{"id":21618,"date":"2025-07-09T11:33:46","date_gmt":"2025-07-09T15:33:46","guid":{"rendered":"https:\/\/carleton.ca\/scs\/?page_id=21618"},"modified":"2026-06-19T15:29:46","modified_gmt":"2026-06-19T19:29:46","slug":"vin81","status":"publish","type":"page","link":"https:\/\/carleton.ca\/scs\/vintage-computing\/item\/vin81\/","title":{"rendered":"Epson PX-8"},"content":{"rendered":"\n<section class=\"w-screen px-6 cu-section cu-section--white ml-offset-center md:px-8 lg:px-14\">\n    <div class=\"space-y-6 cu-max-w-child-5xl  md:space-y-10 cu-prose-first-last\">\n\n            <div class=\"cu-textmedia flex flex-col lg:flex-row mx-auto gap-6 md:gap-10 my-6 md:my-12 first:mt-0 max-w-5xl\">\n        <div class=\"justify-start cu-textmedia-content cu-prose-first-last\" style=\"flex: 0 0 100%;\">\n            <header class=\"font-light prose-xl cu-pageheader md:prose-2xl cu-component-updated cu-prose-first-last\">\n                                    <h1 class=\"cu-prose-first-last font-semibold !mt-2 mb-4 md:mb-6 relative after:absolute after:h-px after:bottom-0 after:bg-cu-red after:left-px text-3xl md:text-4xl lg:text-5xl lg:leading-[3.5rem] pb-5 after:w-10 text-cu-black-700 not-prose\">\n                        Epson PX-8\n                    <\/h1>\n                \n                                \n                            <\/header>\n\n                    <\/div>\n\n            <\/div>\n\n    <\/div>\n<\/section>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/carleton.ca\/scs\/vintage-computing\/item\">Vintage Computing Collection<\/a><\/div>\n<\/div>\n\n\n\n<h2 id=\"epson-px-8\" class=\"wp-block-heading\">Epson PX-8<\/h2>\n\n\n\n<p>[Vin81]<\/p>\n\n\n\n<figure class=\"wp-block-image alignright\"><a href=\"https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"300\" src=\"https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-400x300.jpg\" alt=\"Epson PX-8\" class=\"wp-image-21623\" srcset=\"https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-400x300.jpg 400w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-160x120.jpg 160w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-240x180.jpg 240w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-768x577.jpg 768w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-1536x1153.jpg 1536w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-2048x1538.jpg 2048w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-800x600.jpg 800w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_154908663-360x270.jpg 360w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/figure>\n\n\n\n<p>The Epson PX-8 &#8220;Geneva&#8221; was a pioneering portable computer from 1984, notable for its compact, laptop-style design, Z80-compatible processor, and use of a non-backlit 80-column by 8-line LCD display. Its claim to fame was running the CP\/M operating system entirely from ROM, offering a microcassette drive for storage, and supporting modular ROM cartridges for software like WordStar and dBase II, making it one of the most flexible and advanced 8-bit portables of its era. Although it struggled commercially against competitors like the TRS-80 Model 100, the PX-8 is remembered for its innovative approach to portability and expandability, and it found a niche among enthusiasts and professionals\u2014especially after price reductions\u2014cementing its place in computing history.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Manufacturer<\/strong>: Epson Corporation (Japan)<\/li>\n\n\n\n<li><strong>Type<\/strong>: Laptop<\/li>\n\n\n\n<li><strong>Model<\/strong>: PX-8<\/li>\n\n\n\n<li><strong>Release Date<\/strong>: 1984<\/li>\n\n\n\n<li><strong>Cost at release<\/strong>: USD $995&nbsp; (CAD ~$3,400 adjusted for inflation)<\/li>\n\n\n\n<li><strong>Cost with peripherals<\/strong>: USD $2,484 (CAD ~$8,500 adjusted for inflation)<\/li>\n\n\n\n<li><strong>MIPS<\/strong>: 0.3 (300 KIPS)<\/li>\n<\/ul>\n\n\n\n<h3 id=\"hardware-specifications\" class=\"wp-block-heading\"><span class=\"TextRun SCXW36078203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW36078203 BCX0\">Hardware Specifications<\/span><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CPU<\/strong>: Z80-compatible microprocessor, 2.45 MHz (some sources mention up to 4 MHz).<\/li>\n\n\n\n<li><strong>RAM<\/strong>: 64 KB standard, expandable up to 128 KB (with optional RAM disk modules).<\/li>\n\n\n\n<li><strong>ROM<\/strong>: 32 KB (expandable via ROM cartridge slots for software like WordStar, BASIC, etc.).<\/li>\n\n\n\n<li><strong>Display<\/strong>: 80-column by 8-line monochrome LCD (non-backlit); graphics mode 480 \u00d7 64 pixels.<\/li>\n\n\n\n<li><strong>Storage<\/strong>: Built-in microcassette tape drive for data storage; optional external RAM disk (64 KB or 128 KB) and external floppy disk drive.<\/li>\n\n\n\n<li><strong>Ports\/Interfaces<\/strong>: RS-232 serial, proprietary serial for disk drive or printer, analog input, bar code reader interface.<\/li>\n\n\n\n<li><strong>Power<\/strong>: Internal rechargeable nickel-cadmium battery (6\u20138 hours typical usage).<\/li>\n\n\n\n<li><strong>Sound<\/strong>: Built-in speaker (beeper).<\/li>\n\n\n\n<li><strong>Keyboard<\/strong>: Full-stroke 72-key keyboard with function and cursor keys.<\/li>\n\n\n\n<li><strong>Dimensions<\/strong>: 29.7 cm (W) \u00d7 21.6 cm (D) \u00d7 4.6 cm (H) (A4 size).