This is a new thread to try and figure out why ProDOS 8 Version 2.4.2, nor Version 1.0.1 (copies on disk provided to me by Thellmer of this forum), will not boot beyond the "flash screen" which shows the program name and the copyright lines at the bottom of the screen. Nor will any copy of ProDOS that I had previosly download to disk from the ASCiiExpress website using my iPAD and the cassette IN port on my Apple II+. So I know the software is not corrupted. There is something wrong with my machine.
I want to get ProDOS working so I can use it with ADT to transfer ".dsk" files downloaded onto my Windows XP to my 64k Apple II+ machine using either a serial COM port and SSC card, or using the audio headphones output of my legacy internet connected Window XP machine connected into the cassette IN port on the Apple II+. Plus, ProDOS is much better I am told to use today with more peripherals on the Apple II+, etc., than the standard DOS 3.3.
Online reviews of ProDOS 8 ver 2.4.2 state, and every one I've chatted with about his issue has told me, that ProDOS 2.4.2 is supposed to work on any Apple II+ machine with 64k of RAM in it. Well it don't work on mine.
My 64k Apple II+ machine is almost 40 years old and had some issues turning it on the first time with C1 blowing in the power supply (which I easily fixed), some broken key stems which were not as easy to find and replace and get the keyboard back working, and some other minor issues like a not properly working parallel printer card, after the machine sat on a shelf for decades in my cellar. But I have it working fine now, with a Grappler+ parallel printer card in slot #1 which is hooked up to the Epson RX-80 printer.
That old workhorse Epson RX-80 no-frills printer works great for being as old as it is too, even though it needed a bit of tweeking to get it printing when I first got it. Some one had gotten into the platten area with a letter opener or pocket knife to probably clear a printer jam and bent a metal strip out of place causing the print head to jam there and sending the printer off line. Once I found it and unbent the metal strip, it worked fine. I bought it via eBay for the major expenditure of $39. :-) Heck, a box of sprocket feed paper for it cost me a lot more than the printer. :-) But I needed a vintage no-frills 9 pin dot matrix impact printer for my vintage no-frills Apple II machine. Slow printing but it works and is a great old-timers partner for my old Apple II+. I also have two disk controller cards installed which are in slots #6 and #5 which are connect to four Disk II drives.
In slot #0 is the UNITRON Language Card which came with the machine when I got it decades ago. It has that ROM chip on it besides the 16k of memory which is, as someone told me, sending the name UNITRON to the top line on my monitor instead of APPLE, when I turn on the machine. Other than doing that, I don't know what the purpose of that ROM chip was used for on that language card. So that describes my system.
I have tested all the memory using MECC Computer Inspector and it reports I have 64k. I've scanned and tested both my 48k of memory on the motherboard and the 16k on the Unitron LC. All reported working fine. So I don't know what exactly is the problem. But at this point, I'm suspecting the UNITRON card is the culprit.
Thus, I've ordered a plain jane 16k memory card made by Microsoft via eBay which will arrive next week. Maybe when I swap out that UNITRON card which has that ROM on it with the language card made by MSFT that only has 16k of RAM memory on it, my system will be fully functional as to being able to run ProDOS. Will know that disposition sometime early this coming week.
In the meantime if anyone has any other solutions or ideas to share with me, please let me here them. Thank you in advance.
P.S. I received my Super Serial Card today which I had ordered used on eBay. I have not installed that yet. I want to solve the ProDOS issue before cross-connecting my Windows XP machine COM1 port to my Apple II+ machine using the SSC card in the Apple II+, so I can then start using ADT file transfer of ".dsk" programs, etc. But I want to get the ProDOS not working issue behind me before venturing any further into the ADT app.