Re: //c Upgrade ?

[astdm@orion.alaska.edu (Malone)]

In article <2tbbhf$f4g@usenet.INS.CWRU.Edu>, ah499@cleveland.Freenet.Edu (John Daniels) writes:
> 
>>I have a question about the //c upgrade to fix the timing problem (going faster
> than 1200 baud).  Is this upgrade a motherboard swap or just a chip (or two)
> replacement?  The upgrade I am refering is to the original //c that will allow
> it to go faster than 1200 baud.
> <
> 
> The upgrade to cure the modem port timing problem is a motherboard swap.  The 
> original boards divided the frequency of the CPU's clock chip to get the 
> frequency for the serial port and it wasn't exact enough for the higher speeds.
> The replacement motherboard has a seperate crystal to control the serial port
> frequency.
> 
> The chip-swap upgrade can make your //c Unidisk 3.5" compatible.


Hmm, this sounds like my dealer is fixing the wrong problem.  He specifically
told me that it was a chip replacement and NOT a motherboard swap.  I called on
Fri and he told me he was having problems figuring out what was wrong but it
should be ready Monday.  I'll have to track this guy ...