Search results

Okay, first off, it's very easy to determine that the horizontal timings are in units of four pixels. The first half of the third set of 8 bytes seems to be some sort of flags (the 24th byte takes on values of $30, $c0, $f0, $f3, and $f8), possibly coarse scaling of the pixel clock multiplier...

Congratulations!

There can be off-by-one issues all over the various timing register values due to latency issues between recognizing that the sync state machine needs to change state and actually changing the state (the vertical sync state machine needs to transition synchronously to scanline boundaries, so the...

Apparently, I can't leave this thread alone tonight. This is a BSR with a 32-bit offset, targeting $0000063c. Looking at the 1024x768@60 mode, I see an htotal value of $014f (335), times four to get pixel clocks is 1340. The vtotal is $328 (808), giving 1340 * 808 = 1082720 pixel-clocks per...

I'll go one further, as I think that I have the weirdness figured out: For all modes except the first 1024x768 mode, it's 8 pixels per clock of the horizontal timing machine. For that one other mode, it's 4 pixels to the clock. And the corresponding difference in the record is that fairly early...

The 0F near the beginning feels like some sort of clock scalar for the horizontal resolution (note the odd entry out on the 1024x768 modes and the corresponding horizontal timing parameters). The 000F002200CC00D7 is the horizontal timing parameters. I'm not quite sure what's going on here, but...

Easy fix. Clean it up, scrape any soldermask off the via, and run a bodge wire from the new capacitor to the via.

Does it need to be desoldered, or can it be dumped by reading it over NuBus?

$4244 is the HFS filesystem signature, try Inside Macintosh volume IV, chapter 19, "File Manager".

Good find on the datasheet. On the first page, in the lower left quadrant, it says that the "E2" is the lot number, which we can ignore, and the "UD" is the "series", which is the specific model line of capacitors from this manufacturer. It also says that the "470" is the capacitance code and...

A quick look at the console5 site shows that that particular kit is for the logic board only, not the analog board, but that they supply analog board kits as well... but that you will need to find the appropriate kit for the specific model of analog board that you have.

Surface-mount electrolytic capacitors are round, with a square plastic base with two corners cropped (forming a rough D-shape). They are shipped in plastic packaging designed to fit on a reel (for use with "pick and place" machines) that happens to have a square recess for holding the capacitor.

There's another aspect to these air-cooled G5 systems: They always run the fans at max when the side panel is open, but if they're buttoned up then they will be a bit more dynamic about airflow management. That was a surprise to learn back in the day.

My own thought would be to conductive-epoxy the pad back down (or, if it's completely torn off and you lose it, conductive-epoxy down some copper tape), solder a bit to bridge to the existing copper, and then maybe the UV coating. That said, conductive epoxy is Not Cheap, and this doesn't look...

A sector-wise copy of the entire drive is my baseline for imaging hard drives. With a license manager in play, though, I'd be concerned about it checking manufacturer names, models, serial numbers and whatnot on the host system, any network cards, and the drive itself. If you have any...

Apparently, my iBook G4 is running Debian Wheezy (7.6) with XFCE. It was probably current when I last used the machine.

Okay, so that's the ADB power-switch (as opposed to +5v source) connection. That would prevent using ADB power buttons to turn the computer on, but I doubt that it would cause chimes of death. The iffy-looking R2 trace that I called out looks like it goes to the negative side of C7, which is one...

Looking at the bomarc IIfx schematic, R4 is on sheet 1 of 8, right next to connection point C (to sheet 2), this is part of the power-switch and ADB functionality. UB16, which I think is that black box with the wire segments poking out the top, is a dual inductor that's one of the last stages of...

On this topic, kapton tape is heat resistant. Wide pieces can be used to protect plastics and components that you don't want to accidentally melt or desolder when you're using hot air. Or tape down something to use as an air (and heat) shield. Hot air alone can be fairly indiscriminate.

My worst lifted-and-torn-pad repair, I ended up buying some two-part conductive epoxy (MG Chemicals 8331, not cheap), cutting pieces of copper tape the size of the pads that needed replacing, and using kapton tape to both help to position the replacement pads and hold them down while the epoxy...