There is not a single tutorial for REV E board on whole KZbin ffs :(

no turning on, just taking apart....

Nice job on the 500! My first Amiga was a 500 back in 1989. I still have it in much butchered shape as I modified the case to fit a standard floppy drive. That camera in the brown case reminds me of my first 35mm camera when I was a kid in the '70s. It was a coupled rangefinder Balda with a Baldanar lens given to me by my grandfather. I still have it kicking around here somewhere, but it hasn't worked in nearly 50 years!

The black case looks soooo georgous. 😍

Link to the aca500+ case stl please?

That's one beautiful A500!

Having different coloured wires would have been really helpful to both you and the viewers! Also, I note that the modification kit you used did not have a "75R" resistor (?). Mine had this, in addition to the 2.2k and 3.3k resistors, along with the transistor. Might this explain the imperfect video signal? I got my kit on Ali Express.

A 41 episodes series on software development for msdos?! Thank you so much for making this! This will be invaluable in helping me make the game I wanted to make since 1998!

Holy Moly your channel is awesome! Subbed.

11:48 start of coding

Hi, the system that revives the D500 head is interesting, but could you share the operating scheme of this modification? I would like to bring back my old 1541 with the broken head. Great work, many enthusiasts will be happy with it.

thanks for it

for ultimate performance use inline assemby!

kzbin.info/www/bejne/e5mlgqmDjbSHh8k

Great stream!! These are so much fun.

I was playing around with developing a new SD card solution that interfaces to one of the VIAs. It is perfect for drives with broken heads. When using it you can get the real heads to move and the real disk to spin but the data comes from the SD card. This way it feels like you are fully using the original drive. Externally you could not tell if the data is coming from the actual disk or the SD card.

2:15 I'm really surprised that any version of C doesn't have "byte" defined as a type by default, isn't that the most basic type of all?

It's surely not using 12v and 5v. Does it require 5v or 12v?

The c16 was the best looking bread bin ....they wasted their time with the plus 4 they should have just made a 64k c16 with c64 software compatability it should have been a c64 with all the bugs ironed out 121 colours 3 channel audio v 3.5 basic the ted chip is capable of interlacing at 496x320 the demo images are more superior against the c64s limited color they could of easily sold more machines in Eastern Europe and brazil

That's running pretty good for a commodore pet, user defined graphics aswell

i got that for 1$

If you all would run SysInfo4.4, then we could have an apples to apples comparison.

16:49 Twisting the stepper motor more than the distance covered by a siingle step (i.e. a full half-track) is pointless as the next headbump will reset the adjustment. You need to look at and adjust the track-0 head stop instead.

Cool, hopefully many drives can be recovered and work for a bit longer.

You can buy right-angle 4-pin connectors. You could use one as an adapter in between the socket and new circuit to have it lie flat. You should be able to close the case with no soldering or jumper wires if what I see in my mind actually works. A bit of Kapton for insulation at most.

Wow! This is awesome news!! I am a bit of a Commodore floppy addict also, and feel the same way you do. I love putting a demo in and enjoying it. I’m so happy there may be hope for any of my heads that die in the future. I have a couple 1571 also, so hope it does end up working for these drives.

Good stuff. Very thorough review as usual. I have my CBM disk drives tucked away in storage, and at least some of them has the Alps mechanism, but now I'm curious to check if they still work... Do we know this drive head issue only plagues a certain era/type of 1541s, or might affect 1541/IIs, 1551s, 1571s as well?

Could you please post a link to the shop selling the Newtronics NOS heads?

Nice T-Shirt ;)

Nice repair video. Thanks for sharing

I built one. The most disappointing Chinese kit I ever built. In general, I do like Chinese radio kits, and the six and 7 transistor AM ones I built worked well. The actual circuit design is quite reasonable, remembering its simplicity. One IC for FM, one for AM (the traditional MK484 / ZN414 type clone) and an audio amplifier. Mine worked to a level I felt was satisfactory for something so simple. But the kit was let down by poor quality of components, a PCB that was difficult to solder (and the copper came off when it got hot) and the dreadful, ill-fitting case and mechanicals. :-(

tc2...好怀念啊。。。我在上面写了操作系统

If I had 5 panels, can you take a center panel and then add a panel on each side giving you a plus symbol?

