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F/+HINT5
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_30.ADF |
| Filename: | F/+HINT5 |
| Read OK: | ✔ |
| File size: | 1133 bytes |
| Load address: | 2B204556 |
| Exec address: | 544E4948 |
File contents
0V (pins 7,8,47,48) Ground. Expansion modules with their own power supply must have the 0V lines commoned with the Electron. +5V (pins 9,10,49,50) A +5V supply from the Electron. Up to 500mA (total) may safely be drawn from this line by expansion modules as long as no power is taken from 18V AC (pins 1,2,3,4). SOUND O/P (pin 11) Sound output. A 3V peak to peak source via a 1K series resistor from the Electron ULA. 16 MHz (pin 12) 16 Megahertz from the Electron main oscillator. This output may be used for clock generation within an expansion module. /13 IN (pin 13) 16 Megahertz divided by 13. This output may be used for baud rate generation. If divided by 1024 it will give approximately 1200Hz. PHI OUT (pin 14) The 6502 input clock. The low time is nominally 250ns. The high time may be 250ns (2MHz operation when reading ROMs) or 750ns or 1250ns (stretched clock for a 1MHz access, the length depending on the phase of the 2MHz clock) or up to 40us (if in modes 0-3). For further details see Section 4. RST (pin 15) Reset (active low). This is an OUTPUT ONLY for the system reset line. It may be used to initialise expansion modules on power up and when the BREAK key is pressed. NMI (pin 16) Non-Maskable Interrupt (negative edge triggered). This is the system NMI line which is open collector (wire-OR) and may be asserted by an expansion module. The pull-up resistor on this line inside the ULA is 3k3. Care must be taken to avoid masking other interrupts by holding the line low. Using NMI on the Electron requires knowledge of operating system protocols. IRQ (pin 17) Interrupt Request (active low). This is the system IRQ line which is open collector (wire-OR) and may be asserted by an expansion module. The pull-up resistor on this line inside the ULA is 3k3. It is essential for the correct operation of the machine that interrupts to not occur until the software is capable of dealing with them. Interrupts on the Electron expansion bus should therefore be disabled on power-up and reset. Significant use of interrupt service time may affect other machine functions, eg the real time clock. For further details see Section 4. R/W (pin 18) The system read/write line from the 6502. D7-D0 (pins 19-26) Bi-directional data bus. The direction of data is determined by R/W. RDY (pin 27) 6502 ready line (active low). May be asserted by an expansion module to stop the processor when reading slow memory. This line works on read only (R/W=1). (pin 28) No connection (pins 29,30) Polarising key connector. A0-A15 (pins 31-46) 6502 address bus. 3.0 Power Supply Electron power supply: Note carefully: instructions supplied with any expansion unit must state that all power supplied to the Electron and the expansion unit must be turned off before the expansion module is connected to or disconnected from the Electron. The Electron power supply may be used to power expansion modules to a total of 500mA drawn from the +5V terminal on the expansion connector, and 20mA from the -5V terminal. THESE ARE TOTAL FIGURES FOR ALL EXPANSION UNITS COMBINED. The 18V AC terminals on the expansion connector may be used to drive a low voltage power supply in the expansion module, but the total power drawn from the Electron mains power adaptor must never exceed 14 watts (worst case). If no power is being drawn by the expansion unit from the Electron's +5V supply then 6W may safely be drawn from the 18V AC lines on the expansion connector. The thermal fuse in the mains power adaptor is blown irretrievably if these values are exceeded. Expansion power supply: To accommodate expansion modules and combinations of modules which require more current, a separate power supply must be used. When this is done, the 0V rail of the expansion module must be connected to the 0V terminal of the Electron expansion connector. The +5V rail and the -5V rail (if implemented) must remain isolated from the Electron. On no account should an expansion module power supply be designated to drive the Electron's 18V AC lines. This could create a conflict with the Electron's own AC supply, and would be extremely dangerous if the Electron's mains power transformer were plugged into the Electron when disconnected from the mains.
