SLOT SYSTEM FROM HANDY JUNK (C) 2000 Veles ------------------------------------------------------- Hello, Mikhail! I read this... number 4 of "Black Crow" and decided to write. My name is Andrey Stotsky (Ve- les), I'm 22 years old, I've been on the Spectrum since 6th grade. sa. I only read the last 2 magazines, and I really liked them. From what I I saw it - it's the best. The only remark according to number four, this is music - very irritating and harsh on the ears. B number three is much better. I do repairs and modifications There are already more SPECCY on the Donetsk radio market year and noticed one unpleasant feature - versatility - for connecting any peripherals you have to bring your computer and go into him with a soldering iron. I have even before this there was an idea to make such a design as on IBM (even from monsters you can take something good) when the controllers are ferias are inserted into special connectors. Initiallythe idea was to find exactly the same some connectors, route the board under SPECCY (Cross-board), install buffers there and use the amenities provided. By- Having reached the IBM hardware dealers, I asked about the connectors and they offered me to buy a broken one mother for 3 hryvnia and rip them out yourself. I I did so. And here the most in- interesting. Upon detailed inspection of the motherboard it turned out that everything needed was there and even more! Now I'll tell you what needs to be done, to get a normal cross-fee for SPECCY. For unsoldering slots (connectors for pin- riphery) standard KAU and SCOR- PION. Why reinvent the wheel? +-------+--+-------+ | B | | A | +-------+-------+-------+ | A15 |01| A14 | | A13 |02| A12 | | D7 |03| +5V | | BLK |04| DOS/ | | TURBO |05| F | | D0 |06| GND | | D1 |07| GND | | D2 |08| CLK | | D6 |09| A0 | | D5 |10| A1 | | D3 |11| A2 | | D4 |12| A3 || INT/ |13| IOGE/ | | NMI/ |14| GND | | HALT/ |15| RDR/ | | MREQ/ |16| RS | | IORQ/ |17|*-12V | | RD/ |18|*-5V | | WR/ |19| BRQ/ | | -- |20| RES/ | | WAIT/ |21| A7 | | -- |22| A6 | | -- |23| A5 | | M1/ |24| A4 | | RFSH/ |25| CSR/ | | A8 |26| VAK | | A10 |27| A9 | | +5V |28| A11 | | +12V |29| +5V | | GND |30| GND | +-------+-------+-------+ INT/ - can be used as an output timer signal with a period pulse duration 20 ms. RDR/ - interception point: OE ROM lock system board. CSR/ - ROM reading strobe (20+22 legs). DOS/ - TR-DOS activity (1 leg of ROM 27512). RS - select ROM bank 128/48 (27 leg ROM 27512). BLK - connecting RAM to the "0" page (D0 port #1FFD) IORQ/- read strobe from the port. IOGE/-blocking ports of subsequent layers Commodity and system board. Synchronization signals: F - 14 MHz, frequency inversion at input the first divider (counter). In- version is required, since it is necessary the correct phase of the signal is obtained. CLK - 3.5 MHz, square wave, inverse clock howl processor sequence. First you need to remove from the board everything is superfluous. Carefully solder the panels under SIMM, they can be used to distribute expanding your computer using SIMM strips 30pin. We find connectors on the board in the form pins (the full layout is given below): RESET (2pin) - resistance comes from the 1st leg torus at +5V, it is required can be left; KEBLOCK (5pin) - from the 1st leg there is a re- resistor 330 Ohm at +5V, light is connected here LED "Network"; TURBO SW - TURBO switch; TURBO LED - TURBO LED; SPEAKER - internal speaker, they must be left. Next we find the chip with the numbers 4069, space for battery and clock chip (146818, 6818, 85С168 Winbond, 5818) - all resistors, capacitors, transistors and diodes that are connected to themnecessary leave it in, delete everything else (except blocking capacitors). So- it is necessary to remove all microcircuits, of which there are more than 20 legs, and it is necessary We must ensure that on the contact surfaces pads to which microcircuits were soldered, there was no "snot". If you have a drive controller on a separate board, and you have a desire to install to set it up as a slot, then you need to do this: or remove one of the connectors for the slots (or preferably extreme and closer to SIMMam). After all of the above, the fee ready for assembly. Now it is necessary to ref- take all the food that comes to slots: +12V, +5V, -12V, -5V, COMMON; yes how its location doesn't match KAU and SCORPION slots. If the board is multi- layer (usually 4), then the inner layers this is +5V and GENERAL. In this case it is necessary Carefully, without damaging, remove the contacts B1, B3, B10 and B29 in all slots (see Fig. chest), drill out the holes with a drill 1.2 mm and insert the contacts into place. For reliable isolation of the legs from the internal layers they must be covered with heat-resistant cue cambric or heat-resistant insulation with wires The drill diameter