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.htmbrp {color: #333333; text-decoration: none; font-family: Verdana, Arial, Helv, Helvetica, sans-serif; font-size : 11px;}.htmbrp:link {color: #0000ff; text-decoration: none; font-family: Verdana, Arial, Helv, Helvetica, sans-serif}.htmbrp:visited {color: #800080;}.htmbrp:hover, .htmbrp:active {text-decoration: underline; }.htdirp { font-size : 12px; font-family: Verdana, Arial, Helv, Helvetica, sans-serif; color: #333333;}.htdira:link { color: #3333CC; }.htdira:visited { color: #990099; }.htdira:hover { color: #0066FF; }.htdirh1 { font-size : 20px; font-family: Verdana, Arial, Helv, Helvetica, sans-serif; color: #333333; font-weight: bold}/* CSS for aol hat - to hide nav use header_nonav.css or use header_nohat.css to hide completely */div#aol_hat {min-width: 728px; font-size:11px; font-weight:bold; z-index:200; height:30px; margin-bottom:8px; background-color:#CFD9E3;}div#aol_hat form {margin:0; }div#aol_hat ul {float:left; padding:4px 0 0 2px; height:16px; margin:0;}div#aol_hat ul li {padding:0 5px 0 0 !important; border-right:solid 1px #2864B4; line-height:11px; display:inline;}div#aol_hat ul li a {height:12px; display:inline; padding-left:5px; }div#aol_hat_form {padding-top:7px; _padding-top:3px; font-weight:normal; font-size:10px;}div#aol_hat_form input.aol_hat_button {font-size:11px; margin-top:-2px; _margin-top:0px;}div#aol_hat_form input.aol_hat_search {margin-top:-2px; _margin-top:0px; }div#aol_hat ul {padding-top:9px;}#aol_hat ul li.aol_hat_last {border:none;}#aol_hat a {color:#2864B4; background-image:none; text-decoration:none;}#aol_hat a:hover {text-decoration: underline;}#aol_hat div div {height:20px; }#aol_hat_sns div {display:inline;}#aol_hat_sns {width:auto; float:right; height:16px; text-align:right; margin:0 8px 0 0; padding:8px 0 0 0; _padding:7px 0 0 0;}#aol_hat_sns a {text-decoration:none;}#aol_hat_form {width: 300px; float:left; padding:0 0 0 12px; color:#666666;}#aol_hat input.aol_hat_search {width: 118px; height:21px; border:solid 1px #56ba24; vertical-align: middle; margin-right: 2px;}#aol_hat input.aol_hat_button {-moz-border-radius:2.5px; border-radius:2.5px; cursor:pointer; width:59px; height:21px; border:solid 1px #58B926; background-color: #D4F4C5; filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#FBFEF9,endColorStr=#BDEEA6); vertical-align: middle; font: 1.0em Tahoma,Arial,Sans-Serif;}#aol_hat input.aol_hat_button:hover {background-color:#83E839; filter:progid:filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#F9FEF7,endColorStr=#7BED46);}#aol_hat input.aol_hat_button:active {background-color:#C6FFA9; filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#99E576,endColorStr=#F5FCF1);}#content {width:auto;}The wild and wacky world of the Science of Cambridge MK14 if (navigator.userAgent.indexOf("AOL") == -1) { var sitedomain="hometown"; var siteState = "OrigUrl=" + location.href; var _sns_hostname_="my.screenname.aol.com"; // var _sns_hostname_ = "tweb33.web.aol.com"; // var _sns_hostport_ = "8000"; // var _sns_hostport_ssl_="8443"; document.write(''); _109778(); document.write('');} htmlAdWH('93212816', '728', '90');  Main _10423(); _11385(); The wild and wacky world of the Science of Cambridge MK14  The Sinclair / Science of Cambridge MK14 Web Site Last updated on 15th June 1998 by PaulRobson . Current DOS emulator version is 1.9 Quote from Sir Clive Sinclair learning of this MK14 Emulator "(Laughs)Oh dear... it gets madder and madder" (courtesy of Jim McCauley oncomp.sys.sinclair) The MK14 specification :- 1/2k ROM Monitor 256 bytes RAM (expandable to 640 bytes on board and 2170 bytes total) 8 (or 9) Red LED seven segment display. 20 key keyboard and reset switch Optional 16 I/O lines available by adding a IC No sound card (design provided) No backing store (cassette and PROM storage an optional extra) Optional VDU supporting 32x16 text or 64x64 graphics  Welcometo the days when learning to program wasn't just a matter of powering upyour PC and Hard Disk and booting a C++ Integrated Development Environment.For me, it began with the magazine "Electronics Today International" whichis still going. I was about 14 and had been subscribing for 3 or 4 yearsand was planning on being an Electronic Engineer. In the mid 1970's theyran a series about Microprocessors, largely based around the Motorola 6800.I got hooked...Trouble was, in those days, there wasn't anything much to learn on. Manyearly trainer kits got you to enter machine code, sometimes via a hexadecimalkeypad, sometimes via a bank of toggle