Welcome, Guest. Please login or register.


Author Topic: ZX Spectrum Emulator Card (Read 79587 times)

Offline Zozosoft

  • Global Moderator
  • EP addict
  • *
  • Posts: 14721
  • Country: hu
    • http://enterprise.iko.hu/
Re: ZX Spectrum Emulator Card
« Reply #60 on: 2015.May.06. 16:19:05 »
Will be probably needed on board AY-3-8912 (?)
Yes it is will make the emulation more easy :-)

Quote
Dave is too much different.
Yes, but exist a AY emulatioun routines. Not everything can be emulated, but at most of time are usable solution.
For example this used in my PT3 Player. Try it :-)

Offline pear

  • EP lover
  • *
  • Posts: 825
  • Country: pl
  • Z80 only
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #61 on: 2015.May.06. 18:42:12 »
This is an emulation of AY for CPC, or for the ZX ?
In each of these computers is another clock frequency for AY and you can not easily transfer music between these platforms.

Offline geco

  • EP addict
  • *
  • Posts: 7081
  • Country: hu
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #62 on: 2015.May.06. 19:02:17 »
This is an emulation of AY for CPC, or for the ZX ?
In each of these computers is another clock frequency for AY and you can not easily transfer music between these platforms.
As I remember PT3 Player is for ZX, but the code do not change too much for CPC either.

Offline pear

  • EP lover
  • *
  • Posts: 825
  • Country: pl
  • Z80 only
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #63 on: 2015.May.06. 19:06:42 »
It's not about code (very similar) but only sound parameters.
And another question: Are the outputs of the AY can be connected to the inputs Audio In Enterprise ?
What should be the voltage levels at these inputs (or I need to measure it myself)?

Offline Bagpuss22

  • EP fan
  • *
  • Posts: 167
  • Country: gb
Re: ZX Spectrum Emulator Card
« Reply #64 on: 2015.May.07. 21:14:28 »
Zozo, 

The v4.1 rom used on this spectrum emulator, is
there a version with English menus etc?  Just
wondered as it might help me a little. Lol.

Russ

Offline Zozosoft

  • Global Moderator
  • EP addict
  • *
  • Posts: 14721
  • Country: hu
    • http://enterprise.iko.hu/
Re: ZX Spectrum Emulator Card
« Reply #65 on: 2015.May.09. 22:51:51 »
The v4.1 rom used on this spectrum emulator, is
there a version with English menus etc?
Currently no :oops: but will do it!

Offline gflorez

  • EP addict
  • *
  • Posts: 3607
  • Country: es
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #66 on: 2015.May.09. 23:24:27 »
I can do a Spanish version of the menus if you give me texts.

Offline szipucsu

  • Global Moderator
  • EP addict
  • *
  • Posts: 9898
  • Country: hu
    • Támogató Támogató
    • Webnyelv.hu - Tanuljunk nyelveket!
Re: ZX Spectrum Emulator Card
« Reply #67 on: 2015.May.10. 11:44:29 »
Currently no :oops: but will do it!
You can put the Hungarian words here, or in the Hungarian forum to translate them into English together.
100 SOUND SOURCE 2,STYLE 128,PITCH 25.2,SYNC 1
110 SOUND PITCH 25,SYNC 1
120 ! Videos

Offline pear

  • EP lover
  • *
  • Posts: 825
  • Country: pl
  • Z80 only
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #68 on: 2015.May.10. 14:02:09 »
I can do a Spanish version of the menus if you give me texts.
And I can do a Polish version :)

Offline szipucsu

  • Global Moderator
  • EP addict
  • *
  • Posts: 9898
  • Country: hu
    • Támogató Támogató
    • Webnyelv.hu - Tanuljunk nyelveket!
Re: ZX Spectrum Emulator Card
« Reply #69 on: 2015.May.10. 14:54:35 »
And I can do a Polish version :)
You could have problems with some letters on the Enterprise, e.g. ą, ę, ł :D
100 SOUND SOURCE 2,STYLE 128,PITCH 25.2,SYNC 1
110 SOUND PITCH 25,SYNC 1
120 ! Videos

Offline pear

  • EP lover
  • *
  • Posts: 825
  • Country: pl
  • Z80 only
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #70 on: 2015.May.10. 15:15:25 »
So there will be no "tails" ;)

Offline lgb

  • EP addict
  • *
  • Posts: 3563
  • Country: hu
  • æðsta yfirmaður
    • http://lgb.hu/
Re: ZX Spectrum Emulator Card
« Reply #71 on: 2015.May.10. 16:14:28 »
So there will be no "tails" ;)

Well, I use letters without the "extra decoration" even in my mother language, Hungarian, so almost never write correctly on computer :-P

Offline Bagpuss22

  • EP fan
  • *
  • Posts: 167
  • Country: gb
Re: ZX Spectrum Emulator Card
« Reply #72 on: 2015.May.10. 23:44:05 »
Currently no :oops: but will do it!


Zozo, your a star! :bow:

Offline gflorez

  • EP addict
  • *
  • Posts: 3607
  • Country: es
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #73 on: 2015.May.17. 01:02:55 »
I've just finished my ugly flexybridge- It works but I must put some Spectrum games in the SD tomorrow to test it fully.

More than 70 weldings... by two.
« Last Edit: 2015.May.17. 01:06:01 by gflorez »

Offline gflorez

  • EP addict
  • *
  • Posts: 3607
  • Country: es
    • Támogató Támogató
Re: ZX Spectrum Emulator Card
« Reply #74 on: 2015.December.23. 13:40:37 »
I've been thinking....

Can be Enterprise Z80 ports be greater than 255?

AY chips on the Spectrum use ports 65533 and 49149(1111111111111101b and 1011111111111101b, or FFFDh and BFFDh).

As you can see, the difference is only on the 14th bit, but on LGB's ports list it is said:"full 16 bit is impossible since the highest two bits are "messed up" by Dave".

I say this because interfacing an AY chip to a Spectrum 48k or Timex seems to be "fairly easy" and compatible with a long list of existing games. And, what about putting it on an Enterprise? AY chips had been used on a variety of 8 and 16 bit computers, also widely on arcade machines.

We even doesn't need a real AY chip, as they are scarcer by time passes. On the AY wiki they  say:

"A VHDL equivalent description has been written, for use in FPGA recreations of arcade machines and others like those mentioned above. The VHDL source code is available on the Internet, and compiles to fill about 10% of a Xilinx XC2S300 FPGA"

On the other side, this can be the fist step to develop a 128K Spectrum emulator card... but not limited to that as there are a huge amount of AY songs out there waiting to be played. One of the incompatibilities the EP has with SymbOS is the lack of that chip.

And the EP doesn't need a mixer or external amplifier as its expansion port has two unused audio input pins that can be used to mix the AY sound with the internal DAVE one.

May be adding it to the "All in one interface"?

I only was dreaming.