Recent content by retrobecanes

I have an IBM PC 5150 (model B) equipped with an IBM monochrome monitor 5151 and a VEGA Deluxe video card by Video Seven. I have set the VEGA card switches from sw1 to sw5 as off, off, on, off, on The toggle switch on the card is set to the right Dip switch 5 and 6 on the IBM 5150 motherboard...

The color on my VIC-20 is going in and out, I adjusted C3 to regain it but it is not stable and a little finger pressure on C3 is enough to affect the color. Now when I turn the VIC-20 on, it has color but then I played with the computer for 10 minutes and it goes to black and white. I turn the...

Is it correct to assume that the Horizon images wouldn't work on a N*Advantage 8/16?

So it appears that drive A may have some marginal alignments issues, but I need to do further testing to really diagnose the issue. Sometimes it runs a disk, sometimes it doesn't. Drive B on the other hand seems to be reading everything well and this consistently. I may just swap Drive A and...

Thank you very much, I will be testing this soon!

Hello group. I am catching up on this thread and I am very interested to see the progress that has been made using flashfloppy with the Northstar Advantage. I just restored a Northstar Advantage 8/16 and would love to use my Gotek Flashfloppy or my Lotharek with it. Is this possible now? And...

Thanks! I removed all the foam pads from the keyboard, they were crumbling. I still had a couple of foam & foil pads from TexElec (I ordered more) and I installed one for the return key. Now when I press return, the drive spins for a few seconds but then stops with a beep. Nothing other than...

I received a Northstar Advantage 8/16 today with plenty of original documentation and software. The computer, although a bit dusty inside and out, still looks great. When I turn on the computer, it powers up, beeps, and displays "LOAD SYSTEM" on the monitor. The foam keypads are shot so the...

resolved: the issue ended up being the LAG IC on the logic board!

Update: so with a given analog board that works with a Mac Plus logic board, I still get a “bong” following by the flupping with the Mac 128 logic board. However if I plug in the disk drive, the flupping stops but the screen is all black. If I insert a disk or the external floppy emu, the...

So I have tested three analog boards with a mac plus logic board and they all work. The mac 128 logic board however does not work with any of them. I no longer get a bong, it goes straight to “flupping”.

Where would be the test points for the voltages?

I am looking for assistance with a Mac 128K. At start up I get the « bong » but it’s followed by a repetitive « flup, flup, flup » sounds and nothing on the screen. The analog board works as I have used it with another logic board (Mac Plus). Hence I believe that the problem is with the logic...

You are right, I had missed it. I will see if it works. I am also recapping the whole board.