TIL that the Apple I had provisions on the mainboard and in the user manual for using a 6800 instead of a 6502

Follow

the 6502 was famously *almost* pin-compatible with the 6800 and the Apple I user manual includes instructions for using a 6800 as the CPU

(presumably you were supposed to roll your own 6800 monitor ROM since i don't think Apple ever released one)

@revenant I learned ASM on a 6502 (blew proms for an NES cart)!

@chead same here, mostly via the C64 monitor in VICE (the NES was my inspiration though)

@revenant if you can afford the $375,000 to buy one of the surviving original Apple Is that is

@fraggle if only they had been built out of an easy-to-emulate combination of off-the-shelf parts

@revenant you could make one with a laser cutter and some powdercoat, the difficult part would be removing the original logo

@fraggle just gimme a big decal that matches the color of the aluminum imho, doesn't have to be fancy

@revenant @fraggle That's all that existed at the time the computer was made. Plenty of Apple I emulators out there, both in software form and as FPGA cores. :)

@revenant AFAIK, the 6800 monitor for the Apple-1 was eventually written... THIS DECADE...

@bhtooefr yeah i saw a short video earlier of someone getting it running, i'm surprised it took this long (well, not really considering nobody fucking owns an Apple I)

@revenant and AFAIK the only times it's been documented to be running are on clones or emulators (I think it was developed on a modified emulator, even).

@revenant Fun fact: the 6502 was the result of a lawsuit raised by Motorola. The 6500 chip was itself designed to be plug-compatible with the 6800 processor, but Motorola sued because of this. MOS Technologies settled the suit by agreeing to re-release the chip with a different pin-out: the 6502.

Sign in to participate in the conversation
Mastodon

Server run by the main developers of the project 🐘 It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!