Personal LaserWriter 300 doesn't work with G3 upgrade on PM 9500

[feeef]

Hi,
I have a Personal LaserWriter 300 that works perfectly with my PM 9500 when using its original PPC 604 processor. However, when I replace the CPU card with a PowerLogix G3 500MHz upgrade, the computer cannot communicate with the printer anymore.

I have the same issue with a Sonnet G4 upgrade but this time, printing works when I disable the Sonnet extension that enables backside cache.

I think that this printer doesn't have its own CPU and uses the computer's CPU. Therfeore, I was wondering if this was a known issue from those upgrades manufacturers and if there was a work around?
Thank you!

 

[Phipli]

Hi,
I have a Personal LaserWriter 300 that works perfectly with my PM 9500 when using its original PPC 604 processor. However, when I replace the CPU card with a PowerLogix G3 500MHz upgrade, the computer cannot communicate with the printer anymore.

I have the same issue with a Sonnet G4 upgrade but this time, printing works when I disable the Sonnet extension that enables backside cache.

I think that this printer doesn't have its own CPU and uses the computer's CPU. Therfeore, I was wondering if this was a known issue from those upgrades manufacturers and if there was a work around?
Thank you!

Try using the CPU Director drivers from PowerLogix, and turn off Speculative Addressing? That might help.

 

[feeef]

Thank you very much for your reply @Phipli ! Speculative addressing was already off so it didn't help. However, temporarily disabling the backside cache through the same control panel did the trick!

It is a bit annoying to do so when I want to print but at least, I know I can keep my upgrade card and still use the printer, which is awesome!

Thank you again Phipli!

 

[Phipli]

Thank you very much for your reply @Phipli ! Speculative addressing was already off so it didn't help. However, temporarily disabling the backside cache through the same control panel did the trick!

It is a bit annoying to do so when I want to print but at least, I know I can keep my upgrade card and still use the printer, which is awesome!

Thank you again Phipli!

Thats a handy way of solving it.

I suspect it isn't the cache causing the issue, but just that disabling the cache massively slows the computer down (it seriously reduces the benchmark processor score by something like half, if not more).

It sounds like something was running too fast for the printer.

Remember to turn it back on when you're done!