Already been done - it's on disk 2 and looks amazing on screensydney wrote:Looking every bit as good as I thought it would! Is there any chance someone could have a go at recreating the amiga Tutankhamun image?
No need to kneelsydney wrote:Ooohh! I've just gone weak at the knees!
When my wife saw it, she said "That's better than anything you've done with your board!"simonm wrote:I might tweak that Tute image; not happy with how the dithering came out.
This is amazing. Imagine if the Beeb had been released with this kind of capability!RobC wrote:Already been done - it's on disk 2 and looks amazing on screensydney wrote:Looking every bit as good as I thought it would! Is there any chance someone could have a go at recreating the amiga Tutankhamun image?
This is from B-Em as I've lost my DVD recorder remote!
tut.jpg
As a point of reference, the Palettemate was advertised for £99 in October 1986. Assuming it replaced the original ULA, you'd recoup some of the cost.Elminster wrote:Any on ehazard a guess how much that would have added to the costs dpings it 80s style in the 80s?
here's a quick raster bars demo for NULA. It's like having an Amiga, except with out the 16-bit CPU, RAM and all the custom chips. Wow - I really need to find my DVD recorder remote so that I can make some videos of these!kieranhj wrote:Without wanting to hijack Simon's thread again here's a quick raster bars demo for NULA.
The 1986 advert says that it includes some example software but I've never seen the hardware or software. I sent an e-mail Pete Wild some time ago but didn't get a response.tricky wrote:Are there any demos from the original palettemate?Maybe I just missed them.
It depends when it was brought out, prior to VGA I suspect real RAMDACs were too expensive.RobC wrote:As a point of reference, the Palettemate was advertised for £99 in October 1986. Assuming it replaced the original ULA, you'd recoup some of the cost.Elminster wrote:Any on ehazard a guess how much that would have added to the costs dpings it 80s style in the 80s?
Had Acorn decided to do it, it would have needed a slightly larger PCB and a bigger ULA - the original ULA implementation is about 1/3 the size of the full VideoNuLA. Or they could have just put out the flash bit and used an off the shelf RAMDAC. Anyone know what a 16 x 12-bit RAMDAC cost?
)EDN, Electrical Design News - Volume 32, Issues 16-21 - Page 105 1987 - Snippet view - More editionsBecause the chip is compatible with the VGA at the register level, you can program the graphics hardware directly instead ... Although IBM uses the Inmos G171 RAMDAC on its PS/2 graphics-controller boards, you have an alternative: You can use ... The Bt478's 80-MHz frequency eliminates the flicker that some viewers have complained about in the 8514/A. The Bt471 and Bt478 each cost under $20 in OEM quantity. Brooktree Corp, 9950 Barnes Canyon Rd, San Diego, CA 92121.
This is essentially how Mike Cook's Chameleon works - some latches and three 74LS189s.dominicbeesley wrote:I was thinking about this a while back, before I decided to cheat and use a VGA RAMDAC, three 74XX189's (around £3 a pop in 1985, or 82S25 at around £2) and a couple of 8 bit latches would probably do the trick but only just, timing wise. Palette writes would have to occur during DISEN=0.
Sounds like it could have been viable around the time of the Master 128/Compact then. However, I guess the Arc was on the horizon at that point and Acorn would have wanted a clear differential between its graphics capabilities and the 8-bit machines. Also, they may well have had a stockpile of original ULAs to use up!BigEd wrote:Random price datapoint: Brooktree's responses to Inmos' G171 were reported as $20 in quantity, in 1987.
Tip top Mr Kieran - very cool. I need to up my game now.kieranhj wrote:Without wanting to hijack Simon's thread again
