SpritesMind.Net

RE: problem with wonderboy in monsterworld French version

Eke — Thu, 29 Jul 2010 16:24:57 +0200

Author: Eke
Posted: Thu Jul 29, 2010 2:24 pm (GMT 0)
Topic Replies: 13

Those schematics are excellent. Thank you, it's fun to see how it is nicely implemented.

Wonderboy in MW uses X24C01 protocol (7bits address + R/W bit + 8 bits data), and from what I've seen, picture 2 diagram seems to match regarding address/data lines decoding.

RE: 2-cell vertical scrolling + horizontal scrolling

Eke — Thu, 29 Jul 2010 15:44:14 +0200

Author: Eke
Posted: Thu Jul 29, 2010 1:44 pm (GMT 0)
Topic Replies: 24

According to the code, it does not seem 1.3.0 applied vertical scroll value to the left column when fine horizontal scrolling is used. Did you tried Gynoug on this old version as well ? If left column is disfigured in this one but not in that other game, then it's probably a bug somewhere else in current code

RE: 2-cell vertical scrolling + horizontal scrolling

fox68k — Thu, 29 Jul 2010 15:26:10 +0200

Author: fox68k
Posted: Thu Jul 29, 2010 1:26 pm (GMT 0) Subject: Re: 2-cell vertical scrolling + horizontal scrolling

Topic Replies: 24

Eke wrote:

TascoDLX wrote:

Charles MacDonald wrote:

Just curious, are you testing this with Genesis Plus? I did a lot of research to make sure the leftmost column scrolled like it does on the real hardware for 40 cell mode. But now that I think about it, I may have not tested 32-cell mode and assumed the same rules apply...

I checked. Genesis Plus works fine for Kawasaki (32-cell) but not for Gynoug (40-cell) -- partial column on the left is wrong.

Just so it's clear, Kawasaki (and presumably F1) renders one or two cell-wide columns of patterns with some vertical offset, likely based on the current scroll values (i.e., it's altering the pattern not the scroll values). I haven't seen the code yet, but it's clearly compensating for a predictable bug.

Eke, I like your theory about the unused VSRAM entries in 32-cell mode. It might be worth checking out.

Ok, just to clear up, now that I have my Everdrive MD (wonderful piece of hardware btw), I have tested those 3 games to see exactly how they behave and surprisingly, Gynoug indeed has its left column dismissed when vertical+horizontal scrolling happens.

So this means that all current emulators (well except the good old genesis plus) are wrong and that the VDP does not apply vertical scroll to the left-most column when it is partially displayed.

Hi Eke,

there is yet another game with this issue. It is Cutie Suzuki no Ringside Angel.
When a fighter falls out to the left side of ring, the first column gets misaligned. By adding the first VSRAM entry, it looks fine. However, the scrolling values (6, 12) indicate fine scrolling should be applied and therefore the entry is not used. It works fine on GPGX 1.3.0, but not on 1.4.0. I have tried the game on a japanese MD-1 and the first column is aligned.

Could you please investigate what is going on?

Thank you.

RE: problem with wonderboy in monsterworld French version

HardWareMan — Thu, 29 Jul 2010 11:08:52 +0200

Author: HardWareMan
Posted: Thu Jul 29, 2010 9:08 am (GMT 0)
Topic Replies: 13

I put this info here. So why you asking me for permission? If I did not want to disseminate this information, I would say this.

RE: Using non DIP memory

HardWareMan — Thu, 29 Jul 2010 11:03:39 +0200

Author: HardWareMan
Posted: Thu Jul 29, 2010 9:03 am (GMT 0)
Topic Replies: 8

KanedaFr wrote:

HardWareMan wrote:

What is the difference DIP or TSOP memory? There are more important parameters: volume, data bus width and access time. Is not it?

I already aware of
acces time : < 90ns (70ns)
bus width : x8(byte) or x16(word)
but what do you call "volume" ?

Capacity. Size. In russian, volume and capacity are very close things when you talk about memory.

