Apple II

Getting Apple ][ on a //e at boot

Submitted by fegos on December 7, 2021 - 2:06am

Hi, recently i picked up an old Apple //e from my infancy.   This computer was held at a repair shop (that my dad used to own) many years ago.   A blast from the past, i recovered some of the usabel hardware there.    Well in any case, the system was not booting.   I repaired the PSU, changed a shorted cap on the baord, reseated the chips and finally got it working.    

 

Now the weird thing is that when the system boots i see the following, not that i removed all cards:

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Apple II

Apple IIc internal drive stepper motor issue

Submitted by desertrout on December 5, 2021 - 1:12am

I've been trying to troubleshoot an issue with a IIc internal drive, but hitting a wall in my skills - I hope someone here can provide some insight.

On boot, the drive will spin up, the head will move back to track 0, but it will not read. This issue is not related to the analog board or the speed control board, as I've been able to swap in known-good boards and the symptom is the same.

So I'm supposing that there is an issue with one of the connectors or cables to the stepper motor, or perhaps something to do with the r/w head.

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Apple II

ZipGS and TranswarpGS cable pinout

Submitted by Wayne on December 2, 2021 - 11:51pm

I know ZipGS and TranswarpGS cables are different. Does anyone have the pinout on them?

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Apple II

How do I do a horizontally scrolling sine wave in Applesoft BASIC?

Submitted by DistantStar001 on November 30, 2021 - 7:25pm

I tweaked this program from something I saw on the 8-bit Guy.  Managed to get the wave to fill most of the screen, repeat, and end where it begins on the screen.  However, I was wondering if I could get it to scroll horizontally across the screen? or draw from right to left? I don't know, I'm just playing with BASIC and wanted some pointers.

 

Program listing:

5 HGR

10 HCOLOR=3

20 FOR X=0 TO 278

30 LET Y=INT(-65*SIN(X*3.14/28))+70

40 HPLOT X,Y

50 NEXT X

60 GOTO 5

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Apple II

Floppy EMU Model C and CPM?

Submitted by gottj on November 29, 2021 - 6:36pm

Has anyone here tried to put a CPM image on the Floppy EMU Model C and successfully booted it with a softcard or applicard installed?

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Apple II

Digitek screenmaster 80 card

Submitted by AndyG001 on November 29, 2021 - 3:56pm

Hi everyone, has anyone ever come across the Digitek Screenmaster 80 column card for the Apple II ?

if so do you have any documentation etc ?

Cheers

Andy

 

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Apple II

TL866II-Plus and 74LS51

Submitted by tolderlund on November 28, 2021 - 8:48am

I have noticed that a 74LS51 (location C13 on a A2 board) always fails when testing with the TL886II-Plus logic IC test function.

Even if I take one from a working A2 board.

I am using the lastest software version 11.60.

Can anyone here try the same and see what happens?

 

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Apple II

Custom Enclosure - Floppy Emu

Submitted by PTB on November 27, 2021 - 9:15pm

Hi All,

 

I had an old Disk ][ case with nothing inside and I also had a floppy emu….. the result was inevitable :)

IMG_2880.JPG

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Apple II

Laser keyboard

Submitted by Wayne on November 25, 2021 - 5:14pm

I pulled a Laser 128 out of storage and while it has a qwerty keyboard, it types dvorak and I can’t seem to see a a switch for going back to qwerty. ??

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Apple II

Disk ][ Card Problem

Submitted by Clacri5 on November 23, 2021 - 6:08pm

Hello everybody.

Could someone please help me and give some hints ?

After years of unuse I am now restoring an old APPLE ][ plus, RFI Revision "D".  When I put in the DISK ][ Interface (650-X104-) it works, but I see some vertical lines on the screen. Have a look at the foto please. These lines become darker if the drive motor spins and are colmpletely gone if I pull out the interface.

I had to replace a few RAM chips (4116) and one ROM was gone but now, ROM, RAM and PROMS on the DISK interface all test good.

 

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Apple II

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