We turned on the Spectrum, and there were cubes :`-(
ZXNet echo conference «hardware.zx»
Hello Dut_Norshi
Dut> without disk part (temporarily disabled)!
Did you pull out the VG 93?
Hello Timon
Comrades, thank you all very much! The Spectrum has been repaired and is working for now :-)
without disk part (temporarily disabled)!
Only now you need to find a normal monitor or circuit for the current one
monitor (Taiwanese CM-1488B). The problem is that the image is shifted diagonally
and flattened (sort of), and only two knobs are brought out: H-SHIFT (doesn’t work)
and V-HOLD(working). Disassembled, inside there is no normal inscription, only
designations of elements for the diagram. :-(
Hello Orionsoft
Ori> Did you take out the VG 93?
Well, yeah for now. :v2_happy; At the same time; I unsoldered the drive cable from the board so as not to
got in the way. :v2_rolley
Hello Dut_Norshi
Magic is actually a separate button and has nothing to do with the keyboard
Hello,geners
gen> Majik is actually a separate button and has nothing to do with the keyboard
gen> has
Well, reset also has nothing to do with the keyboard? But they are separate
wired to the keyboard. There are additional buttons on the keyboard.
Hello Dut_Norshi
Dut> Does anyone have any thoughts on this? :v2_conf2;
Thoughts; like this - your input circuit from the "magic" button may be faulty and
the normal signal is now in inversion. As a result, when the computer starts, it’s already like
If I pressed the magic button - oops :) they flew away. It is worth disconnecting it completely to reassemble the computer and
run - if everything is OK - the reason will be found in one or two
microcircuits.
Hello Mick
Thank you! I'll try.
Hello Dut_Norshi
or just solder the inverter :)
Hello Dut_Norshi
If the drive is detected as "C", then swap pins 10 (DISK A) and
12 (DISK B) on connector (XP3:A11 and XP3:A12 on Pentagon 128 version 1991) by
advice from caro [http://zx.pk.ru/showpost.php?p=32896&postcount=3].
Please note that it is the DISK A and DISK B pins that need to be swapped, despite
then the drive is defined as "C"!
Hello, do_se
Yeah. Thank you! It works for me in real life _only_ when I specify exactly these
parameters(0 2). For any others, Spectrum says an error in track 0, sector
9. This is suspicious ;-)
Hello Dut_Norshi
Dut> I tried once to rewrite the TRD disk onto a floppy disk using the driver and
Dut> Alexander Medvedev's utilities, it hasn't worked yet: formatted
Dut> sealed floppy disk using formatt a 1 1, formatted
Dut> is fine. Then I wrote it using the command writetrd a 1 1 mytrd.trd
Dut> seems to have been recorded, but when launching the floppy disk on the Spectrum there is an error
Dut> reading
I just got writetrd a 0 2..... works great!
Hello Dut_Norshi
Do you happen to have a bad power supply, if so, try grounding it
case, in my house without grounding the same thing happens 8-)
Hello Dut_Norshi
Dut> "The data bus of this Spectrum in IM2 mode in TR-DOS is clogged!"
classic Pentagon bug. You can treat it, or you can leave it like that
Dut> After the port #7FFD blocking test, the next test starts
Dut> say that I have a Spectrum 48k
Of course this is how it should be - this is not a bug
Dut> Some TACT 0.1 test draws two masks and reboots the computer.
this test is critical to the length of the int, look in ramdoc and 4.30 - what is the length
inta - should be within 28-32 cycles
Dut> Is the memory somewhere bad/buggy or something else?
unlikely, but possible. you need to run some kind of program, actively
using computer resources (not much comes to mind..) well, for example,
black raven - intro or in the menu when the computer plays with itself, and
wait a few hours. If it doesn’t hang, then the problem is some small thing like
long int.
and also, try to pull out AY and run buggy programs without it
Hello, The Exploited
The> this test is critical to the length of the int, look in ramdoc and 4.30 -
The> what is the length of the int - should be within 28-32 bars
The>
I have the Pentagon, there the length of the int is longer
> unlikely, but possible. you need to run some kind of program
> actively using computer resources (not much comes to mind..)
> well, for example, black raven - intro or in the menu when it plays
> the computer is with itself, and wait a few hours. if it doesn't hang,
> it means it’s some little thing like a long int.
> and also, try to remove AY and run buggy programs without it
Thank you. I'll try! AY is not installed.
Strange. Today I turned it on - there are no errors with the data bus being clogged, BestView
launched normally and worked :v2_biggr; Paradox!;
I hear an underground knock :v2_lol:
Hello Dut_Norshi
Dut> I have a Pentagon, there the int length is longer
need to be edited
Dut> Strange. Today I turned it on - no errors with a clogged data bus,
Dut> BestView launched normally and Paradox worked!
Sometimes everything works when it’s cold, but when it warms up...
Hello, POIND
Wow! Thanks for the diagram! What are the elements U1B and U1C? What about U5(74ALS138)? A
Where should I connect the audio output? :D Straight to AY? Or what? Otherwise I don’t quite have the diagram
got it :-(
Hello Dut_Norshi
Dut> When connecting YM, I wanted to take the frequency directly from the Z80 (like, for example,
Dut> fan's diagram, if I'm not mistaken) and divide using connection
Dut> |SEL, but here they say that this cannot be done, because it is loaded uh...
Dut> in general something is being loaded
nonsense
Dut> and you need to take the frequency directly from the clock generator.
the divided frequency is already on the counters - why install extra mskh
Hello, The Exploited
Here are the quotes from Disabler^OHG;
"Disabler:; well done! Good luck! :-O and the fact that you are loading the tire is just that
will it pass?"
"Disabler; percent; loading is not good! There are buffered buses for
denouement! the whole thing is that when you connect not a percentage, TTL levels are cut off
signals and the computer starts to work unstable!"