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Robotrontechnik-Forum » Technische Diskussionen » A5120 boot-disk » Themenansicht

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Thread - Seiten: -1-

000
30.10.2014, 12:29 Uhr
mjarenta

Hello
I am looking for Robotron A5120 boot disk copy to write it in PC (my A5120 has high-density drives like PC). I have A5120 but no disks, and it only displays random letters in screen.
Could somebody send me a copy of disk?
When computer is switched on, lamps on floppy drives light in sequence and random letters appear on screen. Is it normal without system disk?
Thanks in advance
MJ

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001
30.10.2014, 12:45 Uhr
holm

Avatar von holm

If Your A5120 has high density drives that are actualy working, than it is no A5120...

The A5120 has an K5122 Floppy Controller that is able to format maximal 800 KBytes on such a disk,
That is 2S2D not HD at all.

The behavior of the A5120 with the random letters is ok.

You can create a Bootdisk with Teledisk or CopyQM (sorry, don't have an image for you) but this doesn't work on every PC, since not all PC Controllers are able to write the neccessary 26x128 Format of the two boot tracks from that disks.

Regards,

Holm
--
float R,y=1.5,x,r,A,P,B;int u,h=80,n=80,s;main(c,v)int c;char **v;
{s=(c>1?(h=atoi(v[1])):h)*h/2;for(R=6./h;s%h||(y-=R,x=-2),s;4<(P=B*B)+
(r=A*A)|++u==n&&putchar(*(((--s%h)?(u<n?--u%6:6):7)+"World! \n"))&&
(A=B=P=u=r=0,x+=R/2))A=B*2*A+y,B=P+x-r;}

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002
30.10.2014, 13:06 Uhr
mjarenta

Thank You for reply.
My A5120 was opened, (I found fan replaced), so drives could be replaced too. They are two TEAC FD-55FGR and one TEAC 2S2D. I can install other, I probably know what jumper configuration is.
I also have K5601, I can install it.
I used Teledisk and CQM with success in my PC.

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003
30.10.2014, 13:16 Uhr
ambrosius

If you can wait until next week, I can create an boot disk with an configuration of
your A5120. Do you have an serial or parallel keyboard?

Best regards
Holger
--
viele Grüße
Holger

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004
30.10.2014, 13:29 Uhr
mjarenta

Thank You.
My keyboard is connected to serial port (small connector in serial/parallel board extended to side of computer). It has cursor keys.
Floppy disk drive cable has MOTOR lines connected to LCK lines in AFS - maybe first drives had no MOTOR-SELECT jumper, these Teac drives have it installed.

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005
30.10.2014, 14:26 Uhr
Rüdiger
Administrator

Zitat:

ambrosius schrieb
Do you have an serial or parallel keyboard?

...and which type of screen (16 or 24 lines)?
--
Kernel panic: Out of swap space.

Dieser Beitrag wurde am 30.10.2014 um 14:35 Uhr von Rüdiger editiert.

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006
30.10.2014, 14:49 Uhr
mjarenta

Hello
24 lines, K7023.

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007
30.10.2014, 15:00 Uhr
Rüdiger
Administrator

Zitat:

mjarenta schrieb
24 lines, K7023.

Sure? Normally K7023 has only 16 lines. And K7024 has 24 lines.
--
Kernel panic: Out of swap space.

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008
30.10.2014, 15:27 Uhr
mjarenta

This is strange.
Board is 012-6832. Looks like 7023.
And if I count lines of the garbage I always end with... 32.
I have also spare 012-6830 (in board is written 7023 01), different RAM installed, but its characters are incomplete (first tries with TTL probe show one line of EPROM dead, I will burn a new one).

Dieser Beitrag wurde am 30.10.2014 um 15:29 Uhr von mjarenta editiert.

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009
30.10.2014, 15:51 Uhr
holm

Avatar von holm

Are the video ans sync cable connected with conncetors using screws?

Regards,

Holm
--
float R,y=1.5,x,r,A,P,B;int u,h=80,n=80,s;main(c,v)int c;char **v;
{s=(c>1?(h=atoi(v[1])):h)*h/2;for(R=6./h;s%h||(y-=R,x=-2),s;4<(P=B*B)+
(r=A*A)|++u==n&&putchar(*(((--s%h)?(u<n?--u%6:6):7)+"World! \n"))&&
(A=B=P=u=r=0,x+=R/2))A=B*2*A+y,B=P+x-r;}

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010
30.10.2014, 16:13 Uhr
mjarenta

Yes, screws on card's side, plug on monitor's side, intensity line from CRT goes to ground in card.

EPROM replaced, now both cards show garbage. Example picture below:

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011
30.10.2014, 17:39 Uhr
Rüdiger
Administrator

Zitat:

mjarenta schrieb
Yes, screws on card's side, plug on monitor's side, intensity line from CRT goes to ground in card.

EPROM replaced, now both cards show garbage. Example picture below:

OK, 16 lines as expected.
--
Kernel panic: Out of swap space.

Dieser Beitrag wurde am 30.10.2014 um 17:45 Uhr von Rüdiger editiert.

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012
30.10.2014, 21:39 Uhr
holm

Avatar von holm

Nothing to worry, 16 lines as Rüdigers says. You got confused b'cause of the character set itself.

Regards,

Holm
--
float R,y=1.5,x,r,A,P,B;int u,h=80,n=80,s;main(c,v)int c;char **v;
{s=(c>1?(h=atoi(v[1])):h)*h/2;for(R=6./h;s%h||(y-=R,x=-2),s;4<(P=B*B)+
(r=A*A)|++u==n&&putchar(*(((--s%h)?(u<n?--u%6:6):7)+"World! \n"))&&
(A=B=P=u=r=0,x+=R/2))A=B*2*A+y,B=P+x-r;}

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