Hi folks - hope there's a history buff out there that can help me please.
Google has not been my friend or I'm just searching wrong.
I am trying to ascertain what the last computer released by Tandy/Radio Shack was that had the TRS-80 name on it (as opposed to
later machines that used the name Tandy).
I think it was the CoCo 3 in 1986 but I'm trying to nail down the (official) day and month of release (assuming that I'm right and
it was the CoCo 3).
Thank you!!
Kevin Parker
How bad do you want the item? If you can live without it message the seller through eBay and offer him the real winning price. Basically on second chance he is offering you your highest bid price (the one that lost out to the original bad bidder). What it should really be is if that guy didn't exist what would have been the winning bid??
So say three of you guys bid as follows:A: 201 (bad bidder)B: 200 (you)C: 102 (some other guy)
Seller is offering you 200 as second chance but the real winning bid is 104.50.
Of course if you really want/need the item then you are SOL.
One note there is one special ahole out there based in Italy but sells with listing listed in Europe and Alaska. Has a number of handles (scroogemcduckbonaparte, dagobertduckbonaparte, paperonebonaparte, amongst others). He is a pure scamming thief and does shill bid.
Come on people, please i) try doing some actual research to see if theories
hold water, don't just quickly post, and ii) read prior posts thoroughly.
Searching for "pdp-11" (where the "'s are to indicate what's in the search
box, and are _not_ typed into the search box) turns up a host of items - all
PDP-11, and none PDP-8, so it's not searching for "PDP -11".
And as I have pointed out several times already, searching for "PDP-11 parts"
in sold items turns it up, despite there being a "-" in the middle of a search
term).
Noel
I bid on something, 1 hour later I got this:
Due to eBay reporting the highest bidder as a spammer this item is now
available at your last bid price of xxxxx. If you would like to purchase it
please arrange payment and collection. If you're not interested I would
appreciate a quick message as there is another person who is interested if
the item is still available. For security, please keep all communication
through the eBay message system.
And then an hour or so later I got:
Hi (Again) eBay playing strange games removing item after sending second
chance offer!! I've been advised by eBay to re-send this as they removed the
item because I didn't cancel the transaction from the original suspicious
buyer that they had already cancelled the bids from and sent a MC067 notice.
Can you believe it??? So sorry for the duplication, but this is a genuine
second chance offer. If you are interested (or not), please let me know
either way as I have another person interested, but thought it only fair to
give you first refusal.
Feedback is 100% on 56 items.
I am not good at understanding all the possible scams, and I know others
here are.
Regards
Rob
> From: W2HX
> I filter on category "Computers/tablets & Networking." It might not have
> shown up in your search if you searching in "Vintage Computing"
> category.
Oh, I forgot to mention: I always search in 'All Categories' precisely to
avoid misfiled entries (like this one). (For a while it was defaulting to
"Vintage Computing" for the "PDP-11" and "DEC Digital" searches, which I had
to manually reset to 'All Categories'.)
But that's not it: go into the eBait search, enter "PDP-11", and select 'Sold
Items", it's not there; add "parts" to the search, and up it pops! WTF?!?!?
Noel
Hi, All,
I've been doing component-level diagnosis of a bad Amiga 1000 WCS
board and since I was unable to find this information anywhere, I
thought I'd post it to the list so that it's in the hands of more than
one person.
For an Amiga 1000 that starts up with a turquoise screen and never
asks for Kickstart, it means that the WCS RAM test has failed. Common
causes are one or more bad 4464 DRAM chips on the WCS board or a bad
PAL. I don't happen to have the PAL equations but I did spend some
time with a sick Amiga 1000, a Fluke 9010A and a cheap digital scope.
There are hand-drawn schematics floating around but they don't appear
to match the production hardware in either part placement or
completeness (the schematics describe 2 PALs, DAUGCAS and DAUGEN, but
the production hardware has two additional PALs, DPALCAS and DPALEN,
for one specific example).
If one has a Fluke 9010A and 68000 pod, one can test the WCS RAM by
pressing [RUN UUT] and turning on the Amiga and waiting a second or
two for the ROMs to set the right memory map bits to make the WCS
writable. One can then do simple [READ] and [WRITE] tests to the
Amiga at $FC0000-$FFFFFF and even run a [RAM SHORT] on part or all of
that range (a RAM SHORT test on 256Kbytes will take more than a few
minutes).
The memory itself is a bank of 8 4464/50464 64Kx4 DRAMs at U1B-U1E and
U2B-U2E, arranged sensibly in two banks of 128Kbytes. The chips in
row 2 are the lower half ($FC0000-$FDFFFF) and the chips in row 1 are
the upper half ($FE0000-$FFFFFF). The individual bits are arranged as
follows:
U1E/U2E $000F D0-D3
U1D/U2D $00F0 D4-D7
U1C/U2C $0F00 D8-D11
U1B/U2B $F000 D12-D15
For those that want to trace individual bits the order on each DRAM is
pin-3, pin-2, pin-15, pin-17 which is slightly off the given order on
the 4464 datasheet of 2,3,15,17.
By way of verification, the WCS board I'm repairing failed the RAM
test with bad bits at $F000 when I pulled the defective chip from
position U1B. The same chip failed testing in a Ming HT-21 "Handy
Tester" DIP logic and DRAM tester (but passed when tested as a 4416,
because the fault was not in the first 25% of the memory cells).
-ethan
