Re: Info on some Apple // cards?

[Lockar <lockar@nospam.com>]

     Dallas is the name on the last cheap.  Sorry about that I thought
I typed that out.

        -Lockar


In article <1139346932.219293.97980@z14g2000cwz.googlegroups.com>,
<heuser.marcus@freenet.de> wrote:

> >    At u3 = SSI 263 AP
> >                   S8601
> 
> = Speech synthesizer chip. Rare. GT-Reactive sells this chip for $50 -
> which isn't  expensive from what I've read.
> 
> 
> >    At u4 (BUF0) = hm6264LP -15
> >                                 U0422880
> 
> = 8 KB static RAM, 150ns access time. Standard chip.
> 
> 
> >    At u5 (BUF1) = DS1216 -
> >                                  8702
> 
> This is a very interesting "module" from Dallas Semiconductor. To quote
> the data sheet, which can be found here
> http://www.ortodoxism.ro/datasheets/maxim/DS1216-DS1216D.pdf:
> 
> "The DS1216 SmartWatch RAM and SmartWatch ROM Sockets are 600mil-wide
> DIP sockets with a built-in CMOS watch function, an NV RAM controller
> circuit, and an embedded lithium energy source.
> The sockets provide an NV RAM solution for memory sized from 2k x 8
> to 512k x 8 with package sizes from 26 pins to 32 pins. When a socket
> is mated with a CMOS SRAM, it provides a complete solution to problems
> associated with memory volatility and uses a common energy source
> to maintain time and date.
> The SmartWatch ROM sockets use the embedded lithium source to maintain
> the time and date only. A key feature of the SmartWatch is that the
> watch function remains transparent to the RAM. The SmartWatch monitors
> VCC for an out-of-tolerance condition. When such a condition occurs, an
> internal lithium energy source is automatically switched on and write
> protection is unconditionally enabled to prevent loss of watch and RAM
> data."
> 
> There are several different versions of this part so the naming on the
> chip is important.
> 
> bye
> Marcus
>