Re: Apple ][ plus 13 sector! Problems...

["Bryan Parkoff" <bryanparkoff@nospam.com>]

Bill Gerber,

    I do not care that 13 sector controller card is broken, but I am sure
that 13 sector PROM is in good condition.
    Understanding Apple II+ manual says that there are two different version
of sequencer logic.  I think that it meant the six commands are in the
different order in the original sequencer logic before newer version of
sequencer logic made some changes by moving commands to another location or
different order.

-- 
Bryan Parkoff
"Bill Garber" <willy46pa@comcast DOT net> wrote in message
zo6dnYg-Wci4B2TdRVn-jA@comcast.com">news:zo6dnYg-Wci4B2TdRVn-jA@comcast.com...
>
> "Bryan Parkoff" <bryanparkoff@nospam.com> wrote in message
> news:40f997a8$0$74186$39cecf19@news.twtelecom.net...
> : Bill Gerber,
> :
> :     It is what I understand that there are two different
> sequencer logic
> : PROMs.  First is to use 9 bits that it can only have one zero
> while second
> : is to use 10 bits that it can only have two zeros.  It is why
> 13 sectors use
> : 9 bits while 16 sectors uses 10 bits.
> :     Do you have 13 sector PROM that you can spare?
>
> The firmware can handle how many zero bits to look for.
> State machine only does what it's told to do.
>
> If you get my name right I will see how many sector
> 13 cards I have, if any. They may just be broken cards.
>
> Bill @ GarberStreet Enterprizez };-)
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> Email - willy46pa @ comcast DOT net
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>
>
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