Minimig Discussion Forum

Discussing the Open Source FPGA Amiga Project
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 Post subject: Re: Sega Master System
PostPosted: Mon Aug 27, 2012 7:10 am 
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Joined: Fri Dec 09, 2011 11:31 am
Posts: 91
Hi l@k,
I tried your version of SMS emulator, specifically game Psycho Fox and Marble Madness.
Both games work but a damaged graphics.
I did a photo to see the difference between your (8KB RAM) and my (4KB RAM) version.

your
Attachment:
sms_lak.png
sms_lak.png [ 100.28 KiB | Viewed 2825 times ]


mine
Attachment:
sms_minimig_emu.png
sms_minimig_emu.png [ 86.98 KiB | Viewed 2825 times ]


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 Post subject: Re: Sega Master System
PostPosted: Fri Aug 31, 2012 10:14 pm 
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Joined: Fri Dec 09, 2011 11:31 am
Posts: 91
Thus, the colors on SMS are fine. A few more tests and if it is OK to upload it to the site on Sunday.

Attachment:
SMS_screen.png
SMS_screen.png [ 340.13 KiB | Viewed 2787 times ]


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 Post subject: Re: Sega Master System
PostPosted: Sat Sep 01, 2012 12:19 am 
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Joined: Mon Dec 07, 2009 3:53 pm
Posts: 26
@minimig_emu
Nice... colors indeed.


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 Post subject: Re: Sega Master System
PostPosted: Sat Sep 01, 2012 9:28 pm 
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Joined: Fri Dec 09, 2011 11:31 am
Posts: 91
I found a functional ROM files :). Even works Alladin game rom 512 kilobytes 'hurray' has only a small graphical errors, but we can play.

some screens :)

Attachment:
sms_screen_new.png
sms_screen_new.png [ 776.57 KiB | Viewed 2770 times ]


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 Post subject: Re: Sega Master System
PostPosted: Mon Sep 03, 2012 4:17 am 
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Joined: Fri Dec 09, 2011 11:31 am
Posts: 91
Here is the latest version. I did some tests, something works and something no, but it is set the quality of the emulator. I also recommend to shorten the file names on the card to eight characters, or at least remove the spaces in the name.

The SD card I once again set to 3.3V VCC pin 6th. Since 3.3V is maximum for miniSD and microSD.

Have a lot of fun ....

Attachment:
SegaMasterSystem.zip [1.57 MiB]
Downloaded 220 times


connection
Code:
NET "spi_cs_n"     LOC="P172" |IOSTANDARD = LVCMOS33 ;        # JOY1 pin 1 to SD_CARD (SS Chip_selected)  pin 1
NET "spi_di"       LOC="P171" |IOSTANDARD = LVCMOS33 ;        # JOY1 pin 2 to SD_CARD (MOSI)              pin 2
NET "spi_sclk"     LOC="P169" |IOSTANDARD = LVCMOS33 ;        # JOY1 pin 3 to SD_CARD (SCK)               pin 5
NET "spi_do"       LOC="P167" |IOSTANDARD = LVCMOS33 ;        # JOY1 pin 4 to SD_CARD (MISO)              pin 7
NET "spi_33v"      LOC="P168" |IOSTANDARD = LVCMOS33 ;        # JOY1 pin 6 to SD_CARD (VCC 3.3V)          pin 4


Attachment:
SD2JOY_up.png
SD2JOY_up.png [ 10.13 KiB | Viewed 2681 times ]


Last edited by minimig_emu on Wed Sep 05, 2012 7:26 pm, edited 2 times in total.

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 Post subject: Re: Sega Master System
PostPosted: Mon Sep 03, 2012 3:06 pm 
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Joined: Wed May 27, 2009 10:51 pm
Posts: 478
Great work !!!

Master-System has lots of good games. I never had a real Master-System console, but i often played some games of it, with Emulators on the PC, like "Kega Fusion", "Gens Plus" or "Freeze SMS". Since i have my Everdrive-MD, i can also play them on the Mega-Drive, because the Everdrive-MD offers Master-System compatibility to the Mega-Drive, which is great.

The Master-System had the best graphics from all 8-bit systems, because of the 32-colors that it can show at once (other 8-bit systems only 16). many games looks close to 16-bit games.


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 Post subject: Re: Sega Master System
PostPosted: Mon Sep 03, 2012 3:13 pm 
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Joined: Thu Jun 18, 2009 9:54 am
Posts: 349
Ow, awesome!!!
Master System on the Minimig is something I'd LOVE to play with, but... would it be impossible to read the ROMS from the normal sd-card slot on the Minimig? No way around this?
Having to attach a sd card reader to a joystick port is... well, strange.


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 Post subject: Re: Sega Master System
PostPosted: Tue Sep 04, 2012 10:48 am 
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Joined: Mon Dec 01, 2008 9:58 pm
Posts: 1566
Location: .de
Very nice! Thank you for the work and Schematics to connect a sd-card to the Minimig board :)
I will try this as soon as possible. Its amazing how many games is playable now :)

Using the actually sd-card slot on Minimig board will require an alternative/adapted PIC or ARM firmware too. Currently the PIC/ARM only "speak" Amiga alike and act on the steps requested by the FPGA core and its internal 68k-code bootloader (the blue screen with text print).
To make use of the slot, a totally new firmware need to be written and flashed into the MCUs.
In general this is no problem but it would require a re-flash each time you want to use the board as an Amiga or Master-System or any other alternative core with SD-card access.

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JMP $00000BED ; will guru-meditation until next morning


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 Post subject: Re: Sega Master System
PostPosted: Tue Sep 04, 2012 11:21 am 
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Joined: Fri Dec 09, 2011 11:31 am
Posts: 91
boing4000 wrote:
I will try this as soon as possible. Its amazing how many games is playable now :)


I tried about 50 games and 40 games worked. Maybe luck :D


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 Post subject: Re: Sega Master System
PostPosted: Tue Sep 04, 2012 11:54 am 
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Joined: Thu Jun 18, 2009 9:54 am
Posts: 349
ok, understood!
And what about the Joyport1 using? I mean: Is Joy2 used as Master System joy1 then?
Or is game input unavailable? Why not using joyport2 for SD instead?


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