On the basis of which microcircuit should TR-DOS controllers be built?
ZXNet echo conference «hardware.zx»
Hello MegaMyth
For example, I find it difficult to answer. First and third. I would have something like this
wish:
To be able to operate both controllers on one computer
at the same time. Those. for copying in both directions.
If possible, please indicate this reasonable price and what are the differences from VG93;
speed,; container, etc.
Hello, All
This is why I’m interested... I found one interesting microcircuit, at an acceptable price for
such price opportunities. It has a built-in floppy drive controller, but it doesn't
compatible with 1818VG93. In addition to the flop controller, it also has a lot of different
goodies on board, which will be announced later.
I'm wondering how much compatibility with 1818VG93 is needed, or is it possible
Can I get by with standard TR-DOS functions when programming?
P.S. For reasons of political correctness, I don’t vote myself.
Hello MegaMyth
It depends on what goals to pursue. If compatibility is needed, then VG93, and if necessary
the ability to connect HD drives, then on any clone of i8272 (nec765). Both
schemes have a common drawback - the RAW track read command does not work correctly
(bit synchronization failure occurs). There is another option - implementation
controller on the FPGA, then you can support HD floppies and commands
compatible with VG93, and at the same time reading the track will work correctly.
Hello MegaMyth
Meg> On the basis of which chip should TR-DOS controllers be built?
You don’t need it anymore... You need a normal CF/IDE support, namely FAT16 and use
disk images without loading them into ramdisk. Someone already said what it is already
there is, but I forgot to say where it is...
Better yet, switch to direct use of SD/MMC (without any small controllers
ala IDE - SD/MMC), because this will allow you to use matrices not burdened with redundant
number of legs (it’s better to finally hang it on the AY ports).
Hello MegaMyth
Meg> There is no point in giving up a floppy disk because there is a need for it
Meg> (though in extremely exceptional situations)... and put it additionally
Meg> VG93 - irrational
In the absence of VG93, there is no point in the flop guide. Well, if you just finish chewing
latest flops :D And to buy (three-note) new ones... excuse me... the price is the same
antiques, but they have already written about their life expectancy...
Meg> What am I talking about all this...
Meg> There is just a small diagram for 250 rubles, in which:
Meg> FDD,HDD,LPT (SPP/EPP/ECP) 2 COM (full)
250rub??? Then it’s better to take the matrix than the unknown exoticism that
will eventually disappear.
ZY I previously exposed the circuit diagram and firmware of the tyrdos for trimming the chubby
cartoons, but due to the absence of VG93 in it, no one got into it...
Hello MegaMyth
Why is there no “other” section in the voting list?
You can push the vhdl version of wf1772 into the FPGA. A bit expensive, of course. But how
option.
Hello fan
What am I talking about...
There is just a small diagram for 250 rubles, in which:
FDD,HDD,LPT (SPP/EPP/ECP) 2 COM (full)
Although AVR is cheaper, it will not have a WAIT signal.
and it is 8-bit.
Personally, I don't want to use the AVR as a slow COM port when
When implementing a DMA controller, it appears that you can put information into the spec
speeds up to 2-3-4MB/Sec, and the AVR will definitely not have time.
There is no point in abandoning the floppy disk because... there is a need for it (though
extremely exceptional situations)... and install additionally VG93 -
irrational, especially since it requires additional strapping, unlike
the one I had my eye on.
Hello MegaMyth
Meg> FDD,HDD,LPT (SPP/EPP/ECP) 2 COM (full)
These modes make sense if IRQ/DMA is available. It's just a bidirectional port
(and even more) has already existed on spec for 100 years in the form of 580BB55.
Full-fledged COM... What is “full-fledged”? It can be done on PIC once
so hunting - it will take up much less space, by the way... Yes, and I think that 8250
They also sell for pennies.
Hello fan
fan> You don’t need it anymore... You need a normal CF/IDE support, namely -
fan> FAT16 and using disk images
Well, no, it’s really sad when you can’t squeak with a floppy disk.. IMHO not a bad option
there would be an FDD controller on the VG93 in the form of an expansion card, optional, that is. a
about cards - yes, they’re a good thing...
Hello KingOfEvil
Kin> Why is there no “other” section in the voting list?
Kin> You can push the vhdl version of wf1772 into the FPGA. A bit expensive, of course. But
Kin> as an option.
Ush is better then 1793...
I came home and thought this: If the COM port at decent speeds is 115 and
above, then is there a need for a flop as such? I doubt that
someone chose a spessi as their main car. Everyone has a pussy... turned it on
I uploaded it via cable to some storage device and that’s it... People just need it together
get together, come up with something like EtherBoot for the COM port and here you go:
The system broke down - I booted from the cable, and that's it.
HM. Again, there is something to think about at night.
Hello KingOfEvil
if on such a Spectrum Refresh does not work exactly the same as on
Pentagon128, then nafik need it?
Hello MegaMyth
Meg> Ush is better then 1793...
