Surprisingly, Missouri's Grundy County has a scanner feed...

https://www.broadcastify.com/listen/feed/1461

#MOwx #PDS #FlashFloodEmergency

PDS Flash Flood Emergency in Trenton, Missouri.

Flash Flood Warning
MOC079-170830-
/O.NEW.KEAX.FF.W.0016.260517T0235Z-260517T0830Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
935 PM CDT Sat May 16 2026

...FLASH FLOOD EMERGENCY FOR SOUTHERN GRUNDY AND THE CITY OF TRENTON,
MO...

The National Weather Service in Pleasant Hill has issued a

* Flash Flood Warning for...
Central Grundy County in north central Missouri...

* Until 330 AM CDT.

* At 935 PM CDT, Emergency management reported thunderstorms
producing heavy rain across the warned area with numerous roads
flooded and some buckled. Between 5.5 and 7.5 inches of rain have
fallen. Another line of storms will bring additional extremely
heavy rainfall. The expected rainfall rate is 1.5 to 2.5 inches in
1 hour. Additional rainfall amounts of 2 to 4 inches are possible
in the warned area. Flash flooding is already occurring.

FLASH FLOOD EMERGENCY for Southern Grundy and the City of Trenton,
MO. This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND
NOW!

HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.

SOURCE...Emergency management reported.

IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER
GROUND NOW! Life threatening flash flooding of low water
crossings, small creeks and streams, urban areas,
highways, streets and underpasses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4016 9376 4015 9339 3999 9339 4004 9376

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR

$$

CDB

#MOwx #flashfloodemergency #flashflooding #PDS

One thing I really like about ATProto/Atmosphere is the concept of a PDS, or Personal Data Server, storing all your account data.

The other day someone announced https://bookhive.buzz, basically ATProto take on https://bookwyrm.social, but unlike Bookwyrm, which requires you to create a separate account, Bookhive lets you log in with your PDS, most commonly your Bluesky account.

That's actually pretty neat.

And we could have something similar with Federated Credential Management (FedCM).

https://developer.mozilla.org/en-US/docs/Web/API/FedCM_API

Here's a GitHub issue requesting this for Mastodon:

https://github.com/mastodon/mastodon/issues/4800

#fediverse #mastodon #FedCM #indieauth #SocialMedia #ATProto #PDS

PDS – the Programmers Development System – Part 3

This series of posts looks at the Programmers Development System (PDS).

• Part 1 – Introduction, background and some initial reverse engineering.
• Part 2 – A closer look at the PC ISA Interface card.
• Part 3 – Remaking the target interfaces

ZX Spectrum Interface

Here are the remade schematic and PCB for the ZX Spectrum target interface.

This is simply reproducing the schematic found on the CPC wiki, but now in KiCAD. There are a few extras, such as capacitors for the ICs and a pull-up resistor for the unused inverter. The equivalent PCB is shown below.

The PCB uses the ZX Spectrum Edge connector symbol and footprint from https://github.com/alvaroalea/8bits_kicad_libraries.

The jumpers in the top centre of the board use a custom footprint that mirrors the original PCB, but they can easily be replaced with standard pin-headers or even just a simple wire link.

Bill of Materials

• PDS Remake ZX Spectrum PCB
• Z8420 Z80 PIO (NMOS is currently assumed given it has to work with a Z80A at 3.5MHz)
• 74LS245 octal bus transciever
• 74LS04 hex inverter
• Resistors: 1K, 4K7, 10K
• Capacitors: 3x 100nF
• 6x6x6mm tactile button switch
• SPDT slider switch 2.54mm pitch OR 2.54mm header pins and jumper
• 16-way 2×8 shrouded pin header socket
• ZX Spectrum edge connector (straight)

I’m using a standard/common 56-pin edge connector socket which will have to be “doctored” to turn it into a ZX Spectrum compatible socket. There are notes on how to do this online, but I’ve not experimented yet.

Amstrad CPC Interface

This is very similar to the ZX Spectrum, but the address decoding gives it a different address (see part 1 for details).

The PCB is using a custom 2×25-way edge connector taken from the ZX Spectrum one used previously. It also uses the same custom jumpers as the ZX Spectrum version.

Bill of Materials

• Z8420 Z80 PIO (NMOS is currently assumed given it has to work with a Z80A at 3.5MHz)
• 74LS245 octal bus transciever
• 74LS04 hex inverter
• 74LS032 quad 2-input OR gate
• Resistors: 1K, 4x 4K7, 10K, 1M
• Capacitors: 4x 100nF
• 6x6x6mm tactile button switch
• SPDT slider switch 2.54mm pitch OR 2.54mm header pins and jumper
• 16-way 2×8 shrouded pin header socket
• 50-pin (2×25) edge connector (straight)

I think the edge connector will be a standard 2×25 way, 2.54mm pitch, edge connector socket that will look something like this:

But someone who knows about the Amstrad CPC will have to confirm this is the right one!

Conclusion

These boards come with a HUGE CAVEAT: they are completely untested and in the case of the Amstrad CPC version, a whole pile of ignorance, as I know effectively nothing about the machines.

I think I’ve got the edge connector in the correct orientation for both, but that is still to be verified.

I’ll probably build the spectrum version, but there is little reason for me to build the Amstrad one unless I can find a machine to try it on!

For now, these are just documenting the current state of play with remaking these boards.

All files are currently in a private GitHub directory as I’m not sure what the licensing issues are going to be. But if you’d like to collaborate with me on getting them built and tested, drop me an email and we can chat.

Kevin