00000000 0d 30 56 20 28 70 69 6e 73 20 37 2c 38 2c 34 37 |.0V (pins 7,8,47| 00000010 2c 34 38 29 20 20 20 20 20 47 72 6f 75 6e 64 2e |,48) Ground.| 00000020 20 20 45 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 | Expansion modu| 00000030 6c 65 73 20 77 69 74 68 20 74 68 65 69 72 20 6f |les with their o| 00000040 77 6e 20 70 6f 77 65 72 0d 73 75 70 70 6c 79 20 |wn power.supply | 00000050 6d 75 73 74 20 68 61 76 65 20 74 68 65 20 30 56 |must have the 0V| 00000060 20 6c 69 6e 65 73 20 63 6f 6d 6d 6f 6e 65 64 20 | lines commoned | 00000070 77 69 74 68 20 74 68 65 20 45 6c 65 63 74 72 6f |with the Electro| 00000080 6e 2e 0d 0d 2b 35 56 20 28 70 69 6e 73 20 39 2c |n...+5V (pins 9,| 00000090 31 30 2c 34 39 2c 35 30 29 20 20 20 41 20 2b 35 |10,49,50) A +5| 000000a0 56 20 73 75 70 70 6c 79 20 66 72 6f 6d 20 74 68 |V supply from th| 000000b0 65 20 45 6c 65 63 74 72 6f 6e 2e 20 20 55 70 20 |e Electron. Up | 000000c0 74 6f 20 35 30 30 6d 41 0d 28 74 6f 74 61 6c 29 |to 500mA.(total)| 000000d0 20 6d 61 79 20 73 61 66 65 6c 79 20 62 65 20 64 | may safely be d| 000000e0 72 61 77 6e 20 66 72 6f 6d 20 74 68 69 73 20 6c |rawn from this l| 000000f0 69 6e 65 20 62 79 20 65 78 70 61 6e 73 69 6f 6e |ine by expansion| 00000100 20 6d 6f 64 75 6c 65 73 20 61 73 20 6c 6f 6e 67 | modules as long| 00000110 20 61 73 0d 6e 6f 20 70 6f 77 65 72 20 69 73 20 | as.no power is | 00000120 74 61 6b 65 6e 20 66 72 6f 6d 20 31 38 56 20 41 |taken from 18V A| 00000130 43 20 28 70 69 6e 73 20 31 2c 32 2c 33 2c 34 29 |C (pins 1,2,3,4)| 00000140 2e 0d 0d 53 4f 55 4e 44 20 4f 2f 50 20 28 70 69 |...SOUND O/P (pi| 00000150 6e 20 31 31 29 20 20 20 20 20 20 53 6f 75 6e 64 |n 11) Sound| 00000160 20 6f 75 74 70 75 74 2e 20 20 41 20 33 56 20 70 | output. A 3V p| 00000170 65 61 6b 20 74 6f 20 70 65 61 6b 20 73 6f 75 72 |eak to peak sour| 00000180 63 65 20 76 69 61 20 61 20 31 4b 0d 73 65 72 69 |ce via a 1K.seri| 00000190 65 73 20 72 65 73 69 73 74 6f 72 20 66 72 6f 6d |es resistor from| 000001a0 20 74 68 65 20 45 6c 65 63 74 72 6f 6e 20 55 4c | the Electron UL| 000001b0 41 2e 0d 0d 31 36 20 4d 48 7a 20 28 70 69 6e 20 |A...16 MHz (pin | 000001c0 31 32 29 20 20 20 20 20 20 20 20 20 31 36 20 4d |12) 16 M| 000001d0 65 67 61 68 65 72 74 7a 20 66 72 6f 6d 20 74 68 |egahertz from th| 000001e0 65 20 45 6c 65 63 74 72 6f 6e 20 6d 61 69 6e 20 |e Electron main | 000001f0 6f 73 63 69 6c 6c 61 74 6f 72 2e 20 0d 54 68 69 |oscillator. .Thi| 00000200 73 20 6f 75 74 70 75 74 20 6d 61 79 20 62 65 20 |s output may be | 00000210 75 73 65 64 20 66 6f 72 20 63 6c 6f 63 6b 20 67 |used for clock g| 00000220 65 6e 65 72 61 74 69 6f 6e 20 77 69 74 68 69 6e |eneration within| 00000230 20 61 6e 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f | an expansion mo| 00000240 64 75 6c 65 2e 0d 0d 2f 31 33 20 49 4e 20 28 70 |dule.../13 IN (p| 00000250 69 6e 20 31 33 29 20 20 20 20 20 20 20 20 20 31 |in 13) 1| 00000260 36 20 4d 65 67 61 68 65 72 74 7a 20 64 69 76 69 |6 Megahertz divi| 00000270 64 65 64 20 62 