{"id":418,"date":"2022-02-20T12:08:30","date_gmt":"2022-02-20T11:08:30","guid":{"rendered":"https:\/\/www.sinclaircollection.site\/?page_id=418"},"modified":"2025-09-09T09:23:44","modified_gmt":"2025-09-09T07:23:44","slug":"sinclair-zx-spectrum","status":"publish","type":"page","link":"https:\/\/www.sinclaircollection.site\/?page_id=418","title":{"rendered":"Sinclair ZX Spectrum 48K"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"418\" class=\"elementor elementor-418\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3b8fd6d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3b8fd6d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c8e3e69\" data-id=\"c8e3e69\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-b7dff20 elementor-section-content-top elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b7dff20\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-e0b76ad\" data-id=\"e0b76ad\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-70d4342 elementor-widget elementor-widget-image\" data-id=\"70d4342\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 05-08-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"920\" height=\"599\" src=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/05\/000-2-1024x667.jpg\" class=\"attachment-large size-large wp-image-6876\" alt=\"\" srcset=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/05\/000-2-1024x667.jpg 1024w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/05\/000-2-300x196.jpg 300w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/05\/000-2-768x501.jpg 768w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/05\/000-2-1536x1001.jpg 1536w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/05\/000-2.jpg 1760w\" sizes=\"(max-width: 920px) 100vw, 920px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-061c14a\" data-id=\"061c14a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fef42ac elementor-widget elementor-widget-text-editor\" data-id=\"fef42ac\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 05-08-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>Brand:&nbsp;<strong>Sinclair Research Ltd.<\/strong><br>Model:&nbsp;<strong>ZX Spectrum<\/strong><br>Made in: <strong>United Kingdom<br><\/strong>Manufacturer: <b>Timex Corp.<\/b> (Dundee, Scotland)<br>Launch date: <b>23 April&nbsp;1982<\/b><br>Price in UK: <strong>\u00a3175<br><\/strong>Price in NL:&nbsp;<span style=\"font-weight: 700;\">\u0192 898<\/span>&nbsp;(03-&#8217;83)&nbsp;<span style=\"font-weight: 700;\">\u0192 699<\/span>&nbsp;(10-&#8217;83)<strong><br><\/strong>Price in Fr:&nbsp;<span style=\"font-weight: bold;\">1965 F<\/span>&nbsp;(2325 F with Peritel interface)<\/p>\n<p>Board design:&nbsp;<span style=\"font-weight: bold;\">Richard Altwasser<\/span><br>Software:&nbsp;<span style=\"font-weight: bold;\">Steve Vickers<\/span>&nbsp;(at Nine Tiles Ltd.)<br>Case design:&nbsp;<span style=\"font-weight: bold;\">Rick Dickinson<\/span><\/p>\n<p>Dimensions:&nbsp;<span style=\"font-weight: bold;\">233 \u00d7 144 \u00d7&nbsp;<\/span><span style=\"font-weight: bold;\">30 mm<\/span>&nbsp;(feet adds 2 mm)<br>Weight:&nbsp;<span style=\"font-weight: bold;\">557-591 g<\/span>&nbsp;(Issue 3B, &#8220;Portugal&#8221;)<br>Box dimensions: <b>359 \u00d7 198 \u00d7 110 mm<\/b><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-4704783 elementor-widget elementor-widget-text-editor\" data-id=\"4704783\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The Z80 CPU could only address 64 Kb of memory. 16 Kb was occupied by the ROM, leaving the remaining 48 Kb of memory to RAM on a maxed out <i>&#8216;Speccy&#8217;<\/i>.<\/p>\n<p><i>(Text continues below the gallery)<\/i><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8f4c3a elementor-widget elementor-widget-image-gallery\" data-id=\"e8f4c3a\" data-element_type=\"widget\" data-widget_type=\"image-gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 05-08-2024 *\/\n.elementor-image-gallery .gallery-item{display:inline-block;text-align:center;vertical-align:top;width:100%;max-width:100%;margin:0 auto}.elementor-image-gallery .gallery-item img{margin:0 auto}.elementor-image-gallery .gallery-item .gallery-caption{margin:0}.elementor-image-gallery figure img{display:block}.elementor-image-gallery figure 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data-elementor-lightbox-title=\"Box\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzI4MiwidXJsIjoiaHR0cHM6XC9cL3d3dy5zaW5jbGFpcmNvbGxlY3Rpb24uc2l0ZVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyM1wvMDdcL2JveDQ4ay5qcGciLCJzbGlkZXNob3ciOiJlOGY0YzNhIn0%3D\" href='https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/07\/box48k.