RE: Using non DIP memory

KanedaFr — Thu, 29 Jul 2010 09:44:48 +0200

Author: KanedaFr
Posted: Thu Jul 29, 2010 7:44 am (GMT 0)
Topic Replies: 8

8bitwizard wrote:

Those are 8-bit flash chips. You will need two of them, giving you a total of 1 MByte (8 Mbit) of memory.

Of course! I plan to follow something like Devster's dual rom cart

HardWareMan wrote:

What is the difference DIP or TSOP memory? There are more important parameters: volume, data bus width and access time. Is not it?

I already aware of
acces time : < 90ns (70ns)
bus width : x8(byte) or x16(word)
but what do you call "volume" ?

RE: problem with wonderboy in monsterworld French version

KanedaFr — Thu, 29 Jul 2010 09:40:10 +0200

Author: KanedaFr
Posted: Thu Jul 29, 2010 7:40 am (GMT 0)
Topic Replies: 13

Ohh!! great info!

May I add it to my cartrige page ?

RE: Using non DIP memory

HardWareMan — Thu, 29 Jul 2010 09:37:21 +0200

Author: HardWareMan
Posted: Thu Jul 29, 2010 7:37 am (GMT 0)
Topic Replies: 8

What is the difference DIP or TSOP memory? There are more important parameters: volume, data bus width and access time. Is not it?

RE: problem with wonderboy in monsterworld French version

HardWareMan — Thu, 29 Jul 2010 09:17:11 +0200

Author: HardWareMan
Posted: Thu Jul 29, 2010 7:17 am (GMT 0)
Topic Replies: 13

Here. Take it. 1 and 2 for eeprom. You've got basic knowledge. Then, you can adjust it to your task (address and bit layout).

And one more thing: there is 24Cxx and X24Cxx (usually X24C01). They use different protocols! X24Cxx (from Xicor) use simplier I^2C protocol. You can compare it self: X24C01 and 24C01. Ring of Power use X24C01, I have been through it.

RE: Using non DIP memory

8bitwizard — Thu, 29 Jul 2010 00:01:29 +0200

Author: 8bitwizard
Posted: Wed Jul 28, 2010 10:01 pm (GMT 0)
Topic Replies: 8

Those are 8-bit flash chips. You will need two of them, giving you a total of 1 MByte (8 Mbit) of memory.

RE: Using non DIP memory

bastien — Wed, 28 Jul 2010 19:55:08 +0200

Author: bastien
Posted: Wed Jul 28, 2010 5:55 pm (GMT 0)
Topic Replies: 8

huH?
this memory has only 32 pin , sega genesis Maskrom is 40 or 42pin

RE: Port to ARM [Freeruner]

AamirM — Wed, 28 Jul 2010 17:54:37 +0200

Author: AamirM
Posted: Wed Jul 28, 2010 3:54 pm (GMT 0)
Topic Replies: 2

It is more than possible and I have been trying to get my hands on such ARM based device but without success.

You may have to wait a little.

RE: Using non DIP memory

KanedaFr — Wed, 28 Jul 2010 17:31:56 +0200

Author: KanedaFr
Posted: Wed Jul 28, 2010 3:31 pm (GMT 0)
Topic Replies: 8

Oops, just when I complain about hard to find DIP 5V flash, I finally find something interesting....

RE: problem with wonderboy in monsterworld French version

Eke — Wed, 28 Jul 2010 16:08:05 +0200

Author: Eke
Posted: Wed Jul 28, 2010 2:08 pm (GMT 0)
Topic Replies: 13

I only have limited electronic knowledge, there are certainly more capable people here than can correct you

RE: music

KanedaFr — Wed, 28 Jul 2010 13:34:49 +0200

Author: KanedaFr
Posted: Wed Jul 28, 2010 11:34 am (GMT 0)
Topic Replies: 5

FYI, I moved this topic to Blabla myself (like the other one)
After some hours, i realized it was a bot so i banned the 2 "authors"
I just forgot to locked/delete the topics