Recent content by Coloruser

The IIfx used DMA, but AFAIK it is only used unter AU/X and not the standard Mac OS. The 1. gen PowerMac introduced DMA to the Mac OS…. (But not the PPC performas based on 68k mobo designs)

There was no public software I know of. I will check whether I still find the documentation for the CPLD that we used to program clock, bus and delay. But it may take some time. It‘s been 25 years since I worked on it.

As @trag mentioned, Hammerhead could be adjusted for bus timings and memory timings. The CPU card (JoeCARD) that I co-developed used a microcontroller to adjust multiplier, bus speed and delay. The latter means it adjusted Hammerhead‘s registers to match the requested bus speed. Other...

Right, PCI Bus (Bandit IC) and processor bus run independently and asynchronous. However, for higher bus speeds, you sometimes have to adjust bus delay. Not all CPU upgrades support that feature. In addition, lots of ram puts lots of stress or load on the memory bus. It may not be ram that fails...

Kansas used double the bus speed for the cache. Thus the cache rus at 100mhz vs. Tsunami‘s 50 Mhz. And yes, despite the FPU, the G3 was overall faster than the 604ev In real world Mac OS use.

For 60 - 66 Mhz bus speed, you needed 60 ns RAM as 70ns RAM might be too slow. I have never tried any 50ns Ram and I guess it may has not been widely used as the industry moved fast to SD RAM with 66 Mhz and above. To answer your question, the majority of tsunami testbeds were based on Umax...

Can you link to that article? As far as i remember, only the Catalyst (7200) based units - namely the PowerCenter, PowerCenter Pro, PowerCurve, PowerTower - really can run at up to 60 Mhz if the CPU runs at an even multiple of 60. However, they never worked reliably with the G3 and G4 cards...

I remember those days in the late 90s when i had dozens of TNT and Tsunami mainboards mounted on racks to test our G3/G4 cards that sported dials to adjust the bus speeds. I did experiments with them with edo and fpm and seem to remember that it was not the type but the speed that made the...

Has nobody any idea or info about those nubus cards?

Sorry for the confusion. The photos are generic. Cannot access my 475 right now to make a photo of the drive with the adapter.

I am using a 10€ 68pin to 50pin adapter from eBay in my 475 to run a seagate barracuda UW drive. Do yourseld a favor and use one with an extra Molex power socket. I decided to use an external power adapter for the HD as the power consumption was a bit high in an overclocked 475 with lots of ram...

I picked up a fully loaded IIci last week and finally had time to check its internals. Apart from the Apple 32k Cache Card and an Apple AAUI Network Card (no AAUI transceiver) there are two other Nubus cards inside. Miro Prisma 2.1 - Graphics card. I don´t exactly know about resolutions and...

Well, as mentioned above, the card is OHCI compliant. Without USB Card Support 1.4.1, the System Profiler only lists the card as three PCI Devices. With USB Card Support, the profiler shows 2 PCI USB Cards and 1 PCI Device. After applying the patch from @Phipli the Profiler shows the same, but...

Plus, defunct IIsi and 14" RGB Display, Performa 475 with full 040 and 14" RGB Display, Power Macintosh 5500/225, iMac G3/500 FW, iMac G4 17", Power Macintosh MDD 1.25, MacBook and MacBook Pro with Core2Duo, iMac 5k & MacBook Pro 13"

HI, I´ve got a NEC 5 Port USB 2 card donated some time ago and thought, I would give it a try in my 5500. Unfortunately, 9.0.4 includes the drivers, but doesn't seem to recognise the card. Strangely, with the card installed, system profiler shows me three unknown PCI devices. Without the card...