Post 9fdYuffVsHzQ5Dp79U by bhtooefr@cathoderay.tube
(DIR) More posts by bhtooefr@cathoderay.tube
(DIR) Post #9fdYj1ppdPFBM969zs by revenant@mastodon.social
2019-02-08T21:05:31Z
1 likes, 1 repeats
TIL that the Apple I had provisions on the mainboard and in the user manual for using a 6800 instead of a 6502
(DIR) Post #9fdYufHlIazUtYi98C by jk@mastodon.social
2019-02-08T21:08:46Z
0 likes, 0 repeats
@revenant thats the Luxury upgrade option for fancy rich people
(DIR) Post #9fdYuffVsHzQ5Dp79U by bhtooefr@cathoderay.tube
2019-02-08T21:13:34.244298Z
0 likes, 0 repeats
@jk @revenant You could also use a 6501 in there if you wanted.(But the only difference between a 6501 and a 6502, IIRC, is the pinout and clock circuitry - 6501 is socket-compatible with the 6800, but not instruction set compatible. The 6502 was the lawsuit-friendly version of the 6501, specifically to make Motorola happy.)
(DIR) Post #9fdcRXP3vRt3rqUaUy by revenant@mastodon.social
2019-02-08T21:14:22Z
0 likes, 0 repeats
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)
(DIR) Post #9fdcRXm6XmJp1JGzPk by bhtooefr@cathoderay.tube
2019-02-08T21:53:06.576143Z
0 likes, 0 repeats
@revenant AFAIK, the 6800 monitor for the Apple-1 was eventually written... THIS DECADE...
(DIR) Post #9fddMkyq7R4STxVkDA by revenant@mastodon.social
2019-02-08T21:54:52Z
0 likes, 0 repeats
@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)
(DIR) Post #9fddMlDjE4yrE8TdQ0 by bhtooefr@cathoderay.tube
2019-02-08T22:03:28.027216Z
0 likes, 0 repeats
@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).