... te system as ATTR and SCREEN$. Their coordinates are absolute, and not relative to the top lefthand side of the current window — as with PRINT AT. GET_ stores the display file information in memory followed by the attribute information. U ...
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... but does not explain how this may by of use in a program.VAL$ is explained in the user manual alongside the function VAL and in fact both functions are handled by the BASIC interpreter through the same ROM routine - a calculator subroutine ...
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... and the ZX Spectrum.The Commodore 64 was released in 1982, the same year as the ZX Spectrum, and outside of the United Kingdom, was the world's best selling home computer. With dedicated graphics and sound processors, the Commodore 64 boast ...
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... ad Consumer Electronics The ZX Spectrum +2 and +3 incorporate two joystick sockets on the left-hand side of the computer. Their joystick circuitry operates in the same way as the Sinclair Interface 2, so compatible software should be config ...
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... yboard and sloping profile. The raised ZX Spectrum+ logo remained on the case, with 128K added alongside it. The most obvious external change was the large heatsink mounted on the right side of the case. Its distinctive appearance quickly l ...
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... MTOP is lowered to n. (ZX Spectrum) A CLEAR command on the BBC Micro and Acorn Electron which sets aside space in memory does not exist. Instead these computers use the HIMEM pseudo-variable to change memory allocated to BASIC programs.See ...
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Home Hardware Peripherals Software Publications Projects A selection of routines for the ZX80 which simulate ZX Spectrum functions Overview A suite of routines for converting ZX Spectrum statements to work on the ZX80. FOR..NEXT loop with S ...
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Home Hardware Peripherals Software Publications Projects Comparison of ZX Spectrum BASIC with Oric 1 and Oric Atmos Extended BASIC Overview The following is a list of keywords, operators and delimiters used on the Oric 1 & Oric Atmos comput ...
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... -to-back adaptor required for first card and backplane. USP-BBP3 - A 3-slot buffered backplane with side connecter. Requires auxiliary power supply. USP-BPE4 - A 4-slot buffered backplane which provides a a further 4 slots after USP-BBP3. U ...
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... evisions followed as Sinclair continued to refine the design. These changes were generally hidden inside the familiar case, so the external appearance of the original Spectrum remained largely unchanged even while the electronics inside it ...
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... m cable. The larger of the two units houses the input/output sockets. The three sockets on the left side are Control IN, THRU, MIDI. The three on the right are all MIDI out. £74.00 (Siel)1£94.95 (Rosetti)1 Upstream MIDI InterfaceUpstream ...
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... nished in black ribbed plastic. The new case was approximately 320 mm × 140 mm × 40 mm and was considerably longer than the original machine. Two folding feet were incorporated underneath the case. When extended, these raised the rear of ...
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... tter or single letter followed by $ for a string argument. Not on the ZX81. Functions may be held inside a string variable and executed with VAL instead. DIM DIM α(n1,...,nk)DIM α$(n1,...,nk)Result: Sets up an array of numbers or characte ...
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... r defined functions. Where square brackets '[' or ']' are shown the statement, parameter or value inside the bracket is optional. References Sinclair ZX Spectrum BASIC Programming, Steven Vickers (author), Robin Bradbeer (editor) Timex Sinc ...
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... rs or joysticks that could be used with many different computers of the time, are also generally outside the scope of the site. Exceptions may be made for peripherals that were originally made for another computer but were marketed specific ...
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Home Hardware Peripherals Software Publications Projects Comparision of Keywords on the Sinclair QL and ZX Spectrum Overview The following is a list of keywords, operators and delimiters used on the QL and ZX Spectrum. The Sinclair QL uses ...
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... rwrite on - use CHR$ 21+CHR$ 1 VDU 22 - backspace - use control code CHR$ 8 VDU 23 - homes cursor inside window - no ZX Spectrum equivalent VDU 24 - double height characters on - no ZX Spectrum equivalent VDU 25 - double height characters o ...
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... sented a significant improvement in everyday use. Loading software was simpler, the keyboard was considerably more robust and the built-in cassette recorder gave the machine a much more integrated appearance. At the same time, however, the ...
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... isc was dropped in favour of a CP/M based system.Amstrad also introduced the +2A and +2B. On the outside these were branded simply as the +2 but in actuality were more like cut down +3's and used the same CP/M like commands to access the si ...
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... reset or NEW otherwise there may be unwanted results from the merging of any program which still resides in memory. SAVE Function Explanation Comments Save program and variables to tape (ZX80) Save program f$ and itsvariables to tape (ZX81 ...
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