MiSTer FPGA Forum

gornway wrote: ↑Sat Aug 22, 2020 7:44 am Bally Astrocade works except for one game: Robby Roto.

Arcade version of Astrocade should only need SDRAM for Seawolf II and Gorf (with speech) as they use it for sound samples.

if robby is not working without it I need to fix it

keep reading down the screen , there is a topic on "Books and Tutorials about verilog / HDL"

with the frame buffer now being in DDRAM, can we still use DDRAM in the core as well ?

if so, do we need to be using it in when HBLANK and/or VBLANK is 1 to avoid conflict with FB ?

basically I want to use DDRAM for samples, but would like to keep up with latest SYS if possible. (and if I leave FB out of the QSF then it does not rotate for HDMI)

I just upgraded my PC from a quad core I7 to an 8 core Ryzen 7 (both with hyperthreading) and was a bit surprised to see that it took over twice as long to build a project on the new CPU I7 used to use 4 cores (from 8) and took just under 10 minutes Ryzen 7 3700x (with 8 cores, 16 threads) took 18 minutes to build same project! however it was using...

Indeed it has - Thank you

If I try to delete PM's I get a 'The submitted form was invalid. Try submitting again.' error.

is this an Edge browser only thing, or general ?

Asteroids deluxe has a blue gel overlay, the hardware still draws vectors in white on the screen and they fade to black.

at no point are they ever any other colour, but boy are they intense when full on! (maybe the blue tinge is to try and make the full white seem more intense)

unrelated, but they really need to add a 'hobbyist' option at a reasonable price.

I have other software I have bought because they have had such a 'non profit' hobby user level

(although if someone put an opencores UART in there, then it should be OK with lite anyway)

How many cycles (max) does it take to read the DDR Ram ? looking at some cores they set the required address, set the read and then wait for read ready, but since I need to read 32 bytes per frame I would like to make sure I leave plenty of cycles to get the data I request returned. (and they won't all be in a row, it will jump about a bit) so I ca...

It is only because I needed to remind myself what the code was meant to do :) it does vary from the real schematic in a couple of places, for instance, it doesn't use wait states on video ram but uses dual port ram instead, however the game speed is controlled by the interrupt so it will not affect the game play at all. plus I didn't manage to not ...

I just added Taito's Crazy Balloon to the repository I wanted something smaller (and simpler) to do as near as damn it from scratch to get used to the framework and FPGA land in general. simple core, z80, character graphics, 1 sprite and some analogue sounds (SN74677 done as samples since the board does things to the chip not mentioned in TI's docu...

I like the fact that you can just mix them together (as long as you do it at the module level) As pointed out verilog seems to be much easier to do math in, but it seems clunkier with some of the bit manipulation (all of the 1'd0 stuff originally confused me, but think I have it sorted now) and I prefer the if then conditional stuff in VHDL basical...

After compiling, go into the Analysis & Synthesis section, and then clicki IP Cores Summary - that shows which licensed cores it needs. These will all need replacing with your own code / opencores versions for it to produce RBF with the Lite version

It uses some of the IP components that you only have full access to on the registered version (i.e. paid for)

I think it was mainly the UART, but I would have thought it would tell you in the output.

These parts would need to be replaced with open versions for it to generate the RBF on the lite version.

Of course, as well as the current option of Vertical / Horizontal it would also need a Vertical CCW option added. (or better a separate option of 'Flip' to avoid needing to change every existing core to cope with it, at least you only need to do the vertically orientated Arcade cores then) If it's an allowable feature, then I may look into how tric...

I have updated the core to the latest template and sorted the sound distortion problem, please update and try it now. voice chip using samples takes a while as I have to get the data address for each word/sample from the lookup tables (which in Gorf are all over the place - maybe in WoW they put them all in one block. Better would be to add the Vot...

I started with adding a game to an existing core (Devil Fish on galaxian core), then added quite a few bits of extra hardware to a console core to allow it to handle the arcade versions that run on it (Astrocade) and I am now writing my own core (nearly) from scratch for another arcade game (Crazy Balloon) - well, other than using Z80 code and re-p...

I see what you mean! - I'm sure it wasn't like that, so just updating to latest template and sorting it out.

will update the core in github once it is all working properly.

Most of the Astrocade based arcade games make intensive use of the vertical interrupts to do colour changes & screen updates so you cannot simply draw the screen from bottom right instead. You would have to write the entire screen to memory and then output from there instead (which is what MiSTer already does for the HDMI output) If your Dell m...