MasterOfGizmo wrote:So it could have very well ended as crap ...
MasterOfGizmo wrote:You simply shouldn't translate the phrase "MIST" at all. The german word "mist" is literally means dung but can be used much like the english crap. This was semi-intentional as i defjnitely wasn't sure the board would ever work when i started building it. So it could have very well ended as crap ...
Code: Select all
// Audio replay is supposed to run at 50Hz. Vsync is 60 Hz, so
// we generate.
reg [16:0] count_50hz;
always @(posedge cpu_clock) begin
count_50hz <= 17'd0;
if(count_50hz < 16'd159999)
count_50hz <= count_50hz + 17'd1;
count_50hz <= 17'd0;
clk50hz <= !clk50hz;
MasterOfGizmo wrote:In general i don't plan any fundamental changes. The examples are sufficient as a tutorial but they are not supposed to serve for a special purpose by themselves. So no, i don't plan to work on the video addressing or expand the memory beyond the 64 limit or the like. Actually if you want a more powerful machine you should replace the T80 with a TG68k or similar.
But i've taken a look at the audio issue. I have fixed a little bit here and there. I doesn't sound perfect yet, but imho much better than before. But i also don't intend to work on this much more. It's also a just a technical demo. It isn't supposed to be useful as a ym player.
sebdel wrote:Understood. Honestly, I think it's just the right amount of functional. I totally feel that I could make "something" out of those bits and pieces, even as a complete beginner. That being said, replacing the Z80 by a 68000 sounds a bit intimidating
MasterOfGizmo wrote:sebdel wrote:Understood. Honestly, I think it's just the right amount of functional. I totally feel that I could make "something" out of those bits and pieces, even as a complete beginner. That being said, replacing the Z80 by a 68000 sounds a bit intimidating
Replacing a CPU usually isn't that complex. But in this case you'd replace a 8 bit CPU by a 16 bit one which would affect all the other parts as well as you'd then also want 16 bit wide memory etc ...
The question is what exactly you are trying to achieve. Just play around a little bit to get a feeling for the tools and the technology? Then i'd suggest you do something funny with one of the tutorials like adding some sprites and make a small game or similar.
If you really want to build your "80's dream machine" then you need to get an idea what you want. If 32k RAM + 32k ROM is not enough then it's probably easier to migrate to a 68000 than to expand the whole tool chain to cope with some huge banked memory setup on the Z80.
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