On Wed, 25 Aug 1999 21:32:57 +0200, Laurens Holst wrote:
>Then you do something wrong accessing the VDP.
>Dos has NOTHING to do with VDP access...
Well, when you need SubROM calls, yes, there is a problem.
>But anyways, I'll stick to Dos, more easy to me, full functionality and I
>know how to work with/program it. Uzix is nice but still in beta stage, too
>limited memory, and I absolutely know NOTHING about Unix.
Well... In a near future I'll try to program for UZIX. It's seem promising.
As it is MultiTask (preemptive!!!), the only changes on programing are:
DO NOT change mapper pages and... Avoid disabling interrupts. If
you do, turn it on as fast as possible, or you'll disable the multitask! (-:
>> Well... Implementing this would be possible to make a MSXDOS2 taskswitch
>> version without many problems. This is important on a taskswitch, not only
>> on multitask.
>But that wasn't what the developers had in mind...
Sadly.
>> I tryed, but it doesn't work. Try yourself!
>Too much work and I see no real use (at least not for my current system).
>(current system: MSX2(+), SCSI + 2xHD (80/60MB), 2MB MemMap, MoonSound)
My current system is almost like yours.
-MSX2+ CIEL 7Mhz with 4Mb of Mapped RAM, FM, 3.5" 720Kb drive and HD of 1Gb.
-MegaSCSI with 512Kb of RAM
- MegaRam 256Kb + SCC
- PAC Cartridge
- Monitor RGB 14" with stereo sound
- 3D LCD Glasses
And they are comming
- MSX Audio
- MoonSound
But It still usefull. Tere is LOTS of games that doesn't run under BDOS2.
>> DOS1 program.name
>> And the loader would change the BDOS version and load the program into
>memory, and run as BDOS2 never was present. If it was a simple task, there would
>be a program to do this already.
>Well there already is MAP.COM (never didn't work),
I have and disassembled MAP.COM (which is available disassembled into
my page), but this is only ONE problem. The problem IS NOT memory mapping.
There is other problems.
>and further I think you
>should just make sure to have cleared all hooks Dos sets... But err... All
>Dos2 routines are Dos1-compatible!!!
But DOS2 uses LOTS of more system vars, that are almost always covered
by programs made for DOS1! THIS is one BIG problem.
>The only thing you must keep in account
>is the memorymapping I think... As long as the Dos-kernel in the last 2
>pages isn't overwritten...
With Mapper.com you can disable this.
>Solution for some programs might be to use the smallest mapper for the Dos
>kernel and set the other mapper as the TPA, for the programs...
I have 4Mb in a single Mapper. I'm tring to create a unique solution.
And it's not very simple.
>Don't know if it will work but it's worth a try.
I'll try add this, if I can get the Padial 1Mb expansion Working... But If
I can switch to DOS1, Memory Mapper will be no problem.
>> Well... Z280 is discontinued at this time. Z80 and Z38x are the only
>> processors available from Zilog. Now it's too late to cry... )-:
>Z380 is still available by the way? I heard some rumour it couldn't be
>acquired anymore...
AFAIK (and Zilog said it to me about 3 or 4 months ago), z380 is still
available and Zilog has no plans on stop the production.
[]'s Daniel Caetano ([EMAIL PROTECTED])
...All "Torre de Pizza" structure were calculated under Windows.
OS/2 Sites: http://www.os2brasil.com.br/novidades/
http://www.os2brasil.com.br/novidades/drivers.shtml
http://www.geocities.com/SiliconValley/8752/os2hp/index.html
MSX Sites: http://www.fudeba.cjb.net/ e http://www.msxnews.cjb.net/
MSX Phoenix: http://www.msxphoenix.cjb.net/
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