ZX Spectrum 128

219,179pages on
this wiki
Add New Page
Discuss this page0 Share

The Spectrum 128 was the second model of Spectrum; the main improvements over the base model were 128Kb of RAM and an AY-3-8912 sound chip.

The comp.sys.sinclair FAQ contains detailed information on the Spectrum 128, but contains a number of errors/omissions:

  • Reading from port 0x7ffd does produce an effect: the value read (generally the floating bus value) is written back to port 0x7ffd. (This effect does not occur on the +2A/+3).
  • Contended IO does apply to ports in the range 0xc000 to 0xffff if a contended memory page is currently paged in.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Also on Fandom

Random wikia