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MacOSMonkey's latest activity
M
MacOSMonkey
replied to the thread
SuperMac Spectrum/24 Series III Display Artifact Issue
.
Good job. It could have been bad solder, debris or electrolytic corrosion. Unless you thoroughly clean the hole (and the pins -- to...
Apr 15, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24 Series I
.
The interposer should be helpful. Anything directly connected to a NuBus line on the board could be ESD'd from handling (buffers...
Apr 14, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24 Series I
.
Yes - there needs to be a crystal installed. There are no clock synthesizers on the early boards. Those came later. I think Spectrum/24...
Mar 12, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24 Series I
.
Cool - original Spectrum/24. Make sure the pin 1 orientation of the oscillator is correct when you are trying it and that you are using...
Mar 11, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
Seems like you're making progress. It's certainly possible that the BSR and DAC are OK. If you have identified a bad VRAM, you could...
Mar 9, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
Yes - CLUT/DAC - same. I shouldn't call it that - mostly just legacy metonymical slang. It's a DAC (that includes CLUT functionality)...
Mar 6, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
Looks like you've been busy! The reason you are seeing the common green channel is that I think it uses the green channel for up to...
Mar 4, 2024
M
MacOSMonkey
replied to the thread
SuperMac PDQ, Spectrum 8, 24, Thunder ROMs
.
@eharmon Yes - correct - more configs -- I was forgetting. Thanks. Eventually 1360x1024 and 1600x1200. The DSP board connections go all...
Feb 24, 2024
M
MacOSMonkey
replied to the thread
SuperMac PDQ, Spectrum 8, 24, Thunder ROMs
.
The V may have had more supported monitors or other hardware changes to consolidate manufacturing. And not sure if the DSP modules are...
Feb 23, 2024
M
MacOSMonkey
replied to the thread
SuperMac PDQ, Spectrum 8, 24, Thunder ROMs
.
- There was only the original Spectrum/24, then Spec/24 III and beyond. - The Thunder/24, PDQ+, Spec/24 IV and Spec/24 V use all the...
Feb 22, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
You don't have to remove the port. Just make sure there are no solder voids and test from the connector with pin jumper wires.
Feb 19, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
The RAM addressing is interleaved for speed (IIRC), which is why you see the successive banding. Also, I will just say that you are a...
Feb 19, 2024
M
MacOSMonkey
replied to the thread
SuperMac Spectrum 24/V Display Problems
.
If you wiggled the card and the problem came back, then it could be a nubus data data line (which is card, not mac, since you tried...
Feb 19, 2024
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