knight lore zx spectrum rom download z80

The 128K model saw a second 16 KB ROM chip ( Derby ROM) hosting the new 128K editor and enhancements with both ROMs and additional RAM using bank switching techniques to bypass the 64 KB memory limit of the Z80 processor. New features included three-channel audio via the AY-3-8912 chip, MIDI compatibility, 128 KB RAM, an RS-232 serial port and an RGB monitor output. The last Spectrum to be produced by Sinclair (developed in Cambridge but initially launched in Spain due to a deal with the Spanish Sinclair distributor Investronica) and based on the Spectrum+. But the new style helps the Spectrum to look less like a toy and more like a computer. Most hard core users (programmers and gamers) dislike the new keyboard. An upgrade package for older machines was also available. The 48K Spectrum gets a much needed solid keyboard and reset button, retailing for £180. ZX Spectrum+ with third-party joystick interface installed. As with the ZX81, 'RAMpack wobble' caused by poor connection with the expansion was the bane of many users, causing instant crashes and sometimes ULA or CPU burnout. Also available was an internal 32K RAM update, which consists of 8 dynamic RAMs and few TTL chips. Owners of the 16 K model could purchase an external 32K RAMpack that mounted in the rear expansion slot. Remembered for its rubber keyboard and diminutive size. Released by Sinclair in 1982 and available with either 16 KB (£125, later £99) or 48 KB (£175, later £129) of RAM and 16 KB ROM. An enhanced version of the Spectrum with better sound, graphics and other modifications was marketed in the USA by Timex as the TS2068. The Spectrum was the first mainstream audience home computer in the UK, similar in significance to the Commodore 64 in the USA (the C64 also being the main rival to the Spectrum in the UK market). Other machines available around the same time (for example the Commodore 64 and Amstrad CPC) did not suffer from this problem. This problem became a distinctive feature of the Spectrum and an in-joke among Spectrum users, as well as a point of derision by advocates of other systems. This led to what was called colour clash or attribute clash with some bizarre effects in arcade style games.

The Spectrum had an interesting method of handling colour the colour attributes were held in a 32×24 grid, separate from the text or graphical data, but was still limited to only two colours in any given character cell. The graphics resolution was 256×192 with the same colour limitations. The text mode display was 32 columns × 24 rows of characters from the Spectrum Character Set, with a choice of 8 colours in either normal or bright mode, which gave 15 shades (black was the same in both modes). The Spectrum's video display, although rudimentary by today's standards, was perfect at the time for display on portable TV sets, and didn't present much of a barrier to game development.

Knight lore zx spectrum rom download z80