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- 16:02, 20 November 2024 Fuller (hist | edit) [484 bytes] Spodula (talk | contribs) (Created page with "Category:Peripherals The Fuller joystick is a joystick interface that came with the Fuller box. It wasn't particularly popular. The interface uses standard Atari-style joysticks. Port $7f Bits are active low. unused bits should be masked out. {| class="wikitable" !Bit !Mask !Usage |- |0 |00000001 |Up |- |1 |00000010 |Down |- |2 |00000100 |Left |- |3 |00001000 |Right |- |4 |00010000 | Unused |- |5 |00100000 | Unused |- |6 |01000000 | Unused |- |7 |10000000 |...")
- 12:04, 30 October 2024 Keyboard (hist | edit) [4,644 bytes] Spodula (talk | contribs) (Created page with "=ZX Spectrum keyboard theory and practice== The original ZX spectrum keyboard is a 40 key rubber pad over a two layer membrane. The Electrical interface consists of 8 Diodes on the main board and 5 pins on the ULA to gate the results. == Z80 View == Programmatically, the port $FE is used to read the keyboard interface. It reads it 5 keys at a time. It relies on a bug in the z80 CPU in that performing an IN (C),A actually puts the entire contents of BC on th...")
- 20:33, 2 April 2024 PALS (hist | edit) [1,561 bytes] Szaszg (talk | contribs) (Disciple (and +D) PAL20L8 ICs)