Welcome, here you will find the information taken from the original UK ZX81 ... Not Used. X1. CDA 6.5MC. 3 lead ceramic filter. Miscellaneous Components.
The Lil Old ZX81 Information Repository Intro Welcome, here you will find the information taken from the original UK ZX81 instruction assembly instructions. Please note that this document is for information purposes only :)
GRAPHICS FILES - Circuit diagram, component layout etc Click on the following descriptions to download the required file. All the files are gif, some are big so you might like to right click and download to your computer. Circuit diagram - 415k Component Layout
Regulator Heatsink Assembly Diagram
Keyboard Connector Assembly Diagram
Case Assembly
COMPONENT LIST Resistors - All 5% tolerance or better Ref Number Value Comments R1
10k
R2
680R
R3
-
R4
18k
R5
330R
R6
2k2
R7-R14
470R
R15
220k
R16-R27
1k
R28
680R
R29
1M
R30
-
Not Used
R31
-
Not Used
R32
-
Not Used
R33
4k7
R34
220R
Not Used
Resistor Packs Ref Number Value
Comments
RP1
8 x 10k 9 leads
RP2
-
RP3
5 x 10k 6 leads
Not Used
Capacitors Ref Number Value Markings
Comments
C1
47pF
47
Ceramic disc
C2
47nF
473 Z
Ceramic disc
C3
22uF
22u
Electrolytic 16V minimum
C4
47nF
473 Z
Ceramic disc
C5
1uF
1u
Electrolytic 5V minimum
C6
100pF 100, 101, n10 Ceramic disc
C7
47pF
47
Ceramic disc
C8
47nF
473 Z
Ceramic disc
C9
47nF
473 Z
Ceramic disc
C10
10nF
10n, 103
Ceramic disc
C11
47nF
473 Z
Ceramic disc
C12
47pF
47
Ceramic disc
Semiconductors Please Note - The memory is either IC4a & IC4b or IC4.
Ref Number Type
Comment
IC1
Sinclair Logic IC
40 pin
IC2
2364
24 pin
IC3
Z80A or D780C-1
40 pin
IC4
MK4118
24 pin
IC4a
uPD2114LC
18 pin
IC4b
uPD2114LC-1
18 pin
REG
7805
5 volt regulator
TR1
ZTX313
TR2
ZTX313
D1-D8
1N4448 or 1N4148 or 1S4A
D9
-
Not Used
X1
CDA 6.5MC
3 lead ceramic filter
Miscellaneous Components Modulator Type UM1233 3 off 3.5mm jack sockets for power, ear and mic. 2 off 40 pin IC sockets. Either 2 off 24 pin IC sockets or 1 off 24 pin and 2 off 18 pin IC sockets. KB1 5 way keyboard connector. KB2 8 way keyboard connector. Modulator trim (black card). Ready made flat keyboard. Aluminium heatsink. 4BA nut, bolt and washer for fixing regulator and heatsink.
Aug 9, 2009 - If you have any electronic skills you may design your own for less than 20$ ... Everything is in the README.txt file. Sources are ... Fix issue when loading more than one CD image .... Thanks to NC and my son for beta testing.
forks where the fluid flows through one or two critical points. Let's see .... Push the foot valve (157) with your fingers into the damper body (117-117A). Remove ...
3 oct. 2013 - Pour des questions matérielles, l'étude a privilégié ... partie du matériel nécessaire à l'étude. .... Application programming interface ou interface ...
you'll need to read this entire manual. It is the only way to ... Installation Shop .... High Pass S.I.P. (Series In-line Package resistor network) If you are using this.
Mar 29, 2007 - The terminal Vt100 emulation part of PSPSSH is based on the work ... his Virtual kerboard and his Vt100 stuff, and to all PSPSDK developpers. ..... The emulator faithfully imitates the C-264 (alias Commodore Plus/4) model.
These are called system variables and carry names, but do not confuse them with .... Source: ZX81 BASIC Programming by Steven Vickers, (c) Sinclair Research ...
18 mai 2016 - e mali.revenuesystems.org/desktop/desktop?workSpaceId=191198#. Référentiel en Ligne du Ministère des Mines du Mali. Direction. Nationale.
working, to prevent spoiling the Materi- als for want of ... from the Master, nor to talk of any thing impertinent or .... Honour and Safety, and no farther. And if.
A: Points can be scored from a Ruined region during both the Corruption Phase ... Q: Can the Peasant, Hero, and Noble tokens added by the Crusade Is Come ...
25 déc. 2013 - a nursing home, believing it to be his last stop. .... The television series Solsidan with Felix Herngren and Mia became a formidable success.
My mother is (+ young) than my father. 5. Today, the weather is (+ bad) than yesterday. 6. For some people, reading is (- interesting) than using a computer. 7.
Apr 3, 2014 - Try out the HTML to PDF API · HOME .... include: a larger, broader âopen bookâ headstock shape .... Harmony, but some models were also manufactured by. Regal .... This guitar appears on page I of the color photo section of.
Apr 2, 2014 - Try out the HTML to PDF API · HOME · ABOUT · AUCTIONS ... makers concentrated on craftsmanship and innovation. This. 1949 flamenco ... the decorative gold-plated trapeze tailpiece featuring an Art. Deco stair-step design, ...
Apr 2, 2014 - Try out the HTML to PDF API · HOME ... Refresh Items. Print Catalog. |. Displaying 26 - 50 of 136. All Items · Closed Items ... Page 3 ... with the volume control unit mounted to the pickguard. ..... Washburn guitars built for steel str
Robert Shaw and Peter Szego, but the engraving pattern on the rear headstock plate is different. ..... guitar with a glowing sunburst finish. Instead of the fancy.
Variation in dawn and dusk is due to the changes in sunshine duration throughout ... had at least one, usually set in a tower or gatehouse. Finally, the ring dials ...
Apr 2, 2014 - decoupage pinup girls strategically placed all over the guitar's body and neck. .... Fretboard: Ebony, Pearloid blocks inlays beginning at 3rd fret.
Apr 3, 2014 - Previous owner Frank M. Scully had his name engraved on the truss rod cover .... mother-of-pearl cloud inlays, there is little else that separates.
18 mai 2016 - C mali.revenuesystems.org/login/auth. Référentiel en Ligne du Ministère des Mines du Mali. Direction. Nationale de la Géologie et des Mines.
