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I don't know anything about that. The PCBs from DIYINHK are not mentioned in the air cooling links I posted. They are mentioned here: Past summer project - G5 Quad LCS rebuild LCS Issues Late 2005 Quad

I have no info regarding G5 air cooler compatibility with G5 liquid cooled CPUs. I linked some air cooling threads at #9

These are the recent ones: https://forums.macrumors.com/threads/because-i-can-air-modding-a-quad-with-pc-coolers.2427612/ https://forums.macrumors.com/threads/air-cooling-a-late-2005-g5-quad.2455900/...

There's a couple Quad G5 air cooling threads on MacRumors. They use third party air coolers - 92 mm.

MacRumors has a couple recent threads on converting a Quad G5 to air cooling.

The point of setting all the bytes in the text to all the same value is so that you can find that byte value on the bus. You're saying the VIDEO ROM is getting all the bits of the value correctly? That doesn't seem possible. Did you compare VID6 to the IOU with A9 to the VIDEO ROM? Do they match...

Here's another test program. Change the value in line 5 to any bit pattern or character you think might be helpful. 5 TEST = 255-64 10 FOR Y = 0 TO 23 20 AB = INT(Y / 8) 30 CDE = Y - AB * 8 40 OFFSET = CDE * 128 + AB * 40 50 FOR X = 0 to 39 : POKE 1024+OFFSET+X,TEST : NEXT 60 NEXT 70 POKE...

I think so. Do you mean the IOU at E5? I guess if you're done looking at all the traces to the Video ROM at F4 then sure, try the IOU chip. You said all the traces had variable signals. Did you check the voltage levels to make sure that low is low enough and high is high enough?

This is a better test: 10 HTAB 1:VTAB 1: PRINT " `Aa": PRINT PEEK(1024) " " PEEK(1025) " " PEEK(1026) " " PEEK(1027) I tested it at https://www.scullinsteel.com/apple//e The result is 160 224 193 225 which are 0xA0 0xE0 0xC1 0xE1 The problem you're trying to track down is why character 0xA0...

You can try AppleSoft Basic using the PEEK command. Something like this: 10 HTAB 1: VTAB 1:PRINT " ": PRINT PEEK(1024) 20 HTAB 1: VTAB 1:PRINT "A": PRINT PEEK(1024) https://www.calormen.com/jsbasic/reference.html

I believe the problem occurs before the PAL circuit. What does "chip base" mean? I hopes it's just a problem with a trace. Correct. You should be looking at these: Figure 8.8: Apple IIe Video ROM Text Patterns To convert blank =0xA0 to `=0xE0, bit 6 (0x40) must be stuck high. You should...

What version of Open Firmware do you have? Apple disabled automatic USB booting between April and August 2004. I think you can use a command in Open Firmware to boot USB non-automatically. https://forums.macrumors.com/threads/guide-new-method-booting-from-usb-on-powerpc-macs.2403368...

Does the VGA card actually read from RAM or does it mirror the RAM by capturing writes? Probably the latter since it would be competing with both the 6502 and the video circuitry otherwise.

The Video ROM is where the Apple II keeps the character bitmap data - the Character ROM? Which screen shot is from the VGA card and which is from the composite output? You said the VGA was OK so the screenshot on the right must be from composite. The built-in video is not getting the correct...

According to https://forums.macrumors.com/threads/question-how-powerful-of-a-graphics-card-will-work-in-a-beige-power-macintosh-g3.2303689/ in the "List of Open Firmware versions", USB was bootable when FireWire became bootable - at least since Open Firmware 3.2.4f1 02/18/00. Apple removed...

What makes a What makes an anti-static bag anti-static? Is being anti-static only a concern for bags and not boxes?

If the glue code doesn't exist, then you can check gestalt gestaltFindFolderAttr to see if FindFolder is available. The glue code is mention in https://bitsavers.org/pdf/apple/mac/developer/MPW/MPW_3.2_Toolbox_Interfaces_and_Libraries_199107.pdf That says FindFolder is in Interface.o but I...

Do the files have correct creator/type codes?

The topic of this thread is also discussed at https://68kmla.org/bb/index.php?threads/possible-to-get-the-saved-instruction-address-at-interrupt-time-in-a-time-manager-task.49705

For posix in classic Mac OS, there's the GUSI library (Grand Unified Socket Interface) https://68kmla.org/bb/index.php?threads/multi-threaded-network-app-development-on-the-68000.47084/