79 20 31 33 2e 20 20 54 68 69 73 |ded by 13. This| 00000280 20 6f 75 74 70 75 74 20 6d 61 79 20 62 65 0d 75 | output may be.u| 00000290 73 65 64 20 66 6f 72 20 62 61 75 64 20 72 61 74 |sed for baud rat| 000002a0 65 20 67 65 6e 65 72 61 74 69 6f 6e 2e 20 20 49 |e generation. I| 000002b0 66 20 64 69 76 69 64 65 64 20 62 79 20 31 30 32 |f divided by 102| 000002c0 34 20 69 74 20 77 69 6c 6c 20 67 69 76 65 0d 61 |4 it will give.a| 000002d0 70 70 72 6f 78 69 6d 61 74 65 6c 79 20 31 32 30 |pproximately 120| 000002e0 30 48 7a 2e 0d 0d 50 48 49 20 4f 55 54 20 28 70 |0Hz...PHI OUT (p| 000002f0 69 6e 20 31 34 29 20 20 20 20 20 20 20 20 54 68 |in 14) Th| 00000300 65 20 36 35 30 32 20 69 6e 70 75 74 20 63 6c 6f |e 6502 input clo| 00000310 63 6b 2e 20 20 54 68 65 20 6c 6f 77 20 74 69 6d |ck. The low tim| 00000320 65 20 69 73 20 6e 6f 6d 69 6e 61 6c 6c 79 0d 32 |e is nominally.2| 00000330 35 30 6e 73 2e 20 20 54 68 65 20 68 69 67 68 20 |50ns. The high | 00000340 74 69 6d 65 20 6d 61 79 20 62 65 20 32 35 30 6e |time may be 250n| 00000350 73 20 28 32 4d 48 7a 20 6f 70 65 72 61 74 69 6f |s (2MHz operatio| 00000360 6e 20 77 68 65 6e 20 72 65 61 64 69 6e 67 20 52 |n when reading R| 00000370 4f 4d 73 29 20 6f 72 0d 37 35 30 6e 73 20 6f 72 |OMs) or.750ns or| 00000380 20 31 32 35 30 6e 73 20 28 73 74 72 65 74 63 68 | 1250ns (stretch| 00000390 65 64 20 63 6c 6f 63 6b 20 66 6f 72 20 61 20 31 |ed clock for a 1| 000003a0 4d 48 7a 20 61 63 63 65 73 73 2c 20 74 68 65 20 |MHz access, the | 000003b0 6c 65 6e 67 74 68 20 64 65 70 65 6e 64 69 6e 67 |length depending| 000003c0 0d 6f 6e 20 74 68 65 20 70 68 61 73 65 20 6f 66 |.on the phase of| 000003d0 20 74 68 65 20 32 4d 48 7a 20 63 6c 6f 63 6b 29 | the 2MHz clock)| 000003e0 20 6f 72 20 75 70 20 74 6f 20 34 30 75 73 20 28 | or up to 40us (| 000003f0 69 66 20 69 6e 20 6d 6f 64 65 73 20 30 2d 33 29 |if in modes 0-3)| 00000400 2e 20 20 46 6f 72 0d 66 75 72 74 68 65 72 20 64 |. For.further d| 00000410 65 74 61 69 6c 73 20 73 65 65 20 53 65 63 74 69 |etails see Secti| 00000420 6f 6e 20 34 2e 0d 0d 52 53 54 20 28 70 69 6e 20 |on 4...RST (pin | 00000430 31 35 29 20 20 20 20 20 20 20 20 20 20 20 20 52 |15) R| 00000440 65 73 65 74 20 28 61 63 74 69 76 65 20 6c 6f 77 |eset (active low| 00000450 29 2e 20 20 54 68 69 73 20 69 73 20 61 6e 20 4f |). This is an O| 00000460 55 54 50 55 54 20 4f 4e 4c 59 20 66 6f 72 0d 74 |UTPUT ONLY for.t| 00000470 68 65 20 73 79 73 74 65 6d 20 72 65 73 65 74 20 |he system reset | 00000480 6c 69 6e 65 2e 20 20 49 74 20 6d 61 79 20 62 65 |line. It may be| 00000490 20 75 73 65 64 20 74 6f 20 69 6e 69 74 69 61 6c | used to initial| 000004a0 69 73 65 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f |ise expansion mo| 000004b0 64 75 6c 65 73 20 6f 6e 0d 70 6f 77 65 72 20 75 |dules on.power u| 000004c0 70 20 61 6e 64 20 77 68 65 6e 20 74 68 65 20 42 |p and when the B| 000004d0 52 45 41 4b 20 6b 65 79 20 69 73 20 70 72 65 73 |REAK key is pres| 000004e0 73 65 64 2e 0d 0d 4e 4d 49 20 28 70 69 6e 20 31 |sed...NMI (pin 1| 000004f0 36 29 20 20 20 20 20 20 20 20 20 20 20 20 4e 6f |6) No| 00000500 6e 2d 4d 61 73 6b 61 62 6c 65 20 49 6e 74 65 72 |n-Maskable Inter| 00000510 72 75 70 74 20 28 6e 65 67 61 74 69 76 65 20 65 |rupt (negative e| 00000520 64 67 65 20 74 72 69 67 67 65 72 65 64 29 2e 20 |dge triggered). | 00000530 0d 54 68 69 73 20 69 73 20 74 68 65 20 73 79 73 |.This is the sys| 00000540 74 65 6d 20 4e 4d 49 20 6c 69 6e 65 20 77 68 69 |tem NMI line whi| 00000550 63 68 20 69 73 20 6f 70 65 6e 20 63 6f 6c 6c 65 |ch is open colle| 00000560 63 74 6f 72 20 28 77 69 72 65 2d 4f 52 29 20 61 |ctor (wire-OR) a| 00000570 6e 64 20 6d 61 79 20 62 65 0d 61 73 73 65 72 74 |nd may be.assert| 00000580 65 64 20 62 79 20 61 6e 20 65 78 70 61 6e 73 69 |ed by an expansi| 00000590 6f 6e 20 6d 6f 64 75 6c 65 2e 20 20 54 68 65 20 |on module. The | 000005a0 70 75 6c 6c 2d 75 70 20 72 65 73 69 73 74 6f 72 |pull-up resistor| 000005b0 20 6f 6e 20 74 68 69 73 20 6c 69 6e 65 20 69 6e | on this line in| 000005c0 73 69 64 65 0d 74 68 65 20 55 4c 41 20 69 73 20 |side.the ULA is | 000005d0 33 6b 33 2e 20 20 43 61 72 65 20 6d 75 73 74 20 |3k3. Care must | 000005e0 62 65 20 74 61 6b 65 6e 20 74 6f 20 61 76 6f 69 |be taken to avoi| 000005f0 64 20 6d 61 73 6b 69 6e 67 20 6f 74 68 65 72 20 |d masking other | 00000600 69 6e 74 65 72 72 75 70 74 73 20 62 79 0d 68 6f |interrupts by.ho| 00000610 6c 64 69 6e 67 20 74 68 65 20 6c 69 6e 65 20 6c |lding the line l| 00000620 6f 77 2e 20 20 55 73 69 6e 67 20 4e 4d 49 20 6f |ow. Using NMI o| 00000630 6e 20 74 68 65 20 45 6c 65 63 74 72 6f 6e 20 72 |n the Electron r| 00000640 65 71 75 69 72 65 73 20 6b 6e 6f 77 6c 65 64 67 |equires knowledg| 00000650 65 20 6f 66 0d 6f 70 65 72 61 74 69 6e 67 20 73 |e of.operating s| 00000660 79 73 74 65 6d 20 70 72 6f 74 6f 63 6f 6c 73 2e |ystem protocols.| 00000670 0d 0d 49 52 51 20 28 70 69 6e 20 31 37 29 20 20 |..IRQ (pin 17) | 00000680 20 20 20 20 20 20 20 20 20 20 49 6e 74 65 72 72 | Interr| 00000690 75 70 74 20 52 65 71 75 65 73 74 20 28 61 63 74 |upt Request (act| 000006a0 69 76 65 20 6c 6f 77 29 2e 20 20 54 68 69 73 20 |ive low). This | 000006b0 69 73 20 74 68 65 0d 73 79 73 74 65 6d 20 49 52 |is the.system IR| 000006c0 51 20 6c 69 6e 65 20 77 68 69 63 68 20 69 73 20 |Q line which is | 000006d0 6f 70 65 6e 20 63 6f 6c 6c 65 63 74 6f 72 20 28 |open collector (| 000006e0 77 69 72 65 2d 4f 52 29 20 61 6e 64 20 6d 61 79 |wire-OR) and may| 000006f0 20 62 65 20 61 73 73 65 72 74 65 64 20 62 79 0d | be asserted by.| 00000700 61 6e 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 |an expansion mod| 00000710 75 6c 65 2e 20 20 54 68 65 20 70 75 6c 6c 2d 75 |ule. The pull-u| 00000720 70 20 72 65 73 69 73 74 6f 72 20 6f 6e 20 74 68 |p resistor on th| 00000730 69 73 20 6c 69 6e 65 20 69 6e 73 69 64 65 20 74 |is line inside t| 00000740 68 65 20 55 4c 41 20 69 73 0d 33 6b 33 2e 20 20 |he ULA is.3k3. | 00000750 49 74 20 69 73 20 65 73 73 65 6e 74 69 61 6c 20 |It is essential | 00000760 66 6f 72 20 74 