3 ms·
The 68000 was from the same era yet it had a 24 bit address bus, enough for 16 MB.
by tonyedgecombe 2y ago
The 68000 was from the same era yet it had a 24 bit address bus, enough for 16 MB.
- deleted 2y ago[deleted]
- actionfromafar 2y agoAnd the 68008¹ was developed to overcome this problem of requiring too many data and address lines. 1: https://en.wikipedia.org/wiki/Motorola_68008 https://en.wikipedia.org/wiki/Motorola_68008
- gpderetta 2y agosure, but that limitation didn't show up architecturally, other than requiring more cycles to perform a load or store.
- elzbardico 2y agoThe 68000 was a high-end product, the 8088 was a lot cheaper, in a big part because of those design decisions, like having a 16 bit memory bus. This design allowed for a smaller chip, and keeping backwards compatibility with the 8080.
- jhallenworld 2y agoBut there is more: IBM basically stole the entire CP/M software ecosystem by using the 8088: assembly language CP/M programs could be more or less just recompiled for MS-DOS. Yet, it extended CP/M by allowing you to use more than 64 KB vs. 8080/Z80.