• Please review our updated Terms and Rules here

1994-1996 Samsung/AT&T Sens 700/800/Notemaster 486P/S3945T/Globalyst 200/Safari 3151

creepingnet

Veteran Member
Joined
Feb 25, 2005
Messages
1,097
Location
Reno, NV
1994-1996 Samsung/AT&T Sens 700/800/Notemaster 486P/S3945T/Globalyst 200/Safari 3151

filedata/fetch?filedataid=61555



Further de-tangling the mess of four laptop manufacturers from the mid 1990's with ties to NEC, Samsung, AT&T, and NCR - we are now divulging into the Samsung built machines.

The Samsung Notemaster was a series of laptops manufactured from about 1991-1994 by Samsung electronics, best known today for UHD TV's and Smartphones, and of course - still today, laptops. In 1994 Samsung changed the name from "Notemaster" to "Sens" - meaning Samsung Electronic Notebook System. The difference was the Notemaster was 486 SX and 486 SL based, while the SENS 700/800 models were based on a 486 DX2 SL, 486 DX4, or Pentium processor.

NCR/AT&T Used the Notemaster/Sens for their entry-mid priced 486 Laptop range while using rebranded NEC Versa PC-4xx models for the higher end.


cjUbC0Iln_msPjvW6rLoPVTG_yg0kUydFVhVpceHxGPEEWcRS4Aobu10Ny9y3O_iLBHCj9DBTGQbEArX3hr6vMy48eWEI6...jpg

SAMSUNG NOTEMASTER 486P/S394ST
(aka. AT&T Safari 3151 & AT&T Globalyst 200)
PSU: 19vCD center negative with barrel jack connector
BATT: 9.6V 2500mAH Nickel Metal Hydride, 3 contact
CPU: i486 SX-33, i486 DX2-50 SL, i486 DX4-75 (S3945T)
RAM: 8MB on board with a maximum of 24MB
FDD: 1.44MB 3.5"
HDD: 250-500MB IDE HDD 2.5" 44 pin
GFX: 1MB WD90C24 SVGA Chipset/LCD Controller
SND: Internal Speaker Only
EXP: 2x PCMCIA Type II/III
GFX: DTSN Color or Active Matrix Color 640x480, 9.5"
O/S: MS-DOS 6.xx/Windows 3.1
PRICE: $1500-3000

The Notemaster 486P and AT&T Safari 3151 were introduced in 1994 as a entry-mid level 486 notebook computer. For the time they are of a very sleek design. The Samsung/AT&T parallels started with NCR years before with the NCR Safari 3150 and earlier models which were based on earlier versions of the Notemaster. They generally rated, per PC Mag, as a mid-tier machine, not performing at incredible benchmarks like the IBM ThinkPad, Compaq SLT, and NEC Versas of the time, but being a pretty good value considering you could get an Active Matrix screen, and it had a pretty decent keyboard. Battery life was nothing to write home about at 1.5 Hours roughly - which I can attest to as I owned a AT&T Safari 3151 with working battery back in the 2000's (see my "Alabama Years" gallery for that computer).

BS4V1rHY800BmvE45bTzksUmst31WF4ZFvfYpf5QJpUoeyWAKRLN6o-9WpAlpd81xTV4ihipugXngkx8ILYZPtn2sseH0I...jpg

SAMSUNG SENS 700/800 SERIES
PSU: 19vCD center negative with barrel jack connector
BATT: 9.6V 2500mAH Nickel Metal Hydride, 3 contact
CPU: i486 DX4-75, i486 DX4-100 (700), Pentium 75, Pentium 90 (800)
RAM: 8MB on board with a maximum of 36MB, Pentium models came with 256K L2 Cache
FDD: 1.44MB 3.5"
HDD: 340MB, 520MB, 722MB, 772MB, or 1.3GB, 2.5" 44 pin
GFX: 1MB C&T 65545 Chipset VIdeo and LCD Controller
SND: "Full Business Audio" - Meaning most likely a Windows Sound System Chipset - with built in Mic and Speakers
NET: Infrared Network
EXP: 2x PCMCIA Type II/III
GFX: DTSN Color or Active Matrix Color 640x480, 9.5" or 10.5", with later models being 800x600 @ 10.5"
O/S: MS-DOS 6.xx/Windows 3.1, later came Pre-Loaded with Windows 95 per advertising
PRICE: $1799-2,949

The Samsung Sens 700/800 were a later marketed version of the 486 line easing into the Pentium line before a full redesign in 1996. It also appears they may have had an AT&T rebranded version - possibly still as variants of the Globalyst 200 - but this is not entirely clear from my research. It's been also hard to find out what sound chipset these have but "Full Business Audio" sounds very likely that these had a Crystal Semiconductor CS-4231-XX series WSS Compatible chipset. Whether this has OPL support or not is not clear either. The Sens line has continued to be around since that period in time.

images?q=tbn:ANd9GcTadxXcxaQOPhZz7U_DStA60xY330A7Psrs5A&usqp=CAU.jpg

The NCR/AT&T Versions of these machines, such as the Globalyst 200 shown above, share the same distinctions as the difference between NCR/AT&T machines built by NEC - the power button, keyboard Function key-combo highlights, lid latch, and other accents, are all a bright foam green color, and the keyboard bezel, and screen bezel are a brighter gray color. Otherwise, their specs are pretty indicative of what model of Samsung Notemaster/Sens they are rebadged as.

