Currently I am working on the implementations of the other FDC.
I wonder, if here is anyone who could test it on a real machine?

From Mars2000you's list:

WD1793:
- Spectravideo
MB8877A :
- Daewoo
- National
- Gradiente Expert DDPlus
- Yamaha
Microsol :
- Microsol/Brazilian MSX

The support of the Toshiba TC8566AF (used in the TurboR and other Panasonic and Sanyo machines) will follow a little bit later, as this FDC is a complete different one.

I'm sorry but I think that you should reconsider the priority again...

I think, that about 40% of current MSX users are using computer that use WD2793 that is now supported. I think that the other 40% of users use TC8566AF So the work you are planning to do next is meant only for about 20% of (active) MSX users.

Correct me, if I'm wrong... not meaning that this would be any less important...

I think NYYRIKKI is right about the numbers. Philips, Sony and Panasonic where the biggest MSX manufacturers. Only Philips and Turbo-R in my house

Ah, ok! Thanx for this numbers, I didn't know about it.
On the one side the support of this small 20% should be done very quickly, as I can use 95% of the current code.
On the other side now I see, that it's very important to support the Toshiba FDC asap, too.

I just tried the second beta (with floppy support) and I must say I'm getting more and more impressed with it by the minute! I can use all partition of my CF card now, use a 256MB FAT16 partition, copy data freely between them, use the floppy. It recognizes my NMS2850's internal 512KB memory, it even says it's an MSX2+ (must be an upgraded VDP, I bought it like this and didn't know ), 7MHz works like a charm too and really helps when playing 2 vid files at once yes I've tried the CPC Symplay and it works! Well, apart from the colors being messed up, but that was discussed earlier in this thread. But the application itselfs works like a charm! I am truely very impressed. Great work! (and keep it up )

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Ah, ok! Thanx for this numbers, I didn't know about it. On the one side the support of this small 20% should be done very quickly, as I can use 95% of the current code. On the other side now I see, that it's very important to support the Toshiba FDC asap, too.

Well, no-one of course wants to tell you what to do, but also supporting the Toshiba FDC would be a great plus, so I hope you have time for it some day. Besides, I'm pretty sure you would get a real kick out of seeing SymbOS running in R800 mode on a turboR. It should scoot along just fine... Anyhow, let us know how things work out, and if you need any more help/pointers. Good luck, and keep us posted!

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@Diederick76: Because of its CPC origin currently 576K (64K+512K) is the maximum amount of supported Ram. I am thinking about increasing it to 1MB or 2MB, but more than 2MB is not possible, as the current ram config is always stored as an 8bit value.

Right. I guess 0.5MB will be enough for now, since that's what you're apparently used to on your CPC.

But since the Dumas expansion (earlier discussed in this very thread, iirc), which will most certainly be highly popular when it becomes available, will feature a large memory expansion (I don't remember how much) and most MSX users by now probably have some kind of memory expansion already, I think that in time it would be good to support the 2MB of RAM that the current memory management of SymbOS can handle.

Dumas will have 512 KB ram

576KB should be enough in most cases, but I will support 1MB in the future for sure.

I wonder for what do people currently use such a big amount of memory? (besides ram discs)

Only to run trackmos

I have a 512 KB external mapper, which works great with SymbOS. Also, being SymbOS a multitasking OS, a good amount of memory is always welcome. Now SymbOS is being usable in our MSX and who knows, but SymbOS doesn't have now Notepad, Text Processor, Spreadsheet.. but in the future? Having one or more docs opened will require memory

SymbOS is a great step for our systems.

Yours,

Since practical things will limit the maximum supported ram to one or two MB, is it possible to use the rest to implement something like a disk cache? Don't know if it would really benefit performance much compared to IDE drives. Maybe it could be useful for other system purposes as well.

Prodatron, have a look at this and this.

MSX2, 512k, OPL4 (512k) .. that's uhm.. what some ppl do with lotsa RAM. ^_^

Also, 4 MB external ram mappers are not rare.

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Prodatron, have a look at this and this

Holy shit! This is extremely cool! I need a Moonsound and a memory mapper at once!
What music program/format did you use??
I am also very impressed how good you could compress all this video stuff into 512K!