Apple II

I am interested in trying to find out as much as I can about the Apple II siftware called AplleTel. This package was used to access videotex/viewdata services back in the 1980s. There was also a viewdata editing system with special keyboard and graphics card.I currently maintain the TELSTAR videotex service here in the UK (https://glasstty.com) and am hoping to archive as much videotex software as I can find.If anyone is able to help, I would be most grateful.

I was finally able to power on and test my Digital Apple RGB Monitor //. 

I used these years ago, and I could swer that shen put into monochrome mode, the phosphour colour was teal-blue. This one is very much green. It also has a colour issue in RGB mode, which may be related, where white is orange-y.

My first question: Do any of you recall these being teal monochrome; and were there different phosphour modes on them in monochrome mode?

I was looking into the PROM P5 that is on the 16 sector / track Disk 2 card.

So far I seem to understand what is going on there, except for this code snippet just at the beginning:

C600 A2 20 A0 00 A2 03

which disassembles to this:

C600 LDX #$20C602 LDY #$00C604 LDX #$03

So when the program is entered at $C600, as some authorative sources claim, the first LDX# does not do anything useful, because X is overwritten by the LDX #$03 before the first X value loaded can do anything else.

Can anyone recommend a quick, easy and simple newbie (downloadable) book, guide or web page for someone who's interested in getting started with the Apple II but has no prior knowledge or experience with it?