A Quick Tour of the HP-9000 712/100 NeXTSTEP Workstation (2016)

Post by ken » Wed, Mar 11, 2020, 10:19 AM UTC

bluedino wrote: post #28

Isamu wrote: post #12

Earlier quoted context omitted.

Woz worked for HP, it was his dream job as an engineer. It was a big deal for him to give up his dream job to start Apple with Jobs.

And Woz sold his HP65 calculator to get the money to start Apple. Jobs sold his VW Bug.

Post by FullyFunctional » Wed, Mar 11, 2020, 9:46 PM UTC

rasz wrote: post #51

mzs wrote: post #8

article explaining the 'Color Recovery' DSP used https://www.hpl.hp.com/hpjournal/95apr/apr95a6.pdf

3DFX used similar trick in Voodoo 3D accelerators, 24bit graphics dithered into 16bit framebuffer producing what they called "22-bit" image quality using 2x2/4x4 ordered mask https://www.vogons.org/viewtopic.php?t=36548 It was very close to Nvidia 32bit color quality while sustaining/beating Nvidia 16bit speeds, until Nvidia released GeForce card and killed competition.

Post by rasz » Thu, Mar 12, 2020, 6:23 AM UTC

FullyFunctional wrote: post #54

rasz wrote: post #51

Earlier quoted context omitted.

3DFX used similar trick in Voodoo 3D accelerators, 24bit graphics dithered into 16bit framebuffer producing what they called "22-bit" image quality using 2x2/4x4 ordered mask https://www.vogons.org/viewtopic.php?t=36548 It was very close to Nvidia 32bit color quality while sustaining/beating Nvidia 16bit speeds, until Nvidia released GeForce card and killed competition.

Based on your link (details at the bottom) it's not the same thing at all as far as I can tell. The Color Recovery buffers a scanline and does a simple edge aware filtering on a 2x16 block, for every pixel. The Voodoo 2 doesn't appear to have a buffer. Also, the HP solution takes 8 to ~ 22 bit, a harder problem.