@hkz oh, got it

@hkz you’re welcome. I’m not sure if it will help in the end, as interrupts aren’t supposed to be supported in ssc mode? https://github.com/oliverschmidt/super-serial-card

@hkz you did the 2.6 board? It’s faulty… https://github.com/rallepalaveev/a2pico/issues/4

@hkz There's no real changelog that I know of. I took the firmware source for the Apple IIc and modified it enough so that it can also build for the Liron card, and all the different SoftSP variants, so you can use that to see what is actually changed. https://github.com/btb/ProtocolConverter

@hkz It's definitely confusing. SoftSP is the work of Wing Yeung, from MFA2 labs and KbooHK, a modification of Apple's original SmartPort code, which bit-bangs the DiskII hardware in the absence of an IWM chip. v6a is the latest version, released in conjunction with the Grappler Minus, but as far as I know it applies to all hardware.

@hkz simplest of all would be making it use the non-diy softSP firmware variant, then there’s no need for bank-switching, etc. but in the end i think it would only save 1 chip, and I hadn’t done it because I didn’t want to undercut mfa2 labs too directly.

@hkz there’s not really that much to simplify anyway, my page explains what can be easily left out.

@hkz The SoftSP-DIY firmware works on my grappler+ clone https://github.com/btb/GraphicPlus
There are also simplified versions of it out there but afaik those just have gerbers available

@hkz hmm, yes others have experienced similar issues, but my bumbling around wasn’t enough to really nail it down. The Disk II circuit, which this is basically a superset of, is inherently sensitive I think. Some say that regular EPROMs aren’t fast enough to replace the state machine PROM. The ‘259 has to be fairly fast, like the 9334 originally specified. And the bus transceiver, not present on the Disk II, inherently adds some delay. Counterfeit chips are a big problem for it.

@hkz this always makes me nervous 😬

@hkz thanks for the mention! At the risk of further self-promotion, I also have this: https://gitlab.com/btb1/nesii which is maybe the simplest possible joystick, combined with a cheap 3rd-party nes controller.

@geerlingguy and all the other days are Internet Outrage Day

ftp should use port 1312

@hkz very nice work!

@hkz haha, yes, I was going to comment about this earlier, but I hadn’t really had a chance to look at your circuit

@foone c++ is great, if there’s a feature you aren’t happy about, just wait a little while!

@vwestlife @tubetime says the manual included schematics, but the chips are sanded 🤔

Reverse-engineering is finished: https://68kmla.org/bb/index.php?threads/reverse-engineered-classic-ii.50008/

Since I already had 3/4 of the frontside components removed, I was compelled to remove the rest of them and scan it in. So I guess pretty soon the "Classic II Reloaded" will be a thing. #macintosh #restoration

@MLE_online @smellsofbikes it didn’t even occur to me that you could also just go buy a brand new one but I guess you can! https://www.unicycle.co.uk/product/49-velocity-deep-v-road-rim-64-hole/