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Unfortunately, the ZX Spectrum designers were working under extreme time pressure, and failed to notice this simple improvement. [11] While the original ZX Spectrum 48K model has 32 KiB of main RAM, the 16K model has just the 16 KiB graphics RAM. This is the reason why the colour attributes array was designed to fit in just 768 bytes.
Ultimately the Spectrum was released as seven models, ranging from the entry level with 16 KB RAM released in 1982 to the ZX Spectrum +3 with 128 KB RAM and built-in floppy disk drive in 1987. Throughout its life, the machine primarily competed with the Commodore 64, BBC Micro, Dragon 32, and the Amstrad CPC range. Over 24,000 software products ...
MCGA and VGA graphics standards for backward compatibility; Commodore 128 series for its 80-column mode; ZX Spectrum (and compatible) (with spatial constraints - only 2 colours for each group of 8x8 pixels) CPC 464/664/6128; Sharp MZ-800 series computers; Thomson MO5 and TO7 (with spatial constraints - only 2 colours for each group of 8x1 pixels)
ZX Spectrum Next: 2020 FPGA 6912 Bytes, 48K (layer 0) + 1280 Bytes sprite RAM Full: 32x24 Text in 256×192 Graphics 15 or 256 colors 80x24 in 512x192 2 or 256 colors Semi: 64x48 15 colors 32×24, 32x192, 256×192, 512x192 LC, BG, SC, SP yes 256 entries 512 colors 64 sprites, hardware scrolling, copper, [140] tile-map
This graphics architecture was retained right through to Sinclair and Amstrad's later redesigns of the Spectrum, up until Amstrad's final model, the ZX Spectrum +3, despite subsequent models having contained 128 KiB of RAM, reducing the need to save memory in this manner.
Personalities can match hardware features, timings, memory, graphics and sound capabilities and OS version with the machines to be reproduced in an effort to provide full compatibility with them. The default personality of the Next is based on Sinclair ZX Spectrum +3e. It is also possible for the user to configure and add new personalities as ...
The Kay 1024 [1] [2] [3] was a Russian ZX Spectrum clone introduced in 1998. [4] [5] [6] Created by the NEMO [7] [8] company of St. Petersburg, it has 1024 KB of RAM. [5] It was a rival to Scorpion ZS 256, having a slightly lower price. It offered a controller for a PC keyboard and HDD, but not for floppy disks (although available as an ...
CPU: 8-bit MME 80A at 1.875 MHz (half the speed of the original ZX Spectrum) RAM: 48 KB (16× КР565РУ5Г chips) ROM: 16 KB (2× К573РФ4А) [2] Resolution: 256 x 192 pixels, or 24 rows of 32 characters each; Number of colours: 8 colours in either normal or bright mode, which gives 15 shades (black is the same in both modes) Power unit: 5V ...