SpritesMind.Net

Indeed. Print this pics to A4 paper and all looks just fine. And yes, F3 (Ctrl+F) doesn't work with it, that's pity. Poor new generation. I think that you are attempting a Quip there - more fool you. The Aim should always be to improve our standing and thus make it possible for us all to move forwa...

One can always invest the time to make a "prorper" schematic, but I guess the mindset is that it takes a lot longer to referenge the images for 15 seconds and find what you want, and later 1 second references with software arent wort the time to get that far. At least that is how I feel. Yes, this ...

I find those 2 files very usable too, all letters can be read and all lines traced easily... Indeed they can be read. However they cannot be searched and do not benefit from being in a Format useful to a modern piece of Schematic Software. I suppose this comes down to People favouring a manual Appr...

Hello all, firstly, apologies if this has been asked (I couldn't find it though). Secondly: Has anyone created a Schematic of the Original Megadrive #1 (the one with the External Port on the Back) that could be read using some form of modern Schematic Viewer/Creation Application? If it runs under an...

Sometimes it's the littlest things that get us. I've done similar things in the past... and you're so close to the problem that you can't see it. You read it the way you MEANT to write it instead of how it's actually written. That's why it's good to have someone else take a quick look when you run ...

Did you mean to do this instead? move.l #0x88BEEF99, (a0)+ move.l #0x11BEEF22, (a0)+ move.l #0x44BEEF55, (a0) Without the '#', you are moving from an address... the first being odd which immediately throws an odd address error on real hardware... in an emulator, it will probably work, but copy from...

Hello all, I am doing some tests in order to write to all of the Megadrive's Memory such as VRAM, VSRAM, CRAM, etc. I have tried to write to Work-RAM using the Routine below. MESS will write to the 68K's Work-RAM but will then bypass the next instructions and execute the Halt (coloured in Red). I wo...

Perhaps... be sure to cycle count your code. Sometimes people forget just how many cycles the 68000 uses for things - 8 to 10 cycles for a single instruction is not extreme... in fact, instructions are more likely to be 8 to 10 cycles than to be 4 to 6. :D Indeed. Most of the work I have done over ...

Depends on how large the values are and how fast you wish the code to go. The standard divide on the 68000 gives both the quotient and remainder. So if a 16 bit remainder is sufficient, the regular DIVS/DIVU gives the mod in one operation in somewhere around 150 cycles. Many Thanks, Chilly Willy. A...

Hello all, this is a general M68K Question: I wonder how efficiently it is to implement the familiar Mod/Modular Arithmetic Operation in 68K. I am thinking for my own Problem it might be better not to use a Mod Arithmetic Operation and just calculate the n-Multiples that I need over the Range, then ...

This looks very useful indeed. The ability to single step the Megadrive Code without hardware support is going to make things a lot easier to develop

GManiac, many thanks for providing this disassembly.

I am very sorry in replying to this Thread so late. I started a job in another Country so I have had a lot on the go since then.

This is extremely helpful and I thank you once again.

Many thanks for the guidance Chilly.

I remember learning C many many years ago under Borland Turbo C but never did any Graphic programming under DOS, I had an Amiga for graphics

I am looking into DOS Character Mode programming now...

Thanks!

Hello,

I do not understand the Megadrive's map format.
could some one direct me to a source of information that I can use or perhaps offer a quick explanation/example please?

Failing that does anyone know which Megadrive Emulator has available sourcecode?

Thanks.

GManiac, is there any chance you could generate a disassbmly of musha aleste, tatsujin or kuuga for me please?

Thanks