*
* The starting block is 0 and the size is the number of blocks available. Must
* be less than 32766.
* After generating the kernel, mv it to /xenix, do a haltsys, and reboot.  
* Don't forget to do a 'mknod' for the new swap dev in /dev.  This makes the
* ps listing accurate.
*
***tunables
buffers 27
procs   60
mounts  8
inodes  100
files   100
clists  40
locks   50