Recent content by Jamieson

With the oscillator socket empty I'm unable to get into a custom setup screens. This is with SuperVideo 2.7.5 Tried multiple combinations of Option keys, etc. I do the see the developer list though. With the oscillator socket populated (I think I used 50MHz just because that's what I had around)...

I picked up a SPARCstation IPX recently. Where can I find more info about your SBUS FPGA project?

Very cool, nice to see my OrangePC card has gone to a good home!

Thanks got it working, I'm using the 3.8.2 software found here It cold boots into a window on the Mac desktop.

Could anyone point me to drivers or install software that would work with this card? I tried a few "Orange386" floppy images but the installer didn't see any card. TattleTech finds the card on the NuBus slot through.

I bought a Supermac Spectrum/24 III on Buyee around the same time, might have even been from the same seller. It arrived with one of the small through hole tantalum caps cracked and broken. I removed it and soldered in a new surface mount tantalum cap in it's place before installing the card in...

What OS version are you running? When connected to a monitor does the monitor sync up at all, even if the machine hangs? Do you have the SuperMac software installed?

Thanks for the good info on the details on that the Brooktree DAC part. Interesting wire mod on your board with the HSYNC and VSYNC pins. Thankfully my monitor is OK with the composite sync pulse driven on the HSYNC line. The LCD monitor I'm using doesn't like the sync pulses added to the video...

In SuperVideo 2.7.5 with a Spectrum/24 III there are only four monitors shown: SuperMac High-Res RGB @ 60Hz, SuperMac High-Res @ 75Hz, Apple RGB, and NTSC RGB. No mention of a PAL monitor, or Apple 15" portrait display. Maybe these options do appear in the list when the appropriate oscillator is...

Using a PLL to step the NuBus clock might work OK as long as the NuBus clock is constant 10MHz. If for some reason it disappears or changes frequency the FPGA PLL could get into a bad state. In this example it's OK to run the local fast clock asynchronous to the NuBus clock. Say if the local...

On my setup I show three oscillators present (30.24, 64, 80) but the line about Double-Click here is not present. If I double click on any of those items nothing happens. I'll try adding an oscillator to the empty slot and see if that "unlocks" anything. I was able to find the "Spectrum/8...

Very cool, thanks! I'll make my way over to the antique chip programmer at work and get it done. What is the size of this EPROM chip?

Registering the NuBus signals and oversampling with a fast local clock is a good technique for eliminating one clock domain crossing, which is always nasty business. It's cool to see the benchmark numbers increasing! Do you think if some of the acceleration routines like rectfill and bitblit...

I'll check my Classic II power rails, I suspect they are doing the same thing, but on the timescale of about 30 seconds. I can hear the fan slowly increase speed at powerup so I know the 12V rail is doing something similar. Maybe one thing to try, to see if it is thermal related, is heat up a...

How (or where) are the custom monitor profiles being defined? I have SuperVideo 2.7.5 installed and it works with my Spectrum/24 III card, but I don't see where to enter the custom monitor types. Curious to see if the card could be made to support 1280x1024, even if in 4 bit mode. Using the...