8 Mar
1999
8 Mar
'99
4:29 a.m.
I picked up an 8080 bread board trainer made by E&L Instruments this
weekend. Does anyone have a manual for it?
Joe
8 Mar
8 Mar
7:31 a.m.
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2:33 p.m.
At 06:31 PM 3/8/99 +0000, you wrote:
That sounds about like it. RAM is 4 ea 2111A-4. There is an unmarked
1702 EPROM (A15) and an empty socket (A16) next to it. Does your's have
an IC in A3? If so can you tell me the type? Is there supposed to be
something mounted to the left of the keyboard? Mine is barren but there
are screw holes there.
I picked up an 8080 bread board trainer made by E&L Instruments this
weekend. Does anyone have a manual for it?
If this is the board I think it is [8080 + 1702 KEX ROM + 256 or 512
bytes RAM + 3 output ports going to LEDs + octal keypad + breadboard]
then I found one at a radio rally last year.
I mentioned it on the list, and somebody (I forget who, sorry) posted the
source for KEX, which is enough to figure out how to use it. I can send
said listing to you if you want it.
Yes I'd like to see it.
THe hardware would be _trivial_ to reverse-engineer (about 1 hour at most
IMHO...). I must get round to it...
That's my problem, no time.
Joe
2:07 p.m.
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6:35 p.m.
At 01:07 AM 3/9/99 +0000, Tony wrote:
That's it...
for user
programming?
an IC in A3? If so can you tell me the type? Is
there supposed to be
Here's a full list of the chips :
A1 7404
A2 7400
A3 7400 OK thanks
A4 74174
A5 8224
A6 8216
A7 8216
A8 8080
A9-A12 2111
A13 74LS05
A14 74LS155
A15 1702 (KEX monitor)
A16 1702 (Optional) Any idea what goes here, or is it just available A17 74LS05
A18 74L42
A19 7402
A20 74L04
A21 74L04
A22 7404
A23 7494
A24 7475 (missing, but I am _sure_ that's what goes there)
Yes, that's what's in mine.
A25 7475
A26 7475
A27 7475
A28 7475
A29 7475
A30 7400
A31 74365
A32 74148
A33 74148
Can you tell me the details of connections? Is that what the circuit
runs above the LED are supposed to connect to?
Joe
something mounted to the left of the keyboard?
Mine is barren but there
are screw holes there.
Yes. There's a solderless breadmobard that goes there. It appears to have
connections to the bus as well...
-tony
9 Mar
9 Mar
8:05 a.m.
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8 Mar
8 Mar
8:15 a.m.
At 09:29 AM 3/8/99, you wrote:
I picked up an 8080 bread board trainer made by E&L
Instruments this
weekend. Does anyone have a manual for it?
Joe
See if you can find the May, June 1976 issues of "Radio Electronics", a
"dyna-micro" by John Titus was described there. It was also described some
of the 8080 "Bugbooks", also with John Titus as the 3'rd author with P.
Rony and David Larsen. I think it is the same as the E&L trainer.
Here is an interesting quote from the 8080A Bugbook, 1977:
"Inexpensive microcomputers will eventually penetrate every facet of life.
Today, they can be found in automobiles, sewing machines, microwave ovens,
TV games, vending machines, gasoline pumps, taxi meters, and so on.
Tomorrow, they will be in phones, washers, driers, typewriters, elevators,
heating and cooling systems, children's toys..."
-Dave
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