68 65 20 63 6f 72 72 65 63 74 20 |for the correct | 00000770 6f 70 65 72 61 74 69 6f 6e 20 6f 66 20 74 68 65 |operation of the| 00000780 20 6d 61 63 68 69 6e 65 20 74 68 61 74 0d 69 6e | machine that.in| 00000790 74 65 72 72 75 70 74 73 20 74 6f 20 6e 6f 74 20 |terrupts to not | 000007a0 6f 63 63 75 72 20 75 6e 74 69 6c 20 74 68 65 20 |occur until the | 000007b0 73 6f 66 74 77 61 72 65 20 69 73 20 63 61 70 61 |software is capa| 000007c0 62 6c 65 20 6f 66 20 64 65 61 6c 69 6e 67 20 77 |ble of dealing w| 000007d0 69 74 68 0d 74 68 65 6d 2e 20 20 49 6e 74 65 72 |ith.them. Inter| 000007e0 72 75 70 74 73 20 6f 6e 20 74 68 65 20 45 6c 65 |rupts on the Ele| 000007f0 63 74 72 6f 6e 20 65 78 70 61 6e 73 69 6f 6e 20 |ctron expansion | 00000800 62 75 73 20 73 68 6f 75 6c 64 20 74 68 65 72 65 |bus should there| 00000810 66 6f 72 65 20 62 65 0d 64 69 73 61 62 6c 65 64 |fore be.disabled| 00000820 20 6f 6e 20 70 6f 77 65 72 2d 75 70 20 61 6e 64 | on power-up and| 00000830 20 72 65 73 65 74 2e 20 20 53 69 67 6e 69 66 69 | reset. Signifi| 00000840 63 61 6e 74 20 75 73 65 20 6f 66 20 69 6e 74 65 |cant use of inte| 00000850 72 72 75 70 74 20 73 65 72 76 69 63 65 20 74 69 |rrupt service ti| 00000860 6d 65 0d 6d 61 79 20 61 66 66 65 63 74 20 6f 74 |me.may affect ot| 00000870 68 65 72 20 6d 61 63 68 69 6e 65 20 66 75 6e 63 |her machine func| 00000880 74 69 6f 6e 73 2c 20 65 67 20 74 68 65 20 72 65 |tions, eg the re| 00000890 61 6c 20 74 69 6d 65 20 63 6c 6f 63 6b 2e 20 20 |al time clock. | 000008a0 46 6f 72 20 66 75 72 74 68 65 72 0d 64 65 74 61 |For further.deta| 000008b0 69 6c 73 20 73 65 65 20 53 65 63 74 69 6f 6e 20 |ils see Section | 000008c0 34 2e 0d 0d 52 2f 57 20 28 70 69 6e 20 31 38 29 |4...R/W (pin 18)| 000008d0 20 20 20 20 20 20 20 20 20 20 20 20 54 68 65 20 | The | 000008e0 73 79 73 74 65 6d 20 72 65 61 64 2f 77 72 69 74 |system read/writ| 000008f0 65 20 6c 69 6e 65 20 66 72 6f 6d 20 74 68 65 20 |e line from the | 00000900 36 35 30 32 2e 0d 0d 44 37 2d 44 30 20 28 70 69 |6502...D7-D0 (pi| 00000910 6e 73 20 31 39 2d 32 36 29 20 20 20 20 20 20 42 |ns 19-26) B| 00000920 69 2d 64 69 72 65 63 74 69 6f 6e 61 6c 20 64 61 |i-directional da| 00000930 74 61 20 62 75 73 2e 20 20 54 68 65 20 64 69 72 |ta bus. The dir| 00000940 65 63 74 69 6f 6e 20 6f 66 20 64 61 74 61 20 69 |ection of data i| 00000950 73 0d 64 65 74 65 72 6d 69 6e 65 64 20 62 79 20 |s.determined by | 00000960 52 2f 57 2e 0d 0d 52 44 59 20 28 70 69 6e 20 32 |R/W...RDY (pin 2| 00000970 37 29 20 20 20 20 20 20 20 20 20 20 20 20 36 35 |7) 65| 00000980 30 32 20 72 65 61 64 79 20 6c 69 6e 65 20 28 61 |02 ready line (a| 00000990 63 74 69 76 65 20 6c 6f 77 29 2e 20 20 4d 61 79 |ctive low). May| 000009a0 20 62 65 20 61 73 73 65 72 74 65 64 20 62 79 0d | be asserted by.