Apple II

Schematics for a Apple IIe international NTSC motherboard - 820-0188-E

Hey everyone,

Does anyone have a schematic for a Apple IIe International NTSC board?  820-0188-E

 

Want to know what the solder jumpers are for.

I am in Australia and managed to get a proper NTSC crystal and now have colour on my CRT TV but cannot get colour on my other LCD screens which do support NTSC.

Wondering if the solder jumpers have anything to do with setting the system correctly to NTSC

 

Thanks

 

 

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Proper cable for ADTPro with Apple IIc+ and MacBook Air? Or, iBook G4?

            It's been several years since I've done ADTPro transfers and my equipment has changed.  I'm now using a MacBook Air.  What happened was that I discovered that my venerable Keyspan Twin Serial Adapter no longer works with modern Macs.  I'm on OS 10.12.6 Sierra.  I've ended up with several questions.  This gets a little long (apologies for that) as I left in details of what worked and didn't as a help to others in the future.

 

Question 1:  I was wondering if there is a MiniDin8 to USB cable that would work for connecting the IIc+ and the Air.   

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Apple II plus - yet another scrambled display issue

Hi everyone,

I have been following this forum for some time now, but this is my first post. Recently I bought an Apple ][+ from an auction site. After some work on the PSU I was able to proceed to the garbage screen phase :-) What happens is:

1) The power is fine, the keyboard lamp lights,2) there is a beep,3) the screen looks as attached, the contents are more or less random, but some 8-column pattern emerges,4) pushing reset on the keyboard does nothing.

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14.31818MHz Crystal required - Can anyone help?

Hey everyone,

I am trying to convert a couple of Apple IIe NTSC international motherboards to true NTSC.

I live in Australia and as such cannot get colour without replacing the crystal.

I understand that the system was very picky with the crystal and it needed to be just right.

Can anyone sell me a know working crystal or 2?  If so please message me.

 

Thank you!!

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Looking for NEC D416D RAM chip

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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Loading files on a IIGS

Greetings!

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Execute binary file on boot-up

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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Testing Ram on apple II Plus.

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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RAM2E - 2MB RAMWorks-compatible expansion for Apple IIe

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

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

 

TTFN, Josh

 

 

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