Practically every Unix workstation had a different solution.
Part of their performance lead was a proprietary bus that was much faster than ISA.
Technically they weren't graphics busses but since scsi and networking were built in graphics cards were the only things that mattered when it came to the higher bandwidth. A typical Sun Sparcstation would have a graphics card and maybe a serial port card or something that didn't care about the bandwidth of SBUS.
People completely forget this but from the late 80s to the mid-90s (when PCI started becoming widely available) if didn't want to shell out for a Unix workstation and you stuck a fast Radius or Supermac video card in your Macintosh II, your desktop publishing/graphics editing/visualization workflow experience was astronominfinitely better than on PC even if its 486 was faster than the 68020/68030 in your Mac. When PCI came out Apple immediately switched.
Intel probably looked at NUBUS, SBUS, and all of the others and went "well shit if we don't do something about this the pentium won't matter because video cards will be stuck on either ISA or the jank-ass VLB".
Part of their performance lead was a proprietary bus that was much faster than ISA.
Technically they weren't graphics busses but since scsi and networking were built in graphics cards were the only things that mattered when it came to the higher bandwidth. A typical Sun Sparcstation would have a graphics card and maybe a serial port card or something that didn't care about the bandwidth of SBUS.
People completely forget this but from the late 80s to the mid-90s (when PCI started becoming widely available) if didn't want to shell out for a Unix workstation and you stuck a fast Radius or Supermac video card in your Macintosh II, your desktop publishing/graphics editing/visualization workflow experience was astronominfinitely better than on PC even if its 486 was faster than the 68020/68030 in your Mac. When PCI came out Apple immediately switched.
Intel probably looked at NUBUS, SBUS, and all of the others and went "well shit if we don't do something about this the pentium won't matter because video cards will be stuck on either ISA or the jank-ass VLB".