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공지사항

'◆ My Z80 Card'에 해당되는 글 25건

  1. 2017.06.09 VDP Option board completed
  2. 2017.06.04 APMSX card being upgraded
  3. 2017.05.30 APMSX(MSX) card have TURBO 7.16Mhz speed
  4. 2017.05.21 APMSX (MSX card for APPLE IIe) is running

Hi, Friends,


Here is completed VDP Option board.


Board named as VDP-1000 Plus.

It can run SG-1000 Games and some COLECOVISION Games too.


This board can be put on the CP/M Turbo 7 card as under.

It look little strange but, practical design for neighbor card.


It can be installed as this.


The cable are from left; AV connector, APPLE II Video Input for Auto Switching and Joyport.


Watch some videos. 

Your APPLE II could play Sprite games with VDP-1000puls.


You can find ROM file here.

http://doperoms.com/roms/Sega_Sg-1000/ALL/0.html


ROM File transfer to APPLE II and can run by small loader.

Manual will be sent for buyer.


The SG-1000 Mode

 
and more games run....


The COLECOVISION Mode
and more games run.

http://quick09.tistory.com/1368




I'm waiting for PCB of joypad and then it could be a ready for sale.

Please wait some days more.


Thank you very much.

Ian Kim




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Posted by 이안김

Previous APMSX card is enough to run basic of MSX function 

but, I want some more enhanced function in it.

Now, I have new board.



What is different.

Used 144 pin CPLD as main controller.

I have more 32 IO pins now it is good enough.


I'm tring to add Konami 8K mapper and now it is working as below.

Now just support 128KB but, will extend it up to 256KB.


APMSX board have own 512KB SRAM and it support virtual slot for ROM cartridge emulation.

So I can load ROM file and can run without physical ROM cartridge. (Anyway, APMSX will have a external physical SLOT. so user still can use own cartridge)

And it accepted just 32KB ROM data but, now I can load 128KB ROM data and made it run properly.

The mapper is very different method unlike accessing APPLE II AUX memory .



I'm still having some more idea with APMSX but, I think, I should not expand too much on this board.

And It will support 256KB Konam 8K Mapper and little more? maybe.. then will be closed.


I will check the signal for External SLOT.

I've prepared for this but, have to test. 


Let's see the next what will happy with our APPLE II.
Thank you.

Ian Kim




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Posted by 이안김

MSX1 run 3.58Mhz and I've tried higher speed in my previous prototype board failed.

Due to lack of environments of signal and some others..


Now, I have a proper PCB with signal and can handle more for my purpose.

APMSX card have 512KB Fast SRAM and it is fast enough.

So, I've tried it to run 7.16Mhz and checked the status..

No, it doesn't work properly.. Screen have some broken sprites..

Maybe VDP can't follow the I/O Speed.


So, added internal turbo OFF function while accessing IO.

When I/O access happen, It added some delays then it works properly..


Tested simple speed testing program.

It takes 86 ticks on normal speed MSX but, now it just took 42 ticks.


Also faster scrolling be obtained.

Tested on GAME.

The BOSCONIAN have starting voice as 'BLAST OFF'.

Now on turbo mode, this pitch become higher..

So, it runs on faster CPU mode.


This is TWINBEE.

It runs really fast.. 



APMSX can have 3 running mode.


1. APPLE II / MSX isolated mode (Run each system at the same time)

2. APPLE II * MSX hybrid mode (Run each system at the same time)

3. Switching mode between above. but not run at the same time.

This turbo mode only work isolated mode 1 and 3(need test).


Anyway, APMSX card also can use as a Softcard for CP/M and attached devices as the same MSX. I/O address.



Thanks

Ian Kim


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Posted by 이안김

Hi friend,


I'm working on it.

Firmware task is on going..

Around 80% done and working now as the MSX computer on APPLE II.


It is installed as below


Used 3.5mm phone connector for Audio & Video output.

And applied Auto Switching..

Used PS2 keyboard signal for MSX keyboard.


This is simple joypad. It is fot the VDP option board and needed little modify to fit on APMSX.

Watch this how does it work.


It is almost the same as the prototype board.


APMSX board working as below.





Thanks

Ian Kim

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Posted by 이안김

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