Apple II

Building the MMU on MAX7000 devices

In this thread: https://www.applefritter.com/comment/107057#comment-107057, retro_devices asks for help to program the MMU on some old Altera EPM7064LC44-10 and EPM7064LC68-10.I am starting this thread for that discussion.

 

The two devices are 64 macrocells, which is enough for the 58 macrocells the MMU currently requires.

 

I'm not too sure that this will be possible on MAX 7000 devices, though.

 

This is what I did / you can do:

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A small 2c project I'm working on...

I didn't have a working mouse for my //c. That ended earlier this week.

A tweak of an earlier design I used for Atari ST using a WinChipHead (Nanjing Qinheng Microelectronics) CH series microcontroller. The perf board prototype works great and PCB's are on the way. Most any USB HID or wireless HID (with a USB receiver) mouse can act as a //c mouse, or as an input device for a ][ or //e buss mouse card.

 

If there is any interest let me know. I'm still undecided on how to make this available.

 

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Change ProDOS file type to SYS

So I've written a small 65C02 assembler program that I want to change from BIN to SYS.  It is assembled (with my cross assembler) at $2000, and I can run it from the BASIC.SYSTEM command line or BITSY BYE.

 

Anyway, what is the easiest way to change a file type in ProDOS?

 

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Howto access GSBug within the GS+ emulator running on Windows 10

Does anyone know how to access the GSBug and/or ORCA Debugger from within the GS+ emulator. The 'hotkeys' for each of these usually invoke varying windows windows depending on which keys are pressed. The same problem exists for accessing the text mode control panels. It seems the author may not have 'trapped' the keys such that pressing the various 'hotkey' combinations access windows functions instead of IIGS functions.

Any help is appreciated.

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Apple II Rev 0 Keyboard Power Light Switch help

I have a broken switch housing for the power light on a rev 0 keyboard.

All my replacement switches I think are 'welded' closed. I can't seem to find a way to open them so I can replace the stem/plunger with the light bulb stem.

Any suggestions.

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Calling Applesoft GR routines from assembler

I used to have a document, magazine or book (well, I may still ahve it somewhere but I don't remember) back in the day which had info on how to call the Applesoft GR and HGR routines from assembler.  Basically where to JSR to do things and what memory locations and registers to set first.

 

If anyone has that or can point me to it, it would be great.  I wrote a little Applesoft program that draws a splash screen in low-res for a 32MB ProDOS disk image that I'd like to convert to assembler and make a .SYSTEM file out of.

 

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Apple III plus disk interface pinout (DB25)

I've been looking for this, but can't find it anywhere.

I know it's basically the same as the DuoDisk connector, but the available pinouts for that leave out many of the pins, since DuoDisk doesn't need them.

Apple made an adapter, IDC26 to DB25, to use the Disk III on the Apple III plus, but I don't see the specifications for that anywhere either. Does anyone have one of these adapters?

Or, is there anyone with an Apple III Plus who would be willing to beep out the connections between the inner 26 pin header and outer DB25 connector on the motherboard?

 

 

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Apple II+ woes continue...

Hey everyone...

I have been ignoring my II+ for a while (I have two of them), but got one down to fire up and ensure everything was OK. Obviously, since I am posting here, it isn't OK!

I can boot into DOS 3.3 via FloppyEmu or actual disk drive.  No problem.

When I try to boot anything that has graphics in it (let's say, Ultima IV, or ), I get random text on the screen, and the disk drive continues to spin, nothing happens.

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What I've been building the past couple days

Two already completely completed and tested, these are just waiting for 40 pin sockets and 82C55 chips to get here.

 

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How do I use this ALS Smarterm II?

I was looking through some old cards and came across this Advanced Logic Systems Smarterm II with RCA jacks. I tried to Google for it, but I'm not finding what I'm looking for. Does anybody know what this is used for? What are the RCA jacks for? I would guess it's for video, but there are no markings saying how they should be used. What slot does it go in?

 

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