Re: What card is this?

["Bill Garber" <willy46pa@comcast.net>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message
20040219035037.11576.00002171@mb-m12.aol.com">news:20040219035037.11576.00002171@mb-m12.aol.com...
: Roger Johnstone wrote:
:
: >In <5e7193b4.0402182103.22fbc085@posting.google.com> Willi
Kusche wrote:
: >> Hi, y'all!
: >>
: >>     I have a small card with 3 chips.  Two are 8K by 8
static RAM
: >> chips (TC5565APL) and the other is marked PAL 20R4AC6N.
Across the
: >> top is "(C) 1986 THE ENGINEERING DEPT. INC.".  Up the side
is
: >> "SR010081".
: >>
: >> Willi
: >
: >I believe you have a 16KB language card for an Apple II or
II+.
: >By the time this card came out 16KB of static RAM was cheap
enough
: >that it was worth using instead of dynamic RAM. Dynamic RAM is
: >cheaper than static RAM, but it requires a lot more support
: >circuitry. The other chip is a PAL, or programmable array
logic,
: >which can be used to replace several normal logic chips.
: >
: >The Engineering Department is best know (or least known?) as
the
: >company that designed the PC Transporter, the IBM PC emulation
card
: >for the Apple II. Applied Engineering bought the PC
Transporter from
: >them and finished the development of it. I don't know if they
bought
: >the entire company, but I suspect AE hired their engineers and
bought
: >any other products they had, so this card may have been sold
by
: >Applied Engineering.
:
: Yes, and Applied Engineering (a connection?) also built the
Pocket
: Rocket 16KB card, with four chips--the two SRAMs, a 16L8 PAL,
plus
: a 74LS245 data buffer (maybe the SRAMs didn't have enough drive
for
: reliability in a loaded system).
:
: Date codes for the Pocket Rocket I have (thanks, Bill!)
indicate a
: mid-'87 manufacture.  This sounds like the follow-on design to
the
: OP's card.

You're welcome. Wanna buy a Saturn? How about the whole II+?  8-)

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy4SPAM6pa@comXcast.net
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