is chosen so that - the insulation would fit freely into the hole, but the conductors on the board were not damaged, passing next to the leg. After that it is necessary to connect the correspondinglegs each slot, and also duplicate wire 0.12-0.15 mm power contacts: A3, A6, A7, A14, A29 and B28. In every word connect contacts B31 with each other, B30 and A30. All printed conductors, which that fit the slots must be removed to avoid problems. +------------------------+ +-+++ +----SIMM------+ | |1||| +--------------+ | +-+|| +----SIMM------+ | | || +--------------+ | | |2 | | ++ | |A1 A31 | |+----SLOT1------+------+ | |B1-----------B31------+ | |+----SLOT2------+------+ | |+---------------+------+ | |+----SLOT3------+------+ | |+---------------+------+ | |+----SLOT4------+------+ | |+---------------+------+ | |+----SLOT5------+------+ | |+---------------+------+ | |+----SLOT6------+------+ | |+---------------+------+ | +------------------------+ 1 - connector for connecting a keyboard 2 - power connector Likewiselet's do it with two next to each other standing rulers SIMMob, they have drilled pour legs 1, 9, 24 and 30. In place of SIMMa it is necessary to solder the connector SNPS8-64 male (with pins) this way. +------+ +-----+ | | | |SNPS8-64 | |SLOT +-----+ | | ++ ++ | | || || | | +++-+++ | | | +---+ | | ++----++ +----+|+---+|+-----+ +---+|+--+|+------ +----+|+---+|+-----+ +---+|+--+|+------ A B | | A B The wiring of the SNPS8-64 connector should be completely closely match the slot layout. This will allow to unify Cross-boards, replace them without using pa- yowl and use a cross-board from any battle of the Spectruma model with any system connector. To do this, a MALE CONNECTOR is required dimo PUT IN THE CROSS BOARD AND SOLDER IN IN ACCORDANCE WITH THE SLOT LAYOUT. After this we collect the following diagram. Most of the chips are already in place on the board, you just need to cut off all the under- printed conductors going to them. Hello do imported analogues of our microcircuits, which which are needed forschemes and can meet on board: APS 7ХXX244 APb 7CHXX245 LAZ 7ХXXOO LL1 7ХXXЗ2 LA2 7ХXXЗO LN1 7ХXXOCХ ID7 7ХXX138 LE1 7ХXXO2 TM2 7ХXX74 (Some of the chips are used for CMOS hours) where XX is the series of the microcircuit missing 155 S 531 LS 555 ALS 1533 F 1531 +═════════════ ════════++════════════════+ | | | | +---+ | +--+---+--+ | |DO`--1+& | |DO---18|O | | O|2---DO`+ |D1`--2+ | |D1---17|1 | | 1|3---D1`+ |D2`--3+ | +---+ |D2---16|2 | | 2|4---D2`+ |D3`--4+ o8+12+& o11-+ |D3---15|3 | | 3|5---D3`+ |D4`--5+ | +13+LAZ| ||D4---14|4 | | 4|6---D4`+ |D5`--6+ | +---+ | |D5---13|5 | | 5|7---D5`+ |D6`-11+ | | |D6---12|6 | | 6|8---D6`+ |D7`-12+LA2| | |D7---11|7 | | 7|9---D7`+ | +---+ | | +--+ | | | | +-----------------+ +WR/---1|SA| | | | | | +---+ +---+ +---+ +-19oOE|APb| | | | +-1+1 |3---1+& |3-+4+& |6-----+ +--+---+--+ | |RD/---2+LL1| +-2+LAZ| +5+LAZ| | | +---+ | +---+ +---+ | |WR/-----------+ | +=========================+==========================+=======+ | +--+---+--+ | +--+---+--+ | |AO----2|O | | O|18--AO`+A8----2|O | | O|18--A8`+ |A1----4|1 | | 1|16--A1`+A9----4|1 | | 1|16--A9`+ |A2----6|2 | | 2|14--A2`+A1O---6|2 | | 2|14-A1O`+ |A3----8|3 | | 3|12--A3`+A11---8|3 | | 3|12-A11`+ |A12--11|4 | | 4|9--A12`+A4---11|4 | | 4|9---A4`+ |A13--13|5 | | 5|7--A13`+A5---13|5 | | 5|7---A5`+ |A14--15|6 | | 6|5--A14`+A6---15|6 | | 6|5---A6`+ |A15--17|7 | | 7|3--A15`+A7---17|7 | | 7|3---A7`+ | +--+ | | | +--+ | | | +--1|SA|| | | +--1|SA| | | | +-19oOE|APS| | | +-19oOE|APS| | | GND +--+---+--+ | GND +--+---+--+ | | | +--+---+--+ | 4.7-1OkOi |F ---18|O | | O|2--- F`+DO`--###-+ |RD/--17|1 | | 1|3--RD/`+D1`--###-+ |WR/--16|2 | | 2|4--WR/`+D2`--###-+ |MREQ/15|3 | | 3|5MREQ/`+D3`--###-+ |M1/--14|4 | | 4|6--M1/`+D4`--###-+ |VAK/-13|5 | | 5|7-VAK/`+D5`--###-+ |HLT/-12|6 | | 6|8-HLT/`+D6`--###-+ |RFSH/11|7 | | 7|9RFSH/`+D7`--###-+-+5V | +--+ | | | | +5V--1|SA| | | +===================================+ | GND-19oOE|APb| | | | +--+---+--+ | | | | | | SLOT 1 SLOT 2 SLOT 6 | | | | I I I I I I | | O O O OО О | | R G R G R G | | Q E Q E Q E | | / / / / / / | | | | | | | | | | | +###-GND | +###-GND | +###-GND | | | | +---+ | | +---+ | | +---+ IOGE/| |IORQ/ | +1+1 |3 | +4+1 |6+ | +1+1 |3-------+ |------+--2+ЛЛ1| --+--5+ЛЛ1| +- - - - - - --+--2+ЛЛ1| | | +---+ +---+ +---+ | | | | | | SLOT 1 SLOT 2 SLOT 6 | | | | C R C R C R | | S D S D S D | | R R R R R R | | / / / / / / | | | | | | | | | | | +###-GND | +###-GND | +###-GND | | | | +---+ | | +---+ | | +---+ RDR/| |CSR/ | +1+1 |3 | +4+1 |6+ | +1+1 |3-------++------+--2+LL1| --+--5+LL1| +- - - - - - --+--2+LL1| +---+ +---+ +---+ All resistors 820 Ohm - 1 kOhm Resistor assemblies can also be found at board With a dot - general conclusion, the first two numbers are the meaning, the third is mono- tel 10 to the power (103 - 