A BIT ABOUT THE BRANDS/MIX & SOME SPECULATIONS

NCR - National Cash Register, was bought out by AT&T in 1993, when they were already having Samsung make laptops based on earlier versions of the Notemaster. That same year they started having NEC badge-manufacturer their Ultralite Versa 33 models as the AT&T Safari 3180. In 1994, the Safari 3151 became the low end model, and the Safari 3181 came out, as a rebadged NEC Versa 50 or 75E. In late 94', the 3151 was rebranded the Globalyst 200 and took the S3945T model options (DX2-50 and DX4-75), and the Globalyst 250 came out which was a re-badged NEC Versa M/100. In 1995, AT&T/NCR stopped using both brands.

It is also possible that NEC and Samsung were possibly using NCR as a secondary factory for their models as well. NCR has made standard computer equipment before and it may have been to increase production, and possibly lower prices, Samsung kept their plants in China going, and NEC theirs in Japan, and then outsourced some builds to external factories late in their respective products lifecycles. This is all speculation though.

IN TODAY'S VINTAGE PC MARKET

In present day, these machines don't get a whole lot of notice but seem to be going for around $100-150 BIN, though offers are likely lower and "sold" listings don't reflect the actual sold price from an offer. Most people are very unaware Samsung was a thing prior to 2000, including the original Wikipedia article on the Sens which lists the series as starting in 2000, not 1994. I would mostly value them in the $75 or below bracket depending on specs. It seems the most common problem - for the Globalyst 200/Safari 3151, is the screen stops coming up on boot after some time. It could be just a cable issue or it could be something the LCD panels these use are prone to. On a flip-side from their AT&T/NCR NEC-built stablemates, the keyboards on these are among the best, on ThinkPad level, but the trackball is a little stiff and the buttons offer little-to-no feedback compared to the NEC Versa VersaTrack trackballs found on later AT&T and NCR models. Performance is more than adequate for most stuff circa 1990-1996, and they do take to upgraded drives fairly well. Another good-runner in the world of lesser-known vintage laptops in the 486/early Pentium class.
 

Attachments

  • cjUbC0Iln_msPjvW6rLoPVTG_yg0kUydFVhVpceHxGPEEWcRS4Aobu10Ny9y3O_iLBHCj9DBTGQbEArX3hr6vMy48eWEI6...jpg
    cjUbC0Iln_msPjvW6rLoPVTG_yg0kUydFVhVpceHxGPEEWcRS4Aobu10Ny9y3O_iLBHCj9DBTGQbEArX3hr6vMy48eWEI6...jpg
    54.8 KB · Views: 9
Last edited:

Petr

New Member
Joined
Jan 14, 2023
Messages
2
Samsung Sens model 700
WD90C24 - SVGA 1mb on board
ES1488 - soundcard (220 i5 d1)
486DX4 100 - L1 casch 16kb, w/o L2 casch
 

kleung21

New Member
Joined
Apr 26, 2017
Messages
9
Location
Richmond Hill, Ontario - CANADA
Hmm... doesn't seem like I can edit my posting. Anyways, I have a AT&T GLobalyst 200s == Samsung SENS 700.

Disassembly.
- bottom - there are 4 screws hidden by the rubber feet pads
- back - 1 screw in the I/O cover area
- Under keyboard (keyboard is can be pried up from the spacebar side - hinges upwards towards the back);
==> there are 4? screws under the keyboard

Keyboard / track ball ribbon cables are secured using a retention latch that slides out.
Video monitor cable is socketed in proprietary format.

CPU and expansion module are on daughter boards that just press down. You won't be able to remove the above ribbon cables for keyboard/trackpad? without popping out the RAM module.

The CMOS battery is a pain to remove as it is taped to the underside of the upper case.

CMOS battery is a Varta 7.2V 60mah 6/v60h Nimh with what appears to be a fairly standard connector. It did NOT look like it was leaking but on disassembly, corrosion/acid must have followed the wires and both the underside of the keyboard housing and the cmos battery connector had telltale corrosion. PLEASE REMOVE THE CMOS BATTERY.

The saving grace is that since the CMOS battery is taped AWAY from the motherboard, it doesn't seem that a lot of the liquid got on to the motherboard as it might have evaporated before reaching critical traces.

The main battery pack is a ATT NiMH battery - 3 terminal proiding 9.6V @ 2500 mAH
Type no 6-2500

The floppy drive is sadly a belt driven Citizen W1d (all of these drives have failed) with a ribbon cable. The ribbon cable does NOT seem to have a ZIF/latch on the motherboard side and seems to just be gently/firmly pulled out or inserted.



QUESTION -
I have a 16 mb RAm expansion module (transcend brand) but my computer seems to crash intermittently when this module is plugged in. I suspect bad ram / bad connection. Is there any way to test this? The RAm module says lifetime warranty but I presume that doesn't apply to vintage computers??? anybody else ever have any luck with this.
 

kleung21

New Member
Joined
Apr 26, 2017
Messages
9
Location
Richmond Hill, Ontario - CANADA
Anyone know which Samsung system this one is? Looks like whatever would have come right after the SENS 700.

Great catch. The FCC ID is the same as the globalyst 200s. That IS the sens 700.

FCCID A3L53945E == Samsung sens 700, AT&T Globalyst 200s, AST Advantage Explorer 212
 

kleung21

New Member
Joined
Apr 26, 2017
Messages
9
Location
Richmond Hill, Ontario - CANADA
Huh, weird. The design looks a bit different.
Agreed. But I just double checked and if you look at the bottom pic with label. I just noticed that it still has the sens 700 written on the bottom right corner. They must have changed the case plastics.


I also wanted to add that I managed to get the open flops w1d usb floppy emulator that Nick Silvestri designed to work on this

The original floppy is a citizen w1d with the belt drive. They need to be refurbished at this point with new belts.
 
Top