| 000009b0 61 6e 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 |an expansion mod| 000009c0 75 6c 65 20 74 6f 20 73 74 6f 70 20 74 68 65 20 |ule to stop the | 000009d0 70 72 6f 63 65 73 73 6f 72 20 77 68 65 6e 20 72 |processor when r| 000009e0 65 61 64 69 6e 67 20 73 6c 6f 77 20 6d 65 6d 6f |eading slow memo| 000009f0 72 79 2e 20 20 54 68 69 73 0d 6c 69 6e 65 20 77 |ry. This.line w| 00000a00 6f 72 6b 73 20 6f 6e 20 72 65 61 64 20 6f 6e 6c |orks on read onl| 00000a10 79 20 28 52 2f 57 3d 31 29 2e 0d 0d 28 70 69 6e |y (R/W=1)...(pin| 00000a20 20 32 38 29 20 20 20 20 20 20 20 20 20 20 20 20 | 28) | 00000a30 20 20 20 20 4e 6f 20 63 6f 6e 6e 65 63 74 69 6f | No connectio| 00000a40 6e 0d 0d 28 70 69 6e 73 20 32 39 2c 33 30 29 20 |n..(pins 29,30) | 00000a50 20 20 20 20 20 20 20 20 20 20 20 50 6f 6c 61 72 | Polar| 00000a60 69 73 69 6e 67 20 6b 65 79 20 63 6f 6e 6e 65 63 |ising key connec| 00000a70 74 6f 72 2e 0d 0d 41 30 2d 41 31 35 20 28 70 69 |tor...A0-A15 (pi| 00000a80 6e 73 20 33 31 2d 34 36 29 20 20 20 20 20 36 35 |ns 31-46) 65| 00000a90 30 32 20 61 64 64 72 65 73 73 20 62 75 73 2e 0d |02 address bus..| 00000aa0 0d 0d 0d 33 2e 30 20 20 50 6f 77 65 72 20 53 75 |...3.0 Power Su| 00000ab0 70 70 6c 79 0d 0d 45 6c 65 63 74 72 6f 6e 20 70 |pply..Electron p| 00000ac0 6f 77 65 72 20 73 75 70 70 6c 79 3a 0d 0d 4e 6f |ower supply:..No| 00000ad0 74 65 20 63 61 72 65 66 75 6c 6c 79 3a 20 20 69 |te carefully: i| 00000ae0 6e 73 74 72 75 63 74 69 6f 6e 73 20 73 75 70 70 |nstructions supp| 00000af0 6c 69 65 64 20 77 69 74 68 20 61 6e 79 20 65 78 |lied with any ex| 00000b00 70 61 6e 73 69 6f 6e 20 75 6e 69 74 20 6d 75 73 |pansion unit mus| 00000b10 74 20 73 74 61 74 65 0d 74 68 61 74 20 61 6c 6c |t state.that all| 00000b20 20 70 6f 77 65 72 20 73 75 70 70 6c 69 65 64 20 | power supplied | 00000b30 74 6f 20 74 68 65 20 45 6c 65 63 74 72 6f 6e 20 |to the Electron | 00000b40 61 6e 64 20 74 68 65 20 65 78 70 61 6e 73 69 6f |and the expansio| 00000b50 6e 20 75 6e 69 74 20 6d 75 73 74 20 62 65 0d 74 |n unit must be.t| 00000b60 75 72 6e 65 64 20 6f 66 66 20 62 65 66 6f 72 65 |urned off before| 00000b70 20 74 68 65 20 65 78 70 61 6e 73 69 6f 6e 20 6d | the expansion m| 00000b80 6f 64 75 6c 65 20 69 73 20 63 6f 6e 6e 65 63 74 |odule is connect| 00000b90 65 64 20 74 6f 20 6f 72 20 64 69 73 63 6f 6e 6e |ed to or disconn| 00000ba0 65 63 74 65 64 0d 66 72 6f 6d 20 74 68 65 20 45 |ected.from the E| 00000bb0 6c 65 63 74 72 6f 6e 2e 0d 0d 54 68 65 20 45 6c |lectron...The El| 00000bc0 65 63 74 72 6f 6e 20 70 6f 77 65 72 20 73 75 70 |ectron power sup| 00000bd0 70 6c 79 20 6d 61 79 20 62 65 20 75 73 65 64 20 |ply may be used | 00000be0 74 6f 20 70 6f 77 65 72 20 65 78 70 61 6e 73 69 |to power expansi| 00000bf0 6f 6e 20 6d 6f 64 75 6c 65 73 20 74 6f 20 61 0d |on modules to a.