Firmware BASIC 48 1990
ZXNet echo conference «hardware.zx»
Hello caro
The controller is made according to the only VG93 scheme known to me.
With MAGIC button.
The scheme has been known since the 90s.
Hello andrew76
Have you looked at the scan of my controller? Those. that is assembled on the same board as
I sent it to you (zx-spectrum128k.narod.ru). Pay attention to the resistors that
microcircuits are placed on the legs. These resistors are not provided in the circuit, but they are important.
By the way, there is an error in the scan. In place of the AP6 buffer you need to put jumpers
"input-output", because the native buffer management scheme is incorrect. This controller is me
I have assembled it more than once, and there have never been any problems, provided that the connection is correct.
And, to be honest, I myself only connected it to Leningrad-2.
Hello andrew76
and> And no one has saved the firmware for Leningrad 48 1990. ta
and> which one has a turbo mode for a tape recorder?
and> Very necessary! If anyone has it, please throw it in the soap.
Threw it.
and> And firmware from 1982 is also needed.
Actually, it’s included in the firmware package of any emulator. Throw it once you ask :)
and> I just can’t start the drive controller. Already 10 times all
and> rechecked. So I think maybe it’s a matter of the firmware of the Spectrum itself?
The firmware of the Spectrum itself has absolutely nothing to do with it.
What scheme is the controller made of?
and> By command RANDOMIZE USR 15616 with physically disabled controller
and> disk drive what should happen?
and> When I use this command, it either freezes or gives some kind of error.
Everything is correct, since you are trying to execute code from an area containing
Spectrum character generator.
Hello, All
And no one has the firmware for Leningrad 48 1990. the one with the turbo
tape recorder mode?
Really needed! If anyone has it, please throw it in the soap.
And firmware from 1982 is also needed.
I just can’t start the disk drive controller. I've already checked everything 10 times. Here
I think maybe it's a matter of the firmware of the Spectrum itself?
By command RANDOMIZE USR 15616 with the drive controller physically disabled
what should happen?
For me, on this command, it will either freeze or give some kind of error.
andrew_b@ufanet.ru
Hello andrew76
and> I installed AP6. It seems that she transmits signals as noted
and> in red on the scan. Or shouldn’t it be installed at all?
As far as I remember, AP6 was never installed. It didn't work correctly for this reason
scheme. If you have TR-DOS ROM installed on the controller, then replace AP6 with
Also remove the jumpers and ROM from the controller. According to USR 15616 you should succeed
mattress Otherwise, the controller is not connected correctly. Well, or the m/sx is faulty somewhere.
Hello andrew76
http://zx-spectrum128k.narod.ru/Beta_disc_I_pic.jpg
This is a scan of my board (thanks to fan for the "hosting").
http://zx-spectrum128k.narod.ru/Beta_disc_I_pic1.jpg
it's the same thing but with important red moments.
Hello andrew76
and> I can’t get the TM2 trigger to reset to 0 by command USR 15616.
Then first try removing the resistor between the 12th leg of AG3 and the 13th leg of TM2.
Hello, Ivan
So what is the problem I can’t understand?
I installed AP6. It seems that she transmits signals as marked in red on
scan.
Or shouldn't it be installed at all?
Actually, that's not the point.
I’m telling you, I can’t even get the trigger to work correctly.
When resetting the computer, it is set to 1, but according to USR 15616 it is not reset.
I'm looking at it with an oscilloscope.
Hello, Ivan
I'll look at the scan in a minute.
Please explain in more detail about the “input-output” AP6?
I don’t understand something. What's wrong?
In the diagram? Or is it wrong on the scan?
Why hang resistors?
Hello, Ivan
> As far as I remember, AP6 was never installed. She didn't work
> is correct according to this scheme. If you have TR-DOS ROM installed on
> controller, then replace AP6 with jumpers, ROM from the controller too
> remove it. According to USR 15616 you should have a mattress. Otherwise controller
> is not connected correctly. Well, or the equipment is faulty somewhere.
I removed the ROM, according to 15161 I really have a mattress, just like with it connected
with the controller and without it.
Hello andrew76
Resistors for IE10?
I haven't even assembled this part yet.
I can’t force the TM2 trigger to reset to 0 using the USR 15616 command.
Hello andrew76
By the way, the Spectrum itself launched without any problems at all.
You could say it turned on right away.
Hello andrew76
And if you put a ROM with TRDOS in the Spectrum, should it start?
It won't launch for me.
Do you have ICQ?
Maybe we can discuss it there?
Hello andrew76
If the mattress is equipped with ROM, BASIC is disabled and DOS is not enabled. Roy in the direction
production CS, OE on ROM
Hello John North
Joh> so why do you need it then
Joh>
Joh> on the controller?
Joh>
Joh> The controller has 2 chips with TR-DOS
Joh> you need to connect 512.
Joh> i.e. CS, OE signals are brought to it.
Joh> if, of course, EVERYTHING is hardwired into it (b48, b128 and tr-dos).
That's exactly what I don't know how to connect it.
And I can sew it up any way I want.
I probably don’t need B128, I have Leningrad 1
Hello, Mikka_A
Yes, of course I got it.
Some kind person sent me the firmware. TR-DOS 5.04
Two chips, and by the way, connect one 27c512 so that there will be both BASIC and TR-DOS?
My Spectrum is 512 with BASIC ohm.
Hello andrew76
and> My Spectrum has 512 with BASIC ohm.
so why do you need it then
and> Two chips
on the controller?
you need to connect 512.
those. CS, OE signals should be brought to it.
if, of course, EVERYTHING is wired into it (b48, b128 and tr-dos).
Hello andrew76
and> I removed the ROM, By 15161 I really have a mattress, like with a connected one
and> with and without controller.
did you jumper ap6 or not, I still don’t understand?
please where did you get the trdos?
one chip?
two?
Hello John North
So TR-DOS 5.04 will not work without BASIC48?
Or will it be?
Hello andrew76
In general, what is the best way to lock the ROM on the Spectrum board itself?
I sent the RDROM signal to the ROM through a 1 kohm resistor.
Hello andrew76
and> I probably don’t need B128
let it be!
and the distribution of firmware is as follows:
conclusion 27 conclusion 1 contents
0 0 not use (use if desired)
1 0 tr-dos
0 1 b-128
1 1 b-48
ps; damn, engine; removes extra spaces. but, in principle, everything is clear.
Hello andrew76
and> I sent the RDROM signal to the ROM through a 1 kom resistor.
470-680 ohms, and jam an element with Z state or OK