Hi guys! On Apple's birthday I want to share a project with you, I did it for myself but I hope you will like it too.
Such cards are not new, I have seen different variants from other guys, my project is only made in the style of Apple 1 Cassette Interface (ACI) and also allows you to quickly and easily run some additional programs and games in a machine language in addition to Basic.
Apple Computer never produced such a card, but in an alternate reality where the two Steve's never met Mike Markkula and the world never saw the Apple II such a card could theoretically have appeared in 1979. That's when a 2732 EPROM with a capacity of 4kB came on the market, enough to hold Basic. On eBay I saw these vintage EPROMs in a beautiful purple ceramic case with gold-plated legs, it would probably look incredibly cool on my card, but eBay is no longer available to me, I buy everything on aliexpress now.
0: 0 5 0 20 for the test of both banks at once
0: 0 4 0 10 for the test of bank X
0: 0 10 0 20 for bank W test,
then you have to enter E000R and select the corresponding digit from the menu (1). Third EPROM with Basic, you can easily try your hand at programming. You can also use this card in tandem with the ACI card to load programs written in Basic. To do this, insert the EPROM with Basic in the zif slot, connect both cards and then do everything as if you were loading programs on machine code, and Basic will load automatically. On the last fourth EPROM there is another new game Jeff Jetton Worple!
This card is not intended to compete with the SD card or Juke-Box from the esteemed p-lab. Those who want more functionality and all the available Apple-1 software should look in the direction of these two cards.
At the link you can download the gerber PCB for ordering, the firmware images and the sticker file. I hope this will be useful to someone.
Nice, if the solder bride Y-F gets removed and S gets connected to F this nice PCB should be able to replace the two onboard PROMs.
If no PROMs are installed and only in this case the bride Y-F does not need to be removed.
Keep in mind Wozmon needs to be programmed to the end and not the beginning of the 4K EPROM.
The rest of the Eprom could be filled with Krusader.
With some little modification a 27c64 should be possible too which can hold Integer Basic as well.
The Apple I shown in front of the Kremlin is the one populated with eastern europe and USSR replacements parts right?
That ZIF EPROM board is a really nice idea!
Yes, I actually would like to see a board with russian chips.
I think this board is also usefull for diagnostics.
Thank you! I just wanted to have another way to load my favorite programs on my replica. Downloading programs through an ACI card is authentic but not very convenient. I have a Juke Box card, it's very handy but one look at it is enough to know it's not from the 70's, not authentic. For me the EPROM card was an acceptable compromise.
Here's a thread the author created four years ago here on applefritter - https://www.applefritter.com/content/apple-i-replica-using-ussr-components#comment-
In the first post there is a link to google drive with photos, I checked it still works.
And the picture brings back memories, its been a few years since I have stood in Red Square.
Thank you! As soon as things get better you can come again, fortunately nothing has changed there: crowds of tourists, people are still running somewhere and the line to the Lenin Mausoleum as before starts almost from the monument to Zhukov.