| 00000c00 74 6f 74 61 6c 20 6f 66 20 35 30 30 6d 41 20 64 |total of 500mA d| 00000c10 72 61 77 6e 20 66 72 6f 6d 20 74 68 65 20 2b 35 |rawn from the +5| 00000c20 56 20 74 65 72 6d 69 6e 61 6c 20 6f 6e 20 74 68 |V terminal on th| 00000c30 65 20 65 78 70 61 6e 73 69 6f 6e 20 63 6f 6e 6e |e expansion conn| 00000c40 65 63 74 6f 72 2c 20 61 6e 64 0d 32 30 6d 41 20 |ector, and.20mA | 00000c50 66 72 6f 6d 20 74 68 65 20 2d 35 56 20 74 65 72 |from the -5V ter| 00000c60 6d 69 6e 61 6c 2e 20 20 54 48 45 53 45 20 41 52 |minal. THESE AR| 00000c70 45 20 54 4f 54 41 4c 20 46 49 47 55 52 45 53 20 |E TOTAL FIGURES | 00000c80 46 4f 52 20 41 4c 4c 20 45 58 50 41 4e 53 49 4f |FOR ALL EXPANSIO| 00000c90 4e 0d 55 4e 49 54 53 20 43 4f 4d 42 49 4e 45 44 |N.UNITS COMBINED| 00000ca0 2e 0d 0d 54 68 65 20 31 38 56 20 41 43 20 74 65 |...The 18V AC te| 00000cb0 72 6d 69 6e 61 6c 73 20 6f 6e 20 74 68 65 20 65 |rminals on the e| 00000cc0 78 70 61 6e 73 69 6f 6e 20 63 6f 6e 6e 65 63 74 |xpansion connect| 00000cd0 6f 72 20 6d 61 79 20 62 65 20 75 73 65 64 20 74 |or may be used t| 00000ce0 6f 20 64 72 69 76 65 20 61 20 6c 6f 77 0d 76 6f |o drive a low.vo| 00000cf0 6c 74 61 67 65 20 70 6f 77 65 72 20 73 75 70 70 |ltage power supp| 00000d00 6c 79 20 69 6e 20 74 68 65 20 65 78 70 61 6e 73 |ly in the expans| 00000d10 69 6f 6e 20 6d 6f 64 75 6c 65 2c 20 62 75 74 20 |ion module, but | 00000d20 74 68 65 20 74 6f 74 61 6c 20 70 6f 77 65 72 20 |the total power | 00000d30 64 72 61 77 6e 0d 66 72 6f 6d 20 74 68 65 20 45 |drawn.from the E| 00000d40 6c 65 63 74 72 6f 6e 20 6d 61 69 6e 73 20 70 6f |lectron mains po| 00000d50 77 65 72 20 61 64 61 70 74 6f 72 20 6d 75 73 74 |wer adaptor must| 00000d60 20 6e 65 76 65 72 20 65 78 63 65 65 64 20 31 34 | never exceed 14| 00000d70 20 77 61 74 74 73 20 28 77 6f 72 73 74 0d 63 61 | watts (worst.ca| 00000d80 73 65 29 2e 20 20 49 66 20 6e 6f 20 70 6f 77 65 |se). If no powe| 00000d90 72 20 69 73 20 62 65 69 6e 67 20 64 72 61 77 6e |r is being drawn| 00000da0 20 62 79 20 74 68 65 20 65 78 70 61 6e 73 69 6f | by the expansio| 00000db0 6e 20 75 6e 69 74 20 66 72 6f 6d 20 74 68 65 0d |n unit from the.| 00000dc0 45 6c 65 63 74 72 6f 6e 27 73 20 2b 35 56 20 73 |Electron's +5V s| 00000dd0 75 70 70 6c 79 20 74 68 65 6e 20 36 57 20 6d 61 |upply then 6W ma| 00000de0 79 20 73 61 66 65 6c 79 20 62 65 20 64 72 61 77 |y safely be draw| 00000df0 6e 20 66 72 6f 6d 20 74 68 65 20 31 38 56 20 41 |n from the 18V A| 00000e00 43 20 6c 69 6e 65 73 20 6f 6e 0d 74 68 65 20 65 |C lines on.the e| 00000e10 78 70 61 6e 73 69 6f 6e 20 63 6f 6e 6e 65 63 74 |xpansion connect| 00000e20 6f 72 2e 20 20 54 68 65 20 74 68 65 72 6d 61 6c |or. The thermal| 00000e30 20 66 75 73 65 20 69 6e 20 74 68 65 20 6d 61 69 | fuse in the mai| 00000e40 6e 73 20 70 6f 77 65 72 20 61 64 61 70 74 6f 72 |ns power adaptor| 00000e50 20 69 73 0d 62 6c 6f 77 6e 20 69 72 72 65 74 72 | is.blown irretr| 00000e60 69 65 76 61 62 6c 79 20 69 66 20 74 68 65 73 65 |ievably if these| 00000e70 20 76 61 6c 75 65 73 20 61 72 65 20 65 78 63 65 | values are exce| 00000e80 65 64 65 64 2e 0d 0d 45 78 70 61 6e 73 69 6f 6e |eded...Expansion| 00000e90 20 70 6f 77 65 72 20 73 75 70 70 6c 79 3a 0d 0d | power supply:..