Search found 30 matches

by rogerjowett
Thu Aug 08, 2019 8:35 pm
Forum: Introduce yourself
Topic: ULA+ supported ?
Replies: 1
Views: 202

ULA+ supported ?

is the ula+ supported on the next?
by rogerjowett
Fri May 03, 2019 5:04 pm
Forum: Introduce yourself
Topic: zx spectrum next
Replies: 29
Views: 3302

Re: zx spectrum next

24576x2 = 49152 x 2 = 98304 x50 = 4915200 4.9mhz DMA wins!
by rogerjowett
Fri May 03, 2019 5:03 pm
Forum: Introduce yourself
Topic: zx spectrum next
Replies: 29
Views: 3302

Re: zx spectrum next

2tstates per byte 4915200 tstates someone needs to get rid of video ram contention surely?
by rogerjowett
Fri May 03, 2019 4:32 pm
Forum: Introduce yourself
Topic: zx spectrum next
Replies: 29
Views: 3302

Re: zx spectrum next

24576bytes x 16 = 393,216‬ x50 = 19,660,800‬ 19.6MHz required dMA reads port to ram in 2 tstates
by rogerjowett
Fri May 03, 2019 4:06 pm
Forum: Introduce yourself
Topic: zx spectrum next
Replies: 29
Views: 3302

Re: zx spectrum next

so lets get this straight the dma cannot read data from the sd memory card as doing this takes 16 tstates even at 14mhz - which is really only 10mhz - and you have the nerve to show a 2d image of castle wolfenstein 3d on one of the youtube videos be a bit more honest please?
by rogerjowett
Thu May 02, 2019 5:39 pm
Forum: ZX Spectrum (and Clones)
Topic: zx spectrum next
Replies: 8
Views: 889

Re: zx spectrum next

11. byte delight has a hdmi interface that uses a raspberry pie as the hdmi output source what a pity it cant be used as a parallel processor for zx spectrum with its gpu it must be able to handle 1080p graphics no?
by rogerjowett
Thu May 02, 2019 5:38 pm
Forum: ZX Spectrum (and Clones)
Topic: zx spectrum next
Replies: 8
Views: 889

Re: zx spectrum next

9. velesoft tried to communicate with him after driving to prague but he couldn't be bothered to communicate with me pity would have loved to buy a few datagear DMA for the sam coupe or zx spectrum 10. mb-02+ hi density - but not extended density as yet but has DMA and therefore multitech screen$ wh...
by rogerjowett
Thu May 02, 2019 5:30 pm
Forum: ZX Spectrum (and Clones)
Topic: zx spectrum next
Replies: 8
Views: 889

Re: zx spectrum next

7. even the spectranet - which doesn't have an sd card reader or even a compact flash one can stream 6kb per frame - we would seriously need to more than double/ quadruple - then multiply by a factor of eight this speed for fullscreen animation on the next - making the machine unable to dfo this mea...
by rogerjowett
Thu May 02, 2019 5:24 pm
Forum: ZX Spectrum (and Clones)
Topic: zx spectrum next
Replies: 8
Views: 889

Re: zx spectrum next

5. interlaced graphics form our old adversary velesoft who has a facebook page dedicated to using this technique but so far no software conversions as yet be nice to see next using interlaced mode though that would need two sets of 48kb of video ram so the dma would be rather busy shifting all that ...
by rogerjowett
Thu May 02, 2019 5:19 pm
Forum: ZX Spectrum (and Clones)
Topic: zx spectrum next
Replies: 8
Views: 889

Re: zx spectrum next

3. the prism link is another interesting zx spectrum hardware link that has maybe 56mhz and audio capabilities but for some god forsaken reason only 32kb of video ram daft no if it had 64kb it could do interlaced graphics double the vertical resolution be nice if the next had an extra 48kb of video ...