NCR System 3300 - Model 3350

3350R208.EXE 3350 Refdisk ver 1.11.00 Y2K Compliant
3350SD01.EXE 3350 Service Diags Disk 1 of 1 ver 2
3350UD01.EXE 3350 User Diags Disk 1 of 1 ver 2.04

HIGH_RES.EXE 77c22(e) DOS Device Driver (ver 2.10)
WIN_31.EXE 77c22(e) Windows 3.1 Video Drivers
CLR1SS01.EXE Clarity I SSD (Win & NT) v 1.30
CAMC9X.EXE CAM disk drivers for 53C9X SCSI host
CDSCSI-2.SYS DOS CDROM Driver for SCSI 2 Devices
Other NCR files and CD-ROM drivers are HERE.

System Board P515-0001724C?

CR5 +12v LED
CR6 -12v LED
CR7 +5v LED
F1 KB fuse 1.5A
F2 5 V floppy fuse, 3 A
F3 12 V floppy fuse, 3 A
F4 SCSI termpwr fuse, 1 A
FS1 CMOS clear
J1 Keyboard port
J2 Power connector
J3 Mouse port
J4 Floppy connector
J5,6,8,9,11,12 72-pin SIMM socket
J7 DB25 serial (top) parallel
J10 Internal SCSI connector
J13 External HPDB50 SCSI connector
J14 HDD15 video connector
J15 Processor slot
J16 32-bit MCA slot w/ AVE (in line with J17)
J17 Video slot (used by Clarity)
J18,20,21 32-bit MCA slot
J19 Audio connector
JP1 4-pin Molex power connector
RP1,2,3 SCSI termpacks
U5 82077SL-1 Floppy controller
U16 WPD Falcon E 006-2001895
U27 P8242PC KBC
U34 53C94 609-3400508
U35 86C01 609-3400462
U42/3,51/2,59,60,66/7 DRAM
U53 77C22E 609-3400544
U54 VLSI VY14634-2 006-2004999
U56 VLSI VY14669-2 006-2006190
U57 VLSI VY14634-2 006-2004999
U79 Samsung (?) KDA0476BPL
U81 WPD Clemson 006-2001325
U113 LSI L17A7552 006-2005052
U118,119 MHS 006-2002148
Y1 1.843200 MHz osc
Y2 24.00000 MHz osc
Y3 65.00000 MHz osc
Y4 14.31818 MHz osc

SCSI Termpacks are Dale 8 pin SIPPs, 221-331G (dtd '93)
DRAMs are (x8) Siemens HYB514256BJ-70

Processor Card GAL-LITE CPU W/Cache Adapter, FCC C6P3350-66 [P]

J1 Pads for 20-pin header
JP1 Fan header (Gnd, +12 V, Gnd)
SW1 CPU type selection
U7 Socket 2 ZIF
U8 485Turbocache socket (missing on SX card)
Y1 60.00000 MHz osc (CPU)
Y2 66.6667 MHz osc (DMA)

SX board has a surface mounted SX, no switch, and no L2 cache. The DX2 board has ZIF socket with a switch block next to it, and an L2 cache. Cache Memory Socket supports 64 KB or 128 KB cache module You need the latest BIOS of 1.09.00 or later. 83 MHz upgrade really does improve things...

CPU Settings on SW1

Note: Processor card will not operate if more than one processor type is selected.


Industry standard parity 70 ns 72-pin SIMMs. Six sockets available for memory up to 192 MB.


20 MB/second Micro Channel bus.

Two 50 to 19,200 baud serial ports, One 8-bit parallel bi-directional port.

The 3350 has 4 drive bays. Two are external (the top external bay can hold a 5 1/4" device like a CDROM drive). The other bays are for 3 1/2" devices only. In order to get the fourth bay (the "upper" "rear" bay, two sheet metal extenders are installed above bay three (bay three is the "lower" "rear" bay). If bay four is used, you cannot use the upper front bay for a 5 1/4" device (there is not enough room). 4 MCA slots. One is an MCA video slot, and has the extra connector for the Clarity 1 card.

Video System

NCR 77C22E. with 1 MB of video ram. Capable of 1024x768 256 colors.

Clarity 1 Video Board (Bam-Bam?)

There was an optional video board built specifically for the 3350 called the "Clarity 1". It plugged into a proprietary slot, and was capable of up to 1280x1024. The Clarity 1 has 2 MB. The feature/kit number for the clarity 1 is 3350-F/K256.

> I have a NCR 3350 with a Clarity I video card. Does anyone know if there are Win95 drivers available for this card? Or even who manufactured the Clarity I card for NCR?

Joey Blankenship says:
   MCNCR designed and manufactured the Clarity I card in-house. I was project leader and developer for the Windows 3.1 & NT device drivers for this card. I also worked on testing the existing 3.1 drivers under Win95. They appeared to work fine. I believe that the official position of NCR is that this card is not supported under Win95, but I'm not sure. However, we did get the drivers working both by upgrading and existing Win3.1 installation and installing under Win95. No mods were made to the drivers.

Install CD-ROM

You need DOS CD-ROM drivers to install Win 95 or NT. Take a look HERE.

You have a 53c94 SCSI host adapter on the motherboard. You will need two drivers - the CAM driver and the CD-ROM driver. These two statements must be added to the CONFIG.SYS file in the following order - after any memory manager drivers (such as HIMEM.SYS or EMM386.SYS) and must precede any other "DEVICE=" statements.


DEVICEHIGH = c:\util\ncr\camc9x.sys
DEVICEHIGH = c:\util\ncr\diskidd.sys
DEVICEHIGH = c:\util\ncr\cd-tosh.sys /d:msc001

DEVICE = a:cdscsi-2.sys /D:ASPICD0

Some of the older 1x CD-ROM drives (like the Sony or the Toshiba) needed a specific driver (in place of cd-scsi-2.sys).

Another good utility to download from NCR is PUTSIG which will fix a Reference Disk that's been corrupted by Win95.

Content created and/or collected by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 08 May 2024 - Changelog | About | Legal & Contact