| 00000ea0 54 6f 20 61 63 63 6f 6d 6d 6f 64 61 74 65 20 65 |To accommodate e| 00000eb0 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 6c 65 73 |xpansion modules| 00000ec0 20 61 6e 64 20 63 6f 6d 62 69 6e 61 74 69 6f 6e | and combination| 00000ed0 73 20 6f 66 20 6d 6f 64 75 6c 65 73 20 77 68 69 |s of modules whi| 00000ee0 63 68 20 72 65 71 75 69 72 65 0d 6d 6f 72 65 20 |ch require.more | 00000ef0 63 75 72 72 65 6e 74 2c 20 61 20 73 65 70 61 72 |current, a separ| 00000f00 61 74 65 20 70 6f 77 65 72 20 73 75 70 70 6c 79 |ate power supply| 00000f10 20 6d 75 73 74 20 62 65 20 75 73 65 64 2e 20 20 | must be used. | 00000f20 57 68 65 6e 20 74 68 69 73 20 69 73 20 64 6f 6e |When this is don| 00000f30 65 2c 0d 74 68 65 20 30 56 20 72 61 69 6c 20 6f |e,.the 0V rail o| 00000f40 66 20 74 68 65 20 65 78 70 61 6e 73 69 6f 6e 20 |f the expansion | 00000f50 6d 6f 64 75 6c 65 20 6d 75 73 74 20 62 65 20 63 |module must be c| 00000f60 6f 6e 6e 65 63 74 65 64 20 74 6f 20 74 68 65 20 |onnected to the | 00000f70 30 56 20 74 65 72 6d 69 6e 61 6c 0d 6f 66 20 74 |0V terminal.of t| 00000f80 68 65 20 45 6c 65 63 74 72 6f 6e 20 65 78 70 61 |he Electron expa| 00000f90 6e 73 69 6f 6e 20 63 6f 6e 6e 65 63 74 6f 72 2e |nsion connector.| 00000fa0 20 20 54 68 65 20 2b 35 56 20 72 61 69 6c 20 61 | The +5V rail a| 00000fb0 6e 64 20 74 68 65 20 2d 35 56 20 72 61 69 6c 20 |nd the -5V rail | 00000fc0 28 69 66 0d 69 6d 70 6c 65 6d 65 6e 74 65 64 29 |(if.implemented)| 00000fd0 20 6d 75 73 74 20 72 65 6d 61 69 6e 20 69 73 6f | must remain iso| 00000fe0 6c 61 74 65 64 20 66 72 6f 6d 20 74 68 65 20 45 |lated from the E| 00000ff0 6c 65 63 74 72 6f 6e 2e 0d 0d 4f 6e 20 6e 6f 20 |lectron...On no | 00001000 61 63 63 6f 75 6e 74 20 73 68 6f 75 6c 64 20 61 |account should a| 00001010 6e 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 |n expansion modu| 00001020 6c 65 20 70 6f 77 65 72 20 73 75 70 70 6c 79 20 |le power supply | 00001030 62 65 20 64 65 73 69 67 6e 61 74 65 64 20 74 6f |be designated to| 00001040 0d 64 72 69 76 65 20 74 68 65 20 45 6c 65 63 74 |.drive the Elect| 00001050 72 6f 6e 27 73 20 31 38 56 20 41 43 20 6c 69 6e |ron's 18V AC lin| 00001060 65 73 2e 20 20 54 68 69 73 20 63 6f 75 6c 64 20 |es. This could | 00001070 63 72 65 61 74 65 20 61 20 63 6f 6e 66 6c 69 63 |create a conflic| 00001080 74 20 77 69 74 68 20 74 68 65 0d 45 6c 65 63 74 |t with the.Elect| 00001090 72 6f 6e 27 73 20 6f 77 6e 20 41 43 20 73 75 70 |ron's own AC sup| 000010a0 70 6c 79 2c 20 61 6e 64 20 77 6f 75 6c 64 20 62 |ply, and would b| 000010b0 65 20 65 78 74 72 65 6d 65 6c 79 20 64 61 6e 67 |e extremely dang| 000010c0 65 72 6f 75 73 20 69 66 20 74 68 65 0d 45 6c 65 |erous if the.Ele| 000010d0 63 74 72 6f 6e 27 73 20 6d 61 69 6e 73 20 70 6f |ctron's mains po| 000010e0 77 65 72 20 74 72 61 6e 73 66 6f 72 6d 65 72 20 |wer transformer | 000010f0 77 65 72 65 20 70 6c 75 67 67 65 64 20 69 6e 74 |were plugged int| 00001100 6f 20 74 68 65 20 45 6c 65 63 74 72 6f 6e 20 77 |o the Electron w| 00001110 68 65 6e 0d 64 69 73 63 6f 6e 6e 65 63 74 65 64 |hen.disconnected| 00001120 20 66 72 6f 6d 20 74 68 65 20 6d 61 69 6e 73 2e | from the mains.| 00001130 0d 0d 0d |...| 00001133
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