Devices pcram(7D)
NAME
pcram - PCMCIA RAM memory card device driver
SYNOPSIS
memory@/pcram@,0:c
memory@/pcram@,0:c,raw
DESCRIPTION
The PCMCIA RAM memory card device driver supports disk-like
I/O access to any standard PCMCIA static random access
memory (SRAM) card and dynamic random access memory (DRAM)
card. The driver supports standard PCMCIA SRAM/DRAM cards
that contain a Card Information Structure (CIS). RAM card
densities in the 512Kilobytes to 64Mbyte range are sup-
ported.
PRECONFIGURATION
If a PC card memory device is recognized, the pcram device
driver is automatically loaded, the physical address allo-
cated, and special files created (if they do not already
exist).
Known Problems and Limitations
The Solaris pcmem driver is not capable of handling "combo"
memory cards with multiple types of memory on them (for
example, combined SRAM and nonvolatile FLASH). Inserting
such a card into a system running the Solaris software may
cause a system panic.
Because the PC card memory device is designed as a pseudo-
floppy diskette type, the only utility that can be used for
formatting is fdformat(1).
CONFIGURATION
Configuration topics include initial installation and confi-
guration, identifying an unrecognized device, special files,
using PC card memory devices, and hot-plugging.
Initial Installation and Configuration
1. Install the Solaris software.
2. Boot the system.
3. Insert the card.
Identifying an Unrecognized Device
If you insert a memory device and it is not recognized (no
special files created), use the prtconf command.
SunOS 5.11 Last change: 2 Mar 2007 1
Devices pcram(7D)
1. Become root.
2. Run the prtconf -D command to display the confi-
guration recognized by the system. A recognized
device will appear in the prtconf output. For exam-
ple:
# prtconf -D
. . .
pcic, instance #0 (driver name: pcic)
. . .
memory, instance #0 (driver name: pcmem)
pcram, instance #0 (driver name: pcram)
3. If your memory device does not appear at the end of
the prtconf output, it is not supported and cannot
be used with the pcram driver.
Special Files
The special files created for PC card memory devices act
like disks and have names in the form /dev/dsk/c#t#d#p# or
/dev/dsk/c#t#d#s#. Abbreviations used in the names are:
o c# Controller #
o t# Card technology type #, defined as follows:
0 Null--no device
1 ROM
2 OTPROM (One Time PROM)
3 UV EPROM
4 EPROM
5 Flash EPROM
6 SRAM
7 DRAM
o d# Device region of type #, usually zero
o p# fdisk partition #
o s# Solaris slice #
Note -
A device name can be specified either by a partition name
(p#) or a slice name (s#), but not both.
Using PC Card Memory Devices
Solaris recognizes a PC Card memory device automatically
upon the card's insertion. If you do not want automatic
handling of a PC card memory device, insert an entry for
the device in /etc/vfstab and set the mount at boot field to
SunOS 5.11 Last change: 2 Mar 2007 2
Devices pcram(7D)
no. See vfstab(4).
PC Card memory devices do not need to have file systems on
them, though typically, before using a new PC Card memory
card, you will want to create a file system on it. DOS PCFS
is the best format to use. (You can use virtually any file
system format on a PC card memory card, but most other file
system formats are platform-dependent, making them unsuit-
able for moving data between different types of machines.
See "Using a PCMCIA Memory Card" in the OpenWindows Advanced
User's Guide.)
Note -
If you want to redirect the output of a tar command (or dd
or cpio) to a PC card memory device, first create a file
system on the card, using the fdformat(1) command without
arguments. The card must be reformatted before it can be
written on again.
Hot-Plugging
If a memory card is removed while in use, the device driver
returns errors until the memory card is inserted into the
appropriate socket. Close and reopen the device with the
card reinserted, and the memory card will work.
o If you remove the card while in use as a file sys-
tem, unmount the file system using the umount com-
mand. Then reinsert the card and remount the file
system using the mount command.
o If you remove the card and interrupt a tar or cpio
process, stop the process, reinsert the card, and
restart the process.
FILES
/kernel/drv/pcram pcram driver
/dev/dsk/cntndnsn block files
/dev/rdsk/cntndnsn raw fileswhere:
cn controller n
tn technology type n
0x1ROM,0x2OTPROM,0x3EPROM,
SunOS 5.11 Last change: 2 Mar 2007 3
Devices pcram(7D)
0x4EPROM,0x5FLASH,0x6SRAM,
0x7DRAM
dn technology region in type n
sn slice n
SEE ALSO
fdformat(1), pcmcia(7D), dkio(7I), pcmem(7D)
SunOS 5.11 Last change: 2 Mar 2007 4
|
