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- From: Stephan_Skrodzki@ka.maus.de (Stephan Skrodzki)
- Newsgroups: comp.dcom.modems
- Subject: Re: Upgrading a ZyXEL 1496E to
- Message-ID: <A12768@KA.maus.de>
- Date: Sat, 02 Jan 93 00:04:00 GMT
- References: <A14023@HB.maus.de>
- Organization: MausNet (Mitglied im IN e.V.)
- Lines: 35
- X-Gateway: MausGate/News 1.14D/hb
-
- mckeeveb@monashee.sfu.ca writes:
-
- m>jack@sybil.jpl.nasa.gov (Jack Kobzeff) writes:
- m>>from a E to a E+. They said that the major changes are that the clock speed
- m>>is higher and the EPROMS are larger. I reaaly didn't get into much detail.
-
- m>If it was just that, then I could do it in my sleep!
-
- Nop! That's not all. First You must recognize that there are different versions
- of 1946E models... Some 'middleaged' E models have the + PCB and the CPU is in
- a socket... They also have Jumpers to change between 13.333 and 20 Mhz. So it's
- not so hard to plug in a new CPU (16Mhz version) an change the jumpers...
- But that's not all (again :-() Also there ist a piggy pack on the Modems
- mainboard. This PCB carries the DSP-RAM. There a two different versions of this
- piggy pack: One is of 1990 (it has 5 chips or so and the soldering side
- (this side You see when you open the ZyXEL) hasn't any wires on it, it's just
- ground). The other one is of 1992... it has 7 chips or so and you see a normal
- PCB-structure ;-) on the soldering side.
-
- But also when You have the + PCB and the new DSP-Ram PCB it doesn't work fine
- with 5.04EP-Roms. (I was told, that it works with 5.01EP-Rom's but that's out
- of interest for me). Someone told me to try the 5.04RP (rack mount modem) and I
- did, but it worked also not so good...
-
- So what's my claim to write this whole story without any conclusions?
-
- I'm very interested in how the 5.04EP Roms do recognize why the modem is not a
- real bought + ... There must be more to check (or change)...
-
- Steve
- -------------------------------------------------------------------------------
- Stephan Skrodzki Stephan_Skrodzki@KA.MAUS.DE (only short mails ;-)
- Skrodzki@Telematik.Informatik.Uni-Karlsruhe.DE
- Phone 49 721 495236 Fax 49 721 401799
- -------------------------------------------------------------------------------
-