Hi very nice project, is it possible to use a cheap cartridge as a donner for PCB ? it should have the same PCB architecture as OOT (with battery for exemple) ? Any recommanded games ? thanks

Cool, you correctly call it the two thousand six hundred instead of the annoying twenty six hundred.

How to make it look better? I’m playing on a 77” and it doesn’t look great. Wondering if there is something I can do to tighten it up a bit

How do you set the output level?

I love listening to videos about programming for retro systems to help me fall asleep, and I can't help but feel like you intentionally put together this series for that purpose, with the background music, and the tone and pacing of your narration :) even if you didn't, thank you!

Great video like always, I like the demo too where can you download to make a disk and test thank you 😉🦾

Interesting findings. Thanks for taking the time to do such a careful test.

Awesome upgrade! The demos look so good on your PET!

Nice comparison. There's quite a few different A500 PSU models though. I have both a switching and a transformer model. Looking at the board, I think even the transformer model doesn't do simple linear regulation for 5V. Also, I wonder how much the ripple varies with the current. Because I suspect that different A500 revisions have huge differences in power consumption. I think Rev 5 and below have 16 NMOS DRAM chips, while Rev 6 and higher use 4 CMOS chips. Same applies to the different 512k trapdoor expansions. From my experience, older NMOS chips get much warmer during operation. So I would expect that a Rev 5 draws significantly more current on 5V than a Rev 6. I don't think anyone made a vid on that topic yet ;-)

Surprised to see that the original Amiga 500 power supply is so light - the C64 one I have by contrast is a real heavy brick.

Thanks for sharing the video. I actually have both solutions on hand. Initially, I bought the Lazarus for Pistorm, but I couldn't get it to work with my rev5 A500. The instructions weren't clear to me when I purchased it, and I didn't realize I needed to add the 7Mhz clock signal to the expansion port. All I found was that it wasn't compatible with rev5 boards. Your video clarified things for me, so now I can switch between the two solutions as I like. Thanks again for the helpful tip!

Is this effect also known as a rotoblitter?

Also one more thing about the 8MiB RAM limit you say and you try to combine it with chip RAM... - there's no such thing. The address space of any Amiga that uses the 68000 is 24 bit (16MiB) and in that address space you can have up to 8MiB _continuous_ Fast RAM, in the Zorro II expansion range from $00200000 to $009FFFFF. In addition, there's up to 2MB chip RAM possible, at the start of the address space, from $00000000 to $001FFFFF. There are also smaller "holes" of the address space, where additional RAM is possible, for example the a range from $00C00000, which is reserved for the 512KiB trapdoor expansion (usually), but actually up to 1MiB here can be used. So that's 9MiB of Fast RAM already, and we still did not take Chip RAM into account... There isn't really a hard limit, but there might be diminishing returns trying to use every small block that would be possible, really. On the Amiga 600, the ACA620 can map up to 10.8MiB of Fast RAM into the 24bit address space - plus 2MiB chip RAM is possible, on top of that. I have no experience with the ACA500, but i _think_ what you see, is a bunch of Fast RAM eaten up by disk buffers. Amiga filesystems can be quite obnoxious with RAM requirements, especially when used with large media. I see the installer copying over PFS3, not sure if that was used, but both that and FFS can eat up megabytes of RAM for buffers easily. This can be controlled in HDToolBox though, and reduced (on the expense of losing some performance).

Pi 4 is supported, Pi 5 won't ever be (most likely) because its GPIO functionality is behind a PCIe slot, and while PCIe has amazing bandwidth, it has appalling latency, and PiStorm needs low latency to be able to react to the 68k bus in time.

I never got a parts list or a schemaic just a photo useless i wanted to learn something i suppose i did How to buy garbage.

Assembler isnt so hard , you just need know interrupts and how you need to use it. Example "HelloWorldProgramDos": _start: mov ah , 09h mov dx , offset msg int 21h msg db 'Hello , world!!$' mov ah , 4Ch int 21h

A plipbox to get the amiga online is both very inexpensive and easy to build. Cheers!