> 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.
Ah, yes, indeed. SubROM can't be called from Dos-environment...
But SubROM is slow and hardly useful.
Just use direct VDP access.
> >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!
(-:
Hmmm... well I most of the time REPLACE the interrupt so I don't think Uzix
programming is something for me.
> >> 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.
Don't know. Dos is not based on taskswitching nor multitasking.
> >> 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
I forgot some things: 3xSCC, 3xMSX-Music (FM-Ship, FM-Stereo-Pak, internal
FM-Pac in MSX2+), 2x MSX-Audio (Toshiba, one with sampleRAM, other with
keyboard), 2x14" RGB monitor, mono and 1x13"Monochrome monitor, mono. And
some more stuff which I don't use that much though.
So I've got more RAM and MSX-Audio (hehe) and MoonSound, but no MegaRAM and
a much smaller harddisk (too bad). However, I am making a lot of money now
(work everyday, 2 weeks long, in the holidays), so I will probably be able
to buy a Gfx9000 + IDE interface at the upcoming fair.
> But It still usefull. Tere is LOTS of games that doesn't run under
BDOS2.
Well then run them from disk in Dos1-environment or so...
Hey, did you know this (don't know if it works with MegaSCSI though):
At MSX startup:
keep SELECT pressed until beep: ignore HD interface.
keep CODE pressed until beep: ignore harddisk.
Works with my BERT interface...
> >> 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.
Oh.
> >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.
Well they are just programmed very badly.
> >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.
Map.com you mean I think...
> >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.
Hmmm... I have two mappers. External 2MB mapper and internal 128kB mapper.
> >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.
Ofcourse.
> >> 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.
Okay. Just heard some rumours and wanted to have them confirmed.
But they were fake. It's cool.
~Grauw
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