<\/li>\n\n\n\n<li><strong>Weight<\/strong>: 2.3 kg (5 lbs)<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image alignright size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"300\" src=\"https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-400x300.jpg\" alt=\"Epson PX-8 with printer\" class=\"wp-image-21625\" srcset=\"https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-400x300.jpg 400w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-160x120.jpg 160w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-240x180.jpg 240w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-768x577.jpg 768w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-1536x1153.jpg 1536w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-2048x1538.jpg 2048w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-800x600.jpg 800w, https:\/\/carleton.ca\/scs\/wp-content\/uploads\/sites\/260\/PXL_20250709_165227265-360x270.jpg 360w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<h3 id=\"operating-system-programming-languages\" class=\"wp-block-heading\"><span class=\"TextRun SCXW136206418 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW136206418 BCX0\">Operating System &amp; Programming Languages<\/span><\/span><span class=\"EOP SCXW136206418 BCX0\" data-ccp-props=\"{&quot;335559685&quot;:0}\"> <\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Operating System<\/strong>: Customized version of&nbsp;<strong>CP\/M 2.2<\/strong>&nbsp;as its operating system, stored in ROM rather than on disk.<\/li>\n\n\n\n<li><strong><strong>Supported Languages:<\/strong><\/strong>\n<ul class=\"wp-block-list\">\n<li>BASIC: The PX-8 included an Epson-enhanced version of Microsoft BASIC in ROM, allowing users to write and run BASIC programs directly on the machine.<\/li>\n\n\n\n<li>CP\/M Languages: Because it ran CP\/M 2.2, the PX-8 could also run a wide variety of CP\/M-compatible languages and tools, such as:<\/li>\n\n\n\n<li>Assembler (ASM)<\/li>\n\n\n\n<li>FORTRAN<\/li>\n\n\n\n<li>COBOL<\/li>\n\n\n\n<li>Pascal<\/li>\n\n\n\n<li>C (with available CP\/M compilers)<\/li>\n\n\n\n<li>Other interpreters and utilities available for CP\/M, provided they were compatible with the PX-8\u2019s hardware and display limitations.<\/li>\n\n\n\n<li>ROM Cartridges: Additional languages and applications (such as dBase II, WordStar, and others) could be loaded via ROM cartridges, further expanding the PX-8\u2019s software capabilities<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 id=\"notables\" class=\"wp-block-heading\">Notables<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The laptop&#8217;s nickname was &#8220;Geneva.&#8221;<\/li>\n\n\n\n<li>Triple Processor Design: Featured a main Z80 CPU and additional processors in its intelligent RAM disk and ROM modules, making it unusually complex for its size.<\/li>\n\n\n\n<li>ROM Cartridge Drives: Supported swappable ROM modules for software, which appeared as virtual disk drives, users could even create their own custom ROM&#8217;s.<\/li>\n\n\n\n<li>Used a built-in microcassette tape drive for data storage, a rare choice compared to floppy disks at the time.<\/li>\n\n\n\n<li>Its external RAM disk module included its own Z80 CPU and backup battery, making it one of the earliest battery-backed RAM storage solutions.<\/li>\n\n\n\n<li>Y2K Quirk: The PX-8&#8217;s date system only accepted years from 1977 to 1999, making it &#8220;Y2K-proof&#8221; in a limited sense.<\/li>\n\n\n\n<li>Early Notebook Pioneer: Among the first true laptop computers, following Epson&#8217;s own HX-20, and notable for its CP\/M compatibility in a portable form<\/li>\n\n\n\n<li>One of the first portables to run CP\/M entirely from ROM as well as a WordStar word processor via ROM, enabling instant boot and reliability in the field<\/li>\n\n\n\n<li>Audio Playback: The microcassette drive could play voice or music through the built-in speaker<\/li>\n<\/ul>\n\n\n\n<p><strong>Donated by<\/strong>: Arlen Michaels<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/carleton.ca\/scs\/vintage-computing\/item\">Vintage Computing Collection<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Epson PX-8 [Vin81] The Epson PX-8 &#8220;Geneva&#8221; was a pioneering portable computer from 1984, notable for its compact, laptop-style design, Z80-compatible processor, and use of a non-backlit 80-column by 8-line LCD display. Its claim to fame was running the CP\/M operating system entirely from ROM, offering a microcassette drive for storage, and supporting modular ROM [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":19704,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_cu_dining_location_slug":"","footnotes":"","_links_to":"","_links_to_target":""},"cu_page_type":[90,123],"class_list":["post-21618","page","type-page","status-publish","hentry","cu_page_type-vintage-computing","cu_page_type-vintage-inventory"],"acf":{"cu_post_thumbnail":""},"_links":{"self":[{"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/pages\/21618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/comments?post=21618"}],"version-history":[{"count":5,"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/pages\/21618\/revisions"}],"predecessor-version":[{"id":24965,"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/pages\/21618\/revisions\/24965"}],"up":[{"embeddable":true,"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/pages\/19704"}],"wp:attachment":[{"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/media?parent=21618"}],"wp:term":[{"taxonomy":"cu_page_type","embeddable":true,"href":"https:\/\/carleton.ca\/scs\/wp-json\/wp\/v2\/cu_page_type?post=21618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}