... p Explorer Explore the memory layout of the ZX Spectrum and see how the CPU address space, physical RAM, dynamic memory areas and hardware expansions interact. Select a Spectrum model and use the controls below to change the memory configur ...
... er Spectrums, but the surrounding hardware was considerably expanded. The machine contained 128K of RAM, arranged as eight 16K banks, together with 32K of ROM. One ROM contained the original Spectrum software used by the 48K environment, wh ...
... xist, namely Kempston (IN 31); Cursor (keys 5,6,7,8); Sinclair (keys 1,2,3,4,5 and 6,7,8,9,0). "Programmable" joystick interfaces can be made to simulate any or almost any keypress which can be made. Features Original Price AGF II 2 joystic ...
... tible, the third has a dual facility and can be either Kempston or cursor key compatible. £19.95 2 RAM Turbo RAM Electronics Ltd The RAM Turbo Interface is a switchable joystick interface for the ZX Spectrum, supporting Kempston, Protek an ...
... xist, namely Kempston (IN 31); Cursor (keys 5,6,7,8); Sinclair (keys 1,2,3,4,5 and 6,7,8,9,0). "Programmable" joystick interfaces can be made to simulate any or almost any keypress which can be made. Many joystick interfaces will also inclu ...
... dentical and used the same basic hardware design, with the principal difference being the amount of RAM fitted. Sinclair also offered a 16K-to-48K upgrade for owners who wanted more memory. Contemporary pricing put the upgrade at around £6 ...
... keys were retained, making frequently used combinations easier to reach. The new keyboard made programming considerably more convenient, particularly for users who regularly entered graphics and extended-mode commands. It also made the Spe ...
... setting the system variables. CHAIN CHAIN f (BBC Micro & Acorn Electron only)Result: LOAD & RUN program f. If f is and empty string then the first program on tape encountered will be loaded. (BBC Micro & Acorn Electron) Not on the Spectrum ...
... pansion system designed for high-reliability backplane connection. [1] Planned Expansion Boards: 2K RAM Board, Disc Interface Board, Bar Code Reader Board, Full 80 Column Video Interface, Digital/Analogue Board, Full Colour High Resolution ...
... or £2.00 for Western Europe. SpecspansionFB tronics A combined 4-slot motherboard and 24-line programmable portboard. On board 5 volt regulator. Built-in address decoding available at three of the motherboard slots for up to a further 12 ...
... original ZX Spectrum+ 128K improved on the original ZX Spectrum by increasing Random Access Memory (RAM) from 48K to 128K, this allowed for the use of a RAMdisk or as Sinclair called it a 'silicon disc'. To access the silicon disc an exclam ...
... . @ 15% Super Talkerby Namal Associates Plugs into edge connector. 550 word vocabulary. 2K internal RAM. ½watt amplifier and built in speaker. Jack socket for external speaker. £69.95*9* excludes V.A.T. @ 15% Speak Easyby Belvedere Electr ...
... ariables, resets PLOT and PRINT positions and clears the GOSUB stack. If a number is specified then RAMTOP is lowered to n. On the Atom CLEAR behaves more like CLS on the Spectrum, clearing the screen rather than resetting the variables are ...
... ction set and registers to the Z80 used by the Spectrum so any machine code used within a BASIC program will have to be rewritten.Both the Dragon & TRS micros use a different version of BASIC to the ZX Spectrum. The Dragon 32 & 64 use a ver ...
... uses integer based arithmetic. This can make complex mathematics like trigonomety a bit tricky. Programs running under integer based BASIC may run faster than those running under floating-point BASIC, so the ZX80 may actually run some progr ...
... ariables, resets PLOT and PRINT positions and clears the GOSUB stack. If a number is specified then RAMTOP is lowered to n. CLEAR on the ZX81 only deletes all variables. To lower RAMTOP on the ZX81 the system variable RAMTOP located at 1638 ...
... aphics statements act quite differently. But the main difference is its use of structure within programs. Converting programs to run on the ZX Spectrum is not as difficult to overcome as it may seem and where possible I have included in the ...
... could be used. Below, the list of keywords is meant for those who wish to convert Commodore 64 programs to run on a ZX Spectrum and is limited by the fact that this is only a list of keywords and not a complete guide to the conversion proc ...
... he same colour codes as the Spectrum, and the ability to store machine code data within a BASIC program. Commands Keyword Meaning Comments APPENDSee MERGE CALL CALL m[,v]¦LCTN (n) (Lynx)Result: Calls a machine code subroutine at memory loc ...
... ction set and registers to the Z80 used by the Spectrum so any machine code used within a BASIC program will have to be rewritten.Both the Oric 1 & Atmos use a different version of BASIC to the ZX Spectrum called Oric Extended BASIC. The Or ...