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Strange issue on real HW

by ARTRAG on 12-04-2015, 23:34
Score: 415.81 %, Type: Forum topic , Comments: 196 comments
of your ISR afaik (the Z80 disables them automatically). Daemos wrote: If disabling Daemos ... at the start of your ISR afaik (the Z80 disables them automatically). good point. It was an attempt ... the instruction fetch and actually does go into a low-activity state. according to my little Z80 ...

8-bit atan2

by ARTRAG on 15-05-2016, 22:48
Score: 107.18 %, Type: Forum topic , Comments: 24 comments
a 6502 routine . It seems (to me) the fastest solution ever seen on z80 to compute angles. It should ... out of topic, but as I see you always love to play with math & speedy Z80 routines, you don't ... divisions/multiplications by repeatedly calculating the midpoint of the line (=very easy in Z80 assembly), pick the right ...

50/60 Hz support for modern games

by ARTRAG on 10-01-2016, 15:38
Score: 105.82 %, Type: Forum topic , Comments: 54 comments
version. All the work for borders is on the z80 now, so the vdp has "only" to move a slice ... is somewhat wrong for me. Another thing : the MSX is NOT more powerful at 60Hz, the Z80 instructions ... is somewhat wrong for me. Another thing : the MSX is NOT more powerful at 60Hz, the Z80 instructions ...

Doom on z80

by ARTRAG on 29-10-2011, 10:39
Score: 1170.19 %, Type: Forum topic , Comments: 260 comments
the z80 in TI-83is at 6MHz, never the less.... an interesting project from the same guy ... also without gfx9000 R800 With a Turbo R it should be fine also without gfx9000 R800 > z80 ... on *z80*' thread? ;-) bottleneck here is cpu. Going for an msxdos version... P bottleneck here ...

Voice synthesis on ISR

by ARTRAG on 17-05-2016, 20:14
Score: 107.53 %, Type: Forum topic , Comments: 357 comments
the logarithmic versions of it. I wonder how expensive it would be to implement the FFT in Z80 code if you use ... wrote: I wonder how expensive it would be to implement the FFT in Z80 code if you use a logarithmic ...

screen 8 smooth horizontal scrolling

by ARTRAG on 26-02-2011, 12:57
Score: 106.53 %, Type: Forum topic , Comments: 104 comments
of the files are not loaded correctly In z80 mode some parts of the scorebar are missing.... Actually ... cycles after the sync signal. 144 VDP cycles correspond to 24 z80 cycles. Is there a way to sync ... vdp cycles (14+21 z80 cycles) ? Grauw wrote: When I’m looking Grauw wrote: When I’m ...

build your new MSX2 from scratch!

by ARTRAG on 29-12-2021, 18:01
Score: 139.5 %, Type: Forum topic , Comments: 7 comments
work by port, so... as easy as build a hat over the z80 IC and add the ANGEISA ROM on the Omega ...

3D raycasting

by ARTRAG on 21-11-2011, 23:32
Score: 98.98 %, Type: Forum topic , Comments: 160 comments
that stunt works, it will save an entire ram to vram screen copy, and further save cycles in the z80 draw ... the height and the zoom-range to 128, then the table is only 16kB). Now, the Z80 has a special ... speed is fast enough to avoid testing status bits on a 3.5mhz z80, if one use a otir or outi OK, ...

AYSFX files needed

by ARTRAG on 01-04-2014, 22:05
Score: 105.99 %, Type: Forum topic , Comments: 18 comments
Might also help ! Maggoo, well, I see that Muffie is trying to get some help from other z80 ... in background. I know z80st's work, but Shiru's one was shorter as due to the fact it does not support ...

Crystal clean PCM 8bit samples on the poor PSG

by ARTRAG on 19-02-2007, 16:37
Score: 94.92 %, Type: Forum topic , Comments: 133 comments
Problem: The “standard” solution has a very annoying problem: the z80 cannot change the 3 PSG channels ... transition. As the z80 can change a single channel at time and each channel has 16 values, the PSG can ... to be performed with The algorithm has a heavy encoding part to be performed with a PC and a light z80 player ...
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