switches. Usually, these machinesdidn't have much backing store, maybe cassette tape if you were lucky. Youwrote your programs on paper first, hand assembled them, and typed them in.Anyhow, not long after this, I got my first computer. It was called the SC/MPIntrokit. It was an SC/MP board which was designed to be connected to a serialterminal, and a set of components to make a calculator display and keyboardinto a program entry device. The replacement I/O part was all wirewrapped.I didn't know anyone else who had one then, (though I found one on the internetthe other day) in fact, I didn't know anyone else who had a "computer". Ittaught me an awful lot ... like how to write compact programs. I suspectmy dislike of 2 Mb Windows monoliths is down to this machine... and the TexasInstruments TI-57 calculator (50 program steps) which was the other halfof my Computer education (I could touch type on the calculator keyboard....)A couple of years later Clive Sinclair got into a squabble with the NationalEnterprise Board over his flat screen television , and lost the use of name"Sinclair Research". He set up "Science of Cambridge" which was later tobecome Sinclair Computers, marketing the ZX80, ZX81, Spectrum and QL. Thefirst machine of this line was the "MK14" (shown above, left, probably, youknow what browsers are like) which was basically the SC/MP Introkit witha proper circuit board and a cheaper keyboard and display (the Introkit usedcalculator parts) with some provision for extra memory and I/O. This wasdesigned by National Semiconductor, who produced the kits.It had an extra 128 bytes of RAM and a pair of I/O ports added, and provisionfor another 256 bytes of RAM (a total of 640 bytes...). It had a really duffkeyboard, the first in a long Sinclair line of duff keyboards, and a duffinitial ROM (sound familiar ?) and Sinclair thought they'd sell a coupleof thousand.They sold ten times that. According to Planet Sinclair they sold 25 timesthat... 50,000 of these kits.And that convinced Clive Sinclair to go ahead with the ZX80 design whichled to the ZX81 and Spectrum. All you guys out there who love your Speccy's- this is the wierd contraption you have to thank for it. Recent changes to this site 15-June-98 Upgraded the Emulator to v1.9 , now has support for the 32x16 Character and 64x64 Graphics VDU and a few minor enhancements. The SC/MP datasheet is available, but is still only partially transcribed. 12-June-98 Added the One armed bandit program. Changed 'C' emulator source/binaries to support no-display-on-read. Transcription of SC/MP Datasheet begun. 11-June-98 Added more software. Fixed problems with DLY opcode in emulator (operand > 64), now at version 1.8 10-June-98 Added more software from the MK14 Manual. Added emulator v1.7 with "fudge" to help display operation. 9-June-98 Added the SC-5 Symbolic Language Interpreter and Description. 4-June-98 Added PICO Basic to the software. Corrected minor erros in the PICO Basic document. Added the Sinclair Advertisment from the magazines. 3-June-98 Added PICO Basic article, and the 'C' version of the MK14 Emulator, both Source Code and Executables for DOS (Text) DOS (EGA) and Windows. On other pages on this site.... All about the MK14 Frequently Asked Questions about the MK14 Practial Electronics Review of the MK14 kit from May 1979 Sinclair's restrained Kit Description leaflet Sinclair's much less restrained advertisement Emulators for the MK14 Science of Cambridge MK14 Emulator for DOS v1.9 MK14 Emulator Source Code (for A86 Assembler) Portable MK14 Emulator Source and MSDOS Driver (for C Compilers) MK14 'C' Executables for DOS (Text) DOS (EGA) and Windows. Programming the MK14 How to program the MK14 - an introduction by Paul Robson Programming in PICO Basic by J.G. Seal SC-5 Symbolic Programming Language by Paul Robson Programs for the MK14 MK14 Software Library Technical Information MK14 SCIOS ROM [Mark 2] and Assembler tools A brief description of the SC/MP 2 Microprocessor instruction set and architecture National Semiconductor SC/MP Data Sheet (in progress) Description of the 8154 I/O Chip (very brief, to be completed) MK14 Circuit Diagram (120k download) MK14 Memory Map Parts List for Circuit Diagram Other stuff Links Page None of this would have been possible without the assistance of GrantSearle, who photocopied all his MK14 and SC/MP documentation and sent itto me, and Ian Bradbury who provided a lot (a lot !) of extra documentationand programs. The MK14 shown is courtesy of Ray Aucote, whose machine itwas. |
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