Microsoft, or is it Micro-Soft or MICROSOFT, is a 50 yr. old trans-national
corporation. Whether it has been good or not-so-good for society is
debatable but on the financial-side its been very kind to investors(the
earliest ones anyways). Capitalism certainly owes Microsoft a good nod!
Happy computing.
Murray 🙂
Follow-up:
Vendor now on eBay for Fairchild 75325DC in lots-of-five; they accepted my
Best Offer.
https://www.ebay.com/itm/333675901157
So now I can get back to making some progress on repairing the H222A in my
MM11-DP :-}!
From: pbirkel(a)gmail.com
Sent: Friday, March 11, 2022 10:01 AM
To: General Discussion: On-Topic Posts <cctech(a)classiccmp.org>
Subject: Seeking a MC75325L Dual Memory Driver
I have here in my hands a DEC H222A (16Kx18), part of a MM11-DP, that took a
blow at sometime in the past. In consequence there are a number of small
parts damaged (snapped diode, crushed axial electrolytic, chipped mica
capacitor, cracked/broken SIP resister net) but those all appear to be
relatively easy to replace.
What's not so easy to replace is the MC75325L Dual Memory Driver (L =
Ceramic) that was de-lidded in the process :-<.
I am wondering whether anyone has one of these ICs in their spare parts
drawer that I could acquire?
I do see a MC75325P (plastic) on eBay at littlediode_components for ~20USD,
plus a surprisingly modest shipping charge (Royal Mail International).
UTSOURCE claims to have a supplier of the ceramic part "new", with a
significantly higher shipping charge.
Before I go with the ceramic part (IMO not the sort of packaging that gets .
remarked) I thought that I would check here for alternative sources.
Thank you,
paul
I prefer to use the Daily Digest mode. Then you can quickly glance at the topics and decide whether it is worth reading any particular messages. The pain comes when you may want to contribute something, as then you need to reconstruct enough of the message of concern in a new composition and reply that way.
Kevin Anderson
Dubuque, Iowa
Message: 3
Date: Thu, 23 Jan 2025 08:44:29 -0700
From: ben <bfranchuk(a)jetnet.ab.ca>
Subject: [cctalk] Re: AI? Really?
On 2025-01-23 8:15 a.m., Alexander Schreiber wrote:
On Tue, Jan 21, 2025 at 12:52:49PM -0700, ben via cctalk wrote:
On 2025-01-21 10:54 a.m., Paul Koning wrote:
Uh, what? How would the earth surface gravity be that much different? "Citation needed" as Wikipedia would say.
paul
https://en.wikipedia.org/wiki/Autodynamics
Ah, crackpot nonsense: "mainstream physicists have considered autodynamics
a crackpot theory for decades" - which is right there on the Wikipedia
page.
Kind regards,
Alex.
How lucky I am that I am not a "mainstream physicist".
A true scientist looks at the evidence, not what is discussed by others.
I also like the expanding earth theory, vs continental drift.
Where is all that energy to move the plates around.
The answer to your question is one that even mainstream physicists (Lord Kelvin) have gotten wrong in the past. See https://www.americanscientist.org/article/kelvin-perry-and-the-age-of-the-e…
A little humor for the group.
Among my other "legacy" systems I also have and still fool around
with a bunch of TRS-80's. Believe it or not, the Z80 based TRS-80's
were among the systems for which a version of STVOS was available.
Thought I would look to see if any of it was still floating around.
Asked Google
"TRS-80 Software Tools Virtual Operating System"
Got this result at the top of my response generated by whatever AI
engine they use.
--------------------------------------------------------------------------
A "TRS-80 Software Tools Virtual Operating System" refers to a software
program that allows a modern computer to emulate a vintage TRS-80
computer, essentially creating a virtual environment where you can run
old TRS-80 software, including operating systems like TRSDOS, by
simulating the hardware and functionality of the original machine,
letting you access and use programs designed for the TRS-80 on your
current computer.
---------------------------------------------------------------------------
That is the biggest pile of steaming poo I have ever seen come out of
any of the various AI engines I have run into. Not one piece of it is
accurate other than the mention of TRSDOS.
I also have a bunch of iRobot Roombas in my house. Based on my
experience with AI and robots I think there is no chance we will
have to worry about any Terminators in the future.
bill
Hi Folks!
Anyone have one or more of the old TI CPUs? The usual suspects don't
stock it (Unicorn, Abra, Jameco...). I have a customers game board in
where the CPU was backwards and previously destroyed...
In case anyone is curious the game was from Japan - Universal's COSMIC
GUERILLA.
This is NOT the TMS9918A - video chip - that some folks are trying to
emulate with Raspberry Pi(e)s.
Thanks!
John :-#)#
--
John's Jukes Ltd.
7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
Call (604)872-5757 (Pinballs, Jukes, Video Games)
flippers.com
"Old pinballers never die, they just flip out"
How much for the quadra VRAM and how many are there?
-----------------------------------------From: "Juan del Pino via
cctalk"
To: cctalk(a)classiccmp.org
Cc: "Juan del Pino"
Sent: Tuesday January 21 2025 11:24:00AM
Subject: [cctalk] Ram and vram
Hello, people:
anyone interested?
hitachi hb56a19a. 150
TC514400ASJ-70
256KB VRAM Apple Macintosh Quadra 700 900 950 68-Pin SIMM RAM 70ns
MT42C8128DJ-7 50
IBM Memory Ram 4MB 1M x 32 B1D1320BA-7
DRAM SIMM 72 PINES 60NS 16MB TI TMS417409ADJ-2E. x2
Thanks
I'm in the process of restoring a PDP11/20. Here is what is working so far:
KA11 PDP11/20 CPU , power supply, programmer's console, etc.
32Kx16 SRAM/ROM board of my own design (Core memory will come later!)
KE11-A Extended Arithmetic Element
RX211 controller with RX02 drive, cleaned, spindle bearings replaced, aligned, tested, and working
DL11-W Serial Line Unit with Real-Time Clock
DL11 2nd serial port, modified to operate at 19,200 baud
VT100, connected to the DL11-W
I've written a program that lets me load a raw disk image (via Xmodem protocol) from the serial port onto a floppy disk, and verify the write. This works great, for both single-density and double-density. (It can set the media density as needed too.)
I'm now looking for a bootable RT-11 floppy disk image (just a raw image, e.g. .IMG) that can boot and run on this limited hardware. The file should be exactly 256,256 bytes long if single-density, or 512,512 bytes long of double-density. (Actually, anything bootable on this hardware would be appreciated!)
I'm new to this forum - let me know what is the protocol for giving you my email address...
Thanks!
Martin E.
