Apple II

Softcard II and AMD AM2950

Submitted by Wawavoun on April 21, 2023 - 4:56pm

Hi,

I recently got a Microsoft Z80 Softcard II for Apple II. It looks the board works (CPM boot) but they need more tests before conclusion.

On this board there is a AM2950 chip. They get very hot...

I dont know what it is and his purpose. I try to find a datasheet but without success...

Anybody has information about this component ?

 

Regards.Philippe

 

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My Apple II Rev 0 & PSU Info

Submitted by LaserMaster on April 21, 2023 - 2:53pm

I'm preparing my Apple II Rev 0 and related documentation for sale soon, as mentioned in a earlier post on this forum.  I last powered it on successfully in September 2014 and let it run a few days, with on/off cycling every so often.  Turned it off, backed away in its Apple carrying case and put it on a shelf.

 

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Apple II

DAN][ Controller with Ethernet and FTP Server

Submitted by MacFly on April 21, 2023 - 6:19am

I haven't seen reports of people using the DAN][ controller's Ethernet option. This is also a neat feature that Daniel added to the card. He added support to "IP65", the 6502's TCP/IP library. There is an example disk in the github project.

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Apple IIe scambler display no keyboard led

Submitted by AppleWoz on April 19, 2023 - 11:11am

hello everyone, I have this apple IIe, the power supply was completely delivered and the voltages are perfect, initially it didn't turn on there was smoke on the capacitor C17 because it was shorted and it was replaced, now it turns on but this screen appears , no sound and no light on the keyboard, the red led of the motherboard is steady and on, I tried to swap all the integrated (the removable ones) with another APPLE 2e and the situation hasn't changed

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$0201 error on a IIgs

Submitted by mabalmer on April 18, 2023 - 10:17am

Hi, folks, 

I'm trying to track down the source of a problem that I've started having with my Apple IIgs all of a sudden. I've noticed that any time I try to launch a ProDOS 8 program (even something as simple as going to BASIC) the system crashes with error $0201, forcing a restart. 

I looked up the error code, and it seems to be a memory allocation error. The error does not happen when running GS/OS-based programs. 

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YKH-128 (aka HMS-3264) EPROM Programmer... searching for the software disk

Submitted by devorn on April 16, 2023 - 4:00am

I have this old EPROM Programmer card (called a  YKH-128) that I acquired around 1983.  It is the type with three ZIF sockets designed to handle 2716, 2732, 2732A, and 2764/27128 respectively with the correct volatges generated for burning reliably. It is also an almost exact clone of the Hollister Microsystems HMS-3264 card. Over the years and several moves, I no longer have the software diskette for driving it, and the disk image does not appear in the usual repositories (eg Asimov).  No roms on this card, all of the logic is driven from the utility program. 

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Apple II

HS SCSI card died

Submitted by nick3092 on April 15, 2023 - 5:19pm

About 2 months ago I got a bluescsi for my Mac plus, and decided to pick up a high speed scsi card for my IIgs. I hadn't used the IIgs a lot since, but it was working. The past two days I had been using it more. Today suddenly GSOS was prompting me to insert my virtual drive when trying to shut down. I had no choice but to power off. When I powered back on, the boot screen hung, and eventually it tried searching slots 6 and 5. So the IIgs saw the scsi card in 7, but couldn't find the drives.

 

 

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v2 Analog

Submitted by Ronin47 on April 14, 2023 - 8:17am

I've just built one of these:

 

∀2 Retro Computing - Analog (v2retrocomputing.com)

 

And I have to say the output is beautiful compared to composite, here are a couple of pics:

 

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Apple II

Metal square over 3.5" drive head fell off, is it required?

Submitted by jasonnovak on April 13, 2023 - 12:45am

I opened up the 3.5" floppy drive from my IIgs to retrobright the case and two small metal squares with numbers printed on them fell out. Checking pictures the drive, it looks like it was glued right above the head. The top I can access, I assume on the bottom you have the tear the drive down completely. Not sure what these do, if it's ok to just leave them off?

 

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Apple II

Changing the Apple //c Startup Text

Submitted by RadioC1ash on April 12, 2023 - 9:57pm

I've been just reading Fuji's writeup from a few years back on adjusting the startup text on an Apple IIe by changing some of the ROM's code. I wondered if a similar operation could be performed on a IIc, and if anyone might have some experience with that or any other modifications to a //c ROM. 

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