How to set switch settings for 800x600 resolution on PowerPC 7600 with a 10-pin adapter?

I have a PowerPc 7600 running OS 8.6 connected to a HP. 1907 monitor.


I’m using a 10 pin dip switch DB15 to VGA adapter. I don’t know the make or model of the adapter. Can anyone tell me what the switch settings need to be for 800x600 resolution?


Thanks!


[Re-Titled by Moderator]

Original Title: PowerPC video adapter

Posted on Dec 1, 2025 4:55 PM

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7 replies

Dec 2, 2025 10:26 AM in response to beigebox

Probably not, at least without knowing the make and model of the adapter you're using.


Many vendors sold these devices back in the day. I don't think there's a single, universal setup, so you'd need to know which model you're using to have any chance of a direct answer.


Then, there's the alternative - try different combinations to see which one(s) work. :)

Dec 2, 2025 1:41 PM in response to beigebox

Thank you. I decided to go back to a pci adapter card which solved the problem.


On another note, this Powerpc with OS 8.6 is showing the wrong day of the week in the menu bar. The current date and time are correct as well as the time zone. Today is Tuesday but it shows Wednesday! Fresh PRAM battery,zapped PRAM, reset PMU and trashed date and time prefs.


Any ideas? This one has me stumped

Dec 2, 2025 2:59 PM in response to HWTech

👍


I recently stumbled upon that site while researching a solution for printing to a StyleWriter from a recent Mac. While I did not solve that problem directly (apparently its OP grew disinterested) it led to solving other, completely unrelated ones.


In fact the workaround I had been using for old printers required commensurately old Macs running as overpriced print servers... a workaround that was growing increasingly ugly with the passage of time. That old Mac has now been repurposed as a Linux Mint workstation, thanks to your repeated recommendations of it. It had been using an older Ubuntu distro. Mint has come a long way since then. That antiquated Mac now has a new lease on life.


Along the way I started implementing a migration from the now-obsolete Time Capsules to insanely cheap Raspberry Pi based NAS devices. Two months in and it's working perfectly, and faster than the TCs they will eventually replace.


It's a case study in how researching solutions to old problems can lead to solutions for new problems.

Dec 2, 2025 6:40 PM in response to John Galt

John Galt wrote:

👍

I recently stumbled upon that site while researching a solution for printing to a StyleWriter from a recent Mac. While I did not solve that problem directly (apparently its OP grew disinterested) it led to solving other, completely unrelated ones.

I was watching that thread. Very interesting. I was rooting for you there. If I actually had the time I may have joined in with you to try & make it work as those sort of puzzles interest me. I don't have the StyleWriter, but I did have its non-Apple twin with the standard serial/parallel port configuration (don't recall the brand at the moment).


In fact the workaround I had been using for old printers required commensurately old Macs running as overpriced print servers... a workaround that was growing increasingly ugly with the passage of time. That old Mac has now been repurposed as a Linux Mint workstation, thanks to your repeated recommendations of it. It had been using an older Ubuntu distro. Mint has come a long way since then. That antiquated Mac now has a new lease on life.

I recommend Linux Mint because it is a very easy to use distribution for people unfamiliar with Linux and a co-worker has used it for years on old Macs to give to the less fortunate (the co-worker was not a Linux guru....I had given a demonstration on it years ago for testing & accessing data when macOS could not boot). The fact that co-worker had no issues setting up older Macs without issue is why I recommend it. The default Ubuntu desktop environment is not able to run on older resource limited systems and it has just gotten worse with all the containers it is using these days. Linux Mint keeps things simpler & doesn't strain the resources of older systems.


However, if someone is familiar with Linux, then using Debian may be a better option since it performs better & is more stable than Ubuntu (learned that with one of the early versions of Ubuntu). The most difficult part of Debian is installing & configuring everything, but once setup it is easy to maintain & upgrade to newer major versions as long as the installation doesn't use much software outside of the Debian repositories. I actually prefer the KDE desktop these days even on older resource limited systems.


Along the way I started implementing a migration from the now-obsolete Time Capsules to insanely cheap Raspberry Pi based NAS devices. Two months in and it's working perfectly, and faster than the TCs they will eventually replace.

It's a case study in how researching solutions to old problems can lead to solutions for new problems.

I find that happens a lot. It is amazing how much you can learn when researching to solve a puzzle or problem. I sometimes get lost in it trying to absorb the knowledge freely given by others. Curiosity is both a blessing and a curse.

How to set switch settings for 800x600 resolution on PowerPC 7600 with a 10-pin adapter?

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