Apple II

Looking for NEC D416D RAM chip

Submitted by mnemonic on July 19, 2019 - 7:11am

Hello,

one of the RAM chips in the middle memory row of my rev 2 is different from the others, which really bugs me when looking at it :-)

Does anyone know where I could source one of the gold ones (NEC D416D)?

 

Thanks for any help,

 

Carsten

 

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Apple II

Loading files on a IIGS

Submitted by ruthven on July 17, 2019 - 11:46pm

Greetings!

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Apple II

Execute binary file on boot-up

Submitted by gobblebit on July 17, 2019 - 8:31am

I have a binary file (asm program) that I've been using AppleCommander to place onto a DSK image, which I can then load into AppleWin. The program runs as I'd expect it to, but to use it I need to "BRUN <program>" from the initial Applesoft prompt. I know that the HELLO program on the disk is executed on boot, and that INIT can place the current BASIC program as the HELLO program and thereby run that program on boot. However, I'd like to run my binary file at boot up as if it were HELLO.

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Apple II

Testing Ram on apple II Plus.

Submitted by NovellNetware on July 17, 2019 - 1:17am

I used the following program.

 

C050 C053 C054 C057 N 265:FF N 266<265.BFFEM 266<265.BFFEV 265:0 N 266<265.BFFEM 266<265.BFFEV 34:14 (Return)

 

came back with serval numbers.  All the original apple chips have some stuff on them. But not down into the pin socketts. Of all strange things. I would just like to replace the 48k total with all new memory due to this. If somebody can point me in the correct direction. I would appriciated it.  The numbers on the chips are tm-s4116-20nl. So Texas instruments 20n ns? chips.

 

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Apple II

RAM2E - 2MB RAMWorks-compatible expansion for Apple IIe

Submitted by Zane Kaminski on July 15, 2019 - 6:38pm

As mentioned in my "five new open-source Apple II cards" thread, my friend and I have developed some new Apple II card hardware, so the first one I figured I'd try to finish is the RAM2E (GW4203) for Apple IIe. This card goes in the auxillary slot and adds 2 megabytes of bank-switched RAM, switchable by writing the RAM bank address into the softswitch at C073.

 

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Apple II

More pictures of the tear down of the II+ and oki printer.

Submitted by NovellNetware on July 14, 2019 - 9:50pm

This is just a thanks to everybody that helped. I took several additional pictures of the tear down.

 

TTFN, Josh

 

 

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Apple II

Five new opensource AppleII cards coming soon, but we need your help

Submitted by Zane Kaminski on July 14, 2019 - 1:04am

We (at Garrett’s Workshop) were a little surprised at how many people were interested in our GW4201-series RAM expansion for IIgs, so we figured we would design some new cards for the rest of the Apple II family:

 

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Apple II

Disk ][ LED fun

Submitted by macnoyd on July 13, 2019 - 9:10pm

I took a little time today to get my hardware fix and decided to draw up a schematic to the bi-color LED circuit published so long ago buy Fabien Bénattou.

Disclaimer by me:  I did not design this.  I only drew it to show it's simplicity.  Very clever design that most with a little electtronics experience can build.

With a little more circuitry, you can see how this can be an insert directly to the Disk ]['s ribbon cable rather than something wired onto the analog board.

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Apple II

APPLE II REDBOOK 1978

Submitted by Khaibitgfx on July 11, 2019 - 6:16pm

If anyone needs a new updated copy of the Apple II Redbook you can email me for the PDF, it has many improvements over the 2008 PDF which I also made.

This version contains many new pages that were not done in 2008.

In the months to come the entire Redbook is being redone with all pages complete.

Coming soon will be the Apple II Bluebook.

 

THX

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Apple II

II+ in the clear

Submitted by dorkbert on July 10, 2019 - 10:34am

I wonder where the shell was sourced from; since AFAIK Apple did not start doing clear shells for proto till Image Writer II time frame.

https://www.ebay.com/itm/202729852119

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