1OkOhm, 472 - 4.7 kOhm). Buffer chips APS and APb must be best series 1531, since you- the passages of these microcircuits have a large load precise ability, and their speed is even higher than that of the 1533 series. Or you can turn 555, but problems may arise in turbo mode. Series 1533 cannot be installed, since they are very low-power. It is better to install the remaining microcircuits 1533 or 1531, but 555 is also possible. Signals marked "`" are output to slot connectors. The CLK signal is needed directly on the board pass the computer through the inverter and only after that feed into the train on Cross-fee. The TURBO line (B5) must be connected to free leg of the TUR-pin connector VO_SW on the Cross-board (the second leg is usually goes to GENERAL, but worth checking). Line RES/ (A20) must be connected to free leg of the RESET pin connector on the Cross board (the second leg usually goes to GENERAL).The TURBO_LED pin connector is required can be installed on a computer board (if there is a turbo). We send a signal to it from the transmitter howl of the legs of the multiplexer, which switches calculates the processor frequency via a buffer element. Such connectors are convenient to use, but This is most useful when installing in IBM case (for example Mini ToWer) - all housing connectors are inserted in accordance with appropriate computer connectors and Cross boards. Power is supplied to the computer by via a Cross-board, where it is inserted chassis power supply connector. Keyboard connector on Cross-board also used for its intended purpose. Required dimo cut off all printed conductors, which go to it and solder to the next one cable with a connector that is inserted to the controller card XT_Keyboard & MS_My- se. 1-----+ +---1 mark 4---+ +---2 DIN 2--╬═══════════╬---3 5---+ +---4 3-----+ +---5 mate for pins You also need to turn the diode on the pi- tanning of the clock chip that goes to 4-pin connector forexternal bata- rey, then you can paste here power connector for static chips pa- crumples or similar things on cards (for example CACHa card). Now I’ll explain a little how the circuit works. data bus buffer management. Transfer signals from the processor to the OS slots always occurs when the signal is active WR/ (active zero). But during transmission signals from slots may conflict situation as a result of the fact that the answer the device can be located either in a slot, and on a computer board (for example, Kempston joystick, ROM). So just Transmission cannot be enabled using the RD/ signal. To resolve this conflict, the scheme assembled on LA2, LAZ and one element LL1. If none of the cards are from turned to RD/, then the data bus is in log state "1" (resistor tightened) rummy to +5V), inverting the signal from output LA2 in this case we get "1", which prohibits the passage of RD/ through LL1 and thereby prohibits the transmission of data ny from slots to the processor. If some card answered and at least one If the data is zero, then LL1 will receive “0” and will allow the passage of RD/, which in in turn will allow the passage of data from slots to processor. This circuit is necessary to eliminate dependenciesslots from the IORQ/ signal, those Now it is possible to install ROM as in a computer ter and slot, direct access is possible to memory with cards installed in the slots. Now another useful thing that may be on an IBM motherboard, now already turned into a Cross-board - this is a mic CMOS clock circuit diagram (see above). By the layout of the legs is completely similar 512VI1, but the action of the 13th leg carried how much is different - when applying to it log. "0" it outputs its data outputs from the third state (Z) and on the data bus conflict results, and the whole system hangs. Therefore, the GLUK scheme requires we can make the following changes: between Install the CMOS clock and data bus fer on APb. On the Cross-board this chip already standing and even connected with all the data with CMOS clock chip. You just need connect the second pins to the data bus and assemble a control circuit. Now some tips. To unsolder the SIMM or connector under slot I do this: install the board down the elements so that under the slots there was space left and warming up each knife - Ok, I press the protruding part into the board. WITHthe reverse side appears sticking out edge, the leg can be pulled out completely from it shield. Before drilling the hole is better clear the solder, then you get an accurate there is no displacement. Be careful and Do not drill out the connector itself. When wiring card boards, you must use use all power contacts, while there is no need to connect the entire earth or +5V on the card to each other, they will connect through the slot connector.
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