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/07\/box48k-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/07\/box48k-150x150.jpg 150w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/07\/box48k-666x666.jpg 666w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2023\/07\/box48k-96x96.jpg 96w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"e8f4c3a\" data-elementor-lightbox-title=\"Polyethylene box\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzUzLCJ1cmwiOiJodHRwczpcL1wvd3d3LnNpbmNsYWlyY29sbGVjdGlvbi5zaXRlXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDIyXC8wMlwvMTRfOV9aWF9TcGVjdHJ1bV9wb2x5LmpwZyIsInNsaWRlc2hvdyI6ImU4ZjRjM2EifQ%3D%3D\" href='https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly-150x150.jpg 150w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly-640x640.jpg 640w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly-666x666.jpg 666w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly-96x96.jpg 96w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_9_ZX_Spectrum_poly-50x50.jpg 50w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"e8f4c3a\" data-elementor-lightbox-title=\"SRBP (Synthetic Resin Bonded Paper) PCB\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzU1LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNpbmNsYWlyY29sbGVjdGlvbi5zaXRlXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDIyXC8wMlwvMTRfMTFfVW50aXRsZWQtMS1TUkJQLVN5bnRoZXRpYy1SZXNpbi1Cb25kZWQtUGFwZXItcGNiLXNjYWxlZC5qcGciLCJzbGlkZXNob3ciOiJlOGY0YzNhIn0%3D\" href='https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-scaled.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-150x150.jpg 150w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-640x640.jpg 640w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-666x666.jpg 666w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-96x96.jpg 96w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_11_Untitled-1-SRBP-Synthetic-Resin-Bonded-Paper-pcb-50x50.jpg 50w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"e8f4c3a\" data-elementor-lightbox-title=\"Assembled in Portugal\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDIzOCwidXJsIjoiaHR0cHM6XC9cL3d3dy5zaW5jbGFpcmNvbGxlY3Rpb24uc2l0ZVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyMlwvMTFcL3BvcnR1Z2FsLmpwZyIsInNsaWRlc2hvdyI6ImU4ZjRjM2EifQ%3D%3D\" href='https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/11\/portugal.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/11\/portugal-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-4238\" srcset=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/11\/portugal-150x150.jpg 150w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/11\/portugal-666x666.jpg 666w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/11\/portugal-96x96.jpg 96w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-4238'>\n\t\t\t\tAssembled in Portugal\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"e8f4c3a\" data-elementor-lightbox-title=\"Advertisement\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzU0LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNpbmNsYWlyY29sbGVjdGlvbi5zaXRlXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDIyXC8wMlwvMTRfMTBfenhfc3BlY3RydW0uanBnIiwic2xpZGVzaG93IjoiZThmNGMzYSJ9\" href='https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum-150x150.jpg 150w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum-640x640.jpg 640w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum-666x666.jpg 666w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum-96x96.jpg 96w, https:\/\/www.sinclaircollection.site\/wp-content\/uploads\/2022\/02\/14_10_zx_spectrum-50x50.jpg 50w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-72bd266 elementor-widget elementor-widget-text-editor\" data-id=\"72bd266\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>To save on cost, Sinclair used rejected RAM chips for its 32 kb memory extension. These chips had either a functioning lower or the upper parts of the original 64 kb. A jumper wire&nbsp; on the motherboard would select which part of the chips had to be used (&#8216;3&#8217; or &#8216;4&#8217; for TI, &#8216;H&#8217; or &#8216;L&#8217; for OKI as indicated by the part number of the chip).<\/p><p>Another jumper wire marked &#8216;TI&#8217; and &#8216;OKI&#8217; would select between Texas Instruments and OKI memory chips since the bit cell geometries differ between these brands.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Brand:&nbsp;Sinclair Research Ltd.Model:&nbsp;ZX SpectrumMade in: United KingdomManufacturer: Timex Corp. (Dundee,<\/p>\n<p><span class=\"more-link\"><a href=\"https:\/\/www.sinclaircollection.site\/?page_id=418\" class=\"readmore\">Continue reading<span class=\"screen-reader-text\">Sinclair ZX Spectrum 48K<\/span><\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-418","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=\/wp\/v2\/pages\/418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=418"}],"version-history":[{"count":116,"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=\/wp\/v2\/pages\/418\/revisions"}],"predecessor-version":[{"id":13280,"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=\/wp\/v2\/pages\/418\/revisions\/13280"}],"wp:attachment":[{"href":"https:\/\/www.sinclaircollection.site\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}