Adaptec NODEM
Internals
SCSI
adapter ties computers and peripherals into Ethernet Adaptec NODEM
Ethernet Controller Adds Communications To SCSI Bus
[uses non-Adaptec components]
pazmanian said
"I happen to have one of these in box with manual and power supply... it was an eval unit that I used for a short time."
NOTE: The Main Board P/N is generic, but the Media Board's last three digits correlate to the NODEM unit's P/N. Ex. Cheapernet Media BD 417606-00 is part of the NODEM-E (419600)
NODEM-C (419500) Thick Ethernet with AUI and DB-15 connector
NODEM-T (419700) SynOptics Ethernet with on-board MAU and RJ-45 Connector
NODEM-E (419600) Thin Ethernet with on-board MAU and a BNC connector
O/S Support
Macintosh "NODEM System Diskette for Apple Macintosh", Ver 1.0
Supplied with a system diskette for Plus, SE, Il, and future Macintosh computers.
PC and PS/2 Real Soon Now [RSN]
"In the near future, Adaptec will introduce IBM PC and PS/2 system diskettes for Nodem that will allow existing hardware to be used with IBM PCs and compatibles."
OS/2 Real Soon Now [RSN]
Adaptec has plans to introduce additional Nodem software supporting LAN Manager and OS/2 networking applications.
NODEM Set [from pazmanian]
NODEM Block Diagram Computer Design V27 N14 Pg 27
AIC-011L Serializer / Deserializer (SERDES).
AIC-290L
AIC-301L Buffer Control
AIC-6225 (1,7 RLL) Data Separator [VCO internal to AIC-6225]
AIC-6250 SCSI controller
NODEM 419404-00A [masked 8051 -12 ?]
NODEM Main BD 417406-00 Rev A [from pazmanian]
| DS1 Power LED DS2 SCSI Activity LED DS3 Network Activity LED J1,2,? 10 pin header [Media Board] J3 6 pin header J6,7 50 pin Centronics S1 SCSI ID switch Grayhill U5 pads for 28 pin SOIC U8 Adaptec AIC-6225-20 U9 Adaptec AIC-290L U10 Adaptec NODEM 419404-00A |
U11,17
Adaptec AIC-301L
U12 M5M5256FP-10L U13,16 CXK5864BM-10L U14 pads for 28 pin DIP U18,19 Adaptec AIC-011L U21 Adaptec AIC-6250DL U22 LM3524N U24,25 TI UA9639CP W3 3 pin header Y1 20.0 MHz Y2 16.0 MHz? 49S160 |
DS1 Color Code: Power-on (yellow), Ready (green), Error (red)
U10 Adaptec NODEM 419404-00A is this a masked 8051 -12?
U14 28 pin DIP Optional 16K firmware EPROM slot for on-board Nodem system firmware (for connection of disketteless devices) ? Like RPL?
ST TIP115 Complementary Silicon NPN Power Darlington Transistor
System diskettes include downloadable (to RAM) Nodem system software and firmware - ensuring simple upgrades
"The system diskette can be copied onto a hard disk, automatically loading each time the host system is turned on."
NODEM Cheapernet Media BD 417606-00 Rev A [from pazmanian]
| CB1
251 1.5A 32VDC 250VAC J1 10 pin receptacle J2 10 pin receptacle J3 10 pin receptacle J4 Thinnet BNC connector |
J5
AC power jack T1 ESC 4779 U1 DP8392AN VR LM317T P+ |
NOTE: P+ indicates enhanced factory testing
J1,2,3 mate with ten pin headers on the Main Board.
CB1 External SCSI power circuit breaker ?
This puppy has some hellacious electrolytic capacitors.
Snap-in Media Cards
* Thin Ethernet with on-board media access unit (MAU) BNC connector
* SynOptics Ethernet over TP with on-board MAU and RJ-45 Connector
* (Thick) Ethernet with AUI to external transceiver and DB-15 connector
POWER
The wall-mounted power supply/transformer connects to J5 on the Media Board. It looks to feed the main board power section through one of the 10 pin receptacles..
16 volt AC @ 2A, 40 watts, 47-400Hz [potentially 2.5A]
Moussa did MATH and said "16v x 2A = 32 watts, you're missing 0.5A"