BillC

I still have at least 4 large tower cases(P3 based systems), it's the 360kb 5.25" FDD mechanisms in 486 machines that I regret recycling(~15 years ago) the most.

Some libraries have 3D printers that can be used by card holders, my local library has a Prusa i3 MK3S+ 3D Printer. https://www.orl.bc.ca/using-the-library/our-services/orl-makerspaces/3d-printer

Kier Fraser is also the developer behind the Greaseweazle Flux Controller.

Just look at the signature line in tf_hh posts, there are 2 of them just a few posts up in this thread.

Also used in some games, Moonbase IO is one I know of.

AFAIK the only components on the 400/800 that use -5VDC are the 4116 DRAM and the power LED, if the 4116 are eliminated by a RAM upgrade and the power LED rewired to use +5VDC this should eliminate the need for -5VDC. I also believe that +12VDC is only used by the 4116 DRAM, the color adjustment potentiometer, and SIO pin 12.

There's often a serial# label on the RF shield under the cartridge door, it doesn't have a date stamp but this is often also embossed at the rear of the bottom case as shown in the post immediately before yours.

SpartaDOS X also uses PC letter assignments for drives, I believe "D:" = "D4:"

SideB may also contain a duplicate of sideA, the v1.5 disk I have does.

An SIO2PC/USB device, especially when made from an FT232 based breakout board, is an inexpensive way to run floppy based software as long as there is a PC nearby to connect to.

The Atari 810 doesn't have a track 0 sensor either.

Pay the extra fee to require the recipients signature, and include it in the shipping cost. Porch pirates aren't an issue at my house since my driveway is about 200' long(a pain when the snow needs to be cleared in spite of having a snow-blower), my house is behind the nearest neighbors back fence. I don't even get Trick or Treaters at halloween. https://mangoful.com/usps-signatures-answers/#:~:text=A signature is not always required upon delivery,can see when the package has been delivered. Couriers should have this option as well.

When you do that you risk damaging a marginal disk even further, flux dumps using a GREASEWEAZLE/KRYOFLUX/SUPER COPY PRO are the recommended method. With a8rawconv I have adjusted the -p value when decoding an SCP file and eliminated many errors, 100+ once eliminating all errors, from the decoded ATR/ATX image without re-dumping the floppy.

It most certainly does, in 1992 I visited Bob in Buffalo due to BB instability issues, while enroute to visiting a friend in PEI. Bob was able to swap out some capacitors which resolved the issue, in later years I realized this was probably due to a Phi2 timing problem with the 800XL I normally used.

I believe the later releases of SpartaDOS X are supposed to support 32MB PARTITIONS using 512 byte sectors.

You may not get a response, @Mechanicjay lasted visited AA on January 28 2022. Hopefully he has notifications turned on and still uses the same email address.

The issue is the Greaseweazle software uses the index pulse, as DjayBee posted you should be able to enable the fake index pulse to dump sideB. Floppies with 2 index holes can be flipped, but these are fairly rare. When keeping the original isn't important some have cut the jacket open, removed then reinserted the disc flipped in order to dump sideB.

In the early 90's I used Bobterm with an Intel 9600 BAUD modem @9600 with hardware compression turned on(effectively 19,200) connected to an MIO serial port to access Compuserve.

If you decide to do flux imaging yourself the Greaseweazle v4 costs much less than a Kryoflux, a no-flip modified drive is recommended with both for dumping side B.

I've had communications signal failure between a FreeStyle Libre 2 CGM sensor and the Iphone7 I use as a reader at ~3'. I think that sensor was marginal though, I haven't had many issues since it expired and was replaced. I really like the new feature, previously only available on the FreeStyle Libre3, of updating every minute via bluetooth instead of having to scan using NFC.

To be certain the zener diode can be used to trigger an SCR, making it a full crow-bar circuit, I built a custom power supply with this feature in the late 80's after an INGOT failed and took out the 41256 chips in a RamboXL upgraded 800XL. I also had a Newell 1MB upgrade on order for another 800XL that I planned on using this power supply with as 1Mb DRAM chips were expensive back then.

According to the stamp on the label this 1200XL was manufactured during the 17th week of 1983.

I still have a 400 upgraded in early 1983 with a Mosaic 64KB RAM board and Inhome B400 keyboard, later added an external 1200XL keyboard connected via ribbon cable. The only item missing is the monitor jack.

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