Recent content by Gorgonops

I'd be pretty surprised if you don't own an Apple IIe 80 column card if you own a IIe; if your IIe has 128k then it has one, and 64k IIe's are... pretty rare? I mean, I guess I'm not the one to ask but I think maybe I've seen one un-enhanced IIe in the flesh and even it had the "un-extended" 80...

I'm not entirely sure you can put those Videx cards in a IIe, I think the IIe's ROM natively emulates the same BIOS hooks they use for their own 80 column mode. (Which on a hardware level is implemented completely differently.) The "right" thing to have sitting on top of this would be a green...

If you feel like sharing the schematic once it's complete I wouldn't mind staring at it for a few minutes and making a wild guess what the registered one might do. As for the non-registered one, you might want to consider using one of those "bitbang it with an arduino" methods to at least get...

My vague recollection is that either a firmware update or a change to the "New World" soft-rom file broke the floppy drive hack a year or two after the iMac came out; said firmware update was supposedly non-negotiable for one of the OS 9 upgrades? Don't take this as gospel, it's a *very vague*...

If it’s your bag then go ahead and try. Just be realistic when it comes to asking someone else to do it. Working early rev. iMacs are at this point pretty thin on the ground and, I know this is editorializing, they were never that much to write home about. Owned a couple myself, did the ATX mod...

The TL;DR about the mezzanine slot is it's *basically* a PCI slot, although all the discussions about it which really had any technical details are at this point almost two decades old. To go a little further, an oddity of the iMac and some of its contemporaries (Pismo and Lobard Powerbooks, for...

Hah! Okay, then. Do you have a dev blog or something where you've been storing these juicy details, by any chance? Google needs to know about it if you do, the "varying the voltage" thing reads like an urban legend everywhere I saw it. :) Again, I would *hope* that a registered GAL on an...

Reading the datasheet it looks like "Medium" refers to a specific subset of combinatorial mode. (The GAL16v8 and 20v8 can emulate a bunch of older PAL devices, the difference between "Small" and "Medium" mode is the latter supports tri-stating the configurable I/O lines.) If you can get a...

Do you have an actual trusted source that goes into detail about this? I've seen vague mention of this on some electronics forums, posts going back to at least 2011 referencing some German Amiga fan who was very squirrely about documenting his methods. Frankly this sounds like a great way to...

If the GAL is just using combinatorial logic there are github projects out there for using an Arduino to bitbang out the wire map if the protection bit is set. If there is any registered logic then, yeah, life gets a lot harder. Do you know broadly where in the circuit the GALs live? (Are they...

FWIW, every single Mac that had the original 802.11b AirPort card slot and USB 1.1 ports also had an Ethernet port. And they also sell WiFi to Ethernet port adapters that can be powered off of a USB plug or power bank. So… I mean, yeah, it’s a slightly awkward workaround but technically you can...

The Netra T 1125 wasn't ringing a bell for me; I sometimes wake up in a cold sweat after nightmares about the little Netra T1 1Us or those gawdawful Enterprise 220/420 monsters. Looks like this was basically a Telco-racked version of the deskside Enterprise 250? I'd call you a monster for...

I think I would more interpret Cory's quote as simply meaning that running OS 9 on those machines is a "waste of potential", not that OS 9 objectively runs any worse on them than it does on any other late-stage PowerPC Mac. Although there are some specific pain points, I guess, like obviously...

To cut to the chase, yes, it essentially boils down to a lack of drivers for the hardware. The Quadra 610/650/800 were all considered “professional“ machines (or at least the 650 and 800 were and the 610 shared the same architecture) and thus made the cut to get the development work, while the...