Meg>
Meg> I came home and thought this: If the COM port is at decent speeds
Meg> will be 115 and higher, then is there a need for a flop like
Meg> such? I doubt that anyone chose the Spessy as their main car.
Meg> Everyone has a pussy... turned it on and uploaded it via cable to some
Meg> carrier and that's it... People just need to get together and come up with an idea
Meg> something like EtherBoot for the COM port and here you go: system
Meg> broke down - booted from the cable, and that's it.
Meg>
Meg> H.M. Again, there is something to think about at night.
Then it’s easier to use a flash drive. But compatibility with old software is needed.
So people come up with different workarounds. One of them is vTR-DOS.
Hello MegaMyth
"I came home and thought this: If the COM port at decent speeds is 115
and higher, then is there a need for a flop as such? I doubt that
someone chose a spessi as their main car. Everyone has a pussy... turned it on
I uploaded it via cable to some storage device and that’s it... People just need it together
get together, come up with something like EtherBoot for the COM port and here you go:
The system broke down - I booted from the cable, and that's it. "
I'm updating the 48k firmware for LOAD/SAVE.
ZX TAPE-PC COM DOS(38400) Access files by name.
The speed is quite acceptable.
Hello deathsoft
Cough... someone decided to reinvent the wheel??!
Hello KingOfEvil
Flop must be killed completely; some manufacturers have already abandoned
production of 3.5" floppy disks, it will be the same as with film cameras. Support
dead media is stupid, the same applies to HDDs, by the way, but for a different reason -
their volumes are wild for Spec. The correct way is vTR-DOS, linking with a PC in any way
interface and the use of flash drives - it makes sense to spend time on this, and the controller
leave the flop alone - let it be as it is until it completely goes extinct.
Hello, The Exploited
The> 1. at the moment there is parity with the vgshka.
The> 2. on Intel, exactly as many programs will work as they do
The> from the ramdisk. those. a good part of disk drives and those created in the 90s are on their way
The> to the garden.
The> does anyone need this? Would you study the subject first before
The> put on a show here =)
The problem with the RAM disk and i8272 is only because they work at the level
call #3d13. If you make a VG93 emulator on a plis, you can read data from
udi image. Moreover, this image can be located anywhere: even on RAM
disk, even on a flash drive. In this case, absolutely all programs will work (even with
sophisticated defenses).
Hello KingOfEvil
Kin> Then it’s easier to use a flash drive.
And I have similar thoughts.
It’s better to switch to FAT and upload it manually onto cards/screws than this
pervert.
scl> and for me a Spectrum without a flop is not a Spectrum.
Then - “a Spectrum without 1818VG93 is not a Spectrum” ;)
-+------------------------------------------------------------------------------
And finally it turns out that the majority voted for Intel8272: D Well then
no problem, there are still enough dog cartoons until the end of total extinction
flops Topic here - http://zx.pk.ru/showthread.php?t=4081 (Doggie cartoon in
as FDI TR-DOS)
Hello, The Exploited
The> 2. on Intel, exactly as many programs will work as they do
The> from the ramdisk. those. a good part of disk drives and those created in the 90s are on their way
The> to the garden.
The> does anyone need this?
Ask those who voted for the third point :D
The> You should study the subject first before putting on a show here =)
Not at the address of the attacks...
Hello, The Exploited
The> what were you smoking?
See the subject and results. If people don't care, then they voted for Intel8272
. Firshtein?
Hello, Black_Cat
Bla> The flop must be killed completely, some manufacturers have already abandoned
Bla> produced by 3.5" floppy disks, it will be like with film cameras.
What's wrong with film cameras?
and for me, a Spectrum without a flop is not a Spectrum.
Hello, The Exploited
I meant full emulation from the screw.
SMUK+ProfPZU (I apologize for the inaccuracy in my previous post)
It’s somehow not logical to waste memory on a virtual floppy disk.
Is it really much easier to emulate a floppy disk from memory than from a hard drive?
Hello, DimkaM
Dim> I meant full emulation from the screw.
Dim> SMUK+ProfPZU (I apologize for the lack of accuracy in my previous post)
is she there?
Hello, DimkaM
Dim> I meant full emulation from the screw.
Dim> SMUK+ProfPZU (I apologize for the lack of accuracy in my previous post)
Dim>
Dim> It’s somehow not logical to waste memory on a virtual floppy disk.
Dim>
Dim> Is it really much easier to emulate a floppy disk from memory than from a hard drive?
There are advantages both here and there:
In the case of a screw:
- Smuk has a limit on the number of floppy disks;
- only a screw is used as a carrier;
- memory is free;
- when you turn off the power, the saves remain.
In case of memory:
- any media supported by the system (currently screw and SDROM);
- The number of floppy disks is not limited in any way.
From my point of view, the second method is more preferable, since at this time
There's a lot of memory clones being released and in the future (and that's what it's for)
intended). And of course, flexibility in supporting any media.
The main argument of opponents is turning off the power.