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- Hawkeye/Kefrens
- ³¼INDICATORS¼³
- ¹
-
- This article will contain some information about how to make indicators for
- nearly everything on the Amiga. In most case only a lightdiode, a resister and
- a soldering iron is required. You can make hundreds of different indicators.
- Ex. if you would like to know if the disk is writeprotected or not without
- taking it out of the diskdrive. Or if you wanna know if the diskdrive is
- saving.
-
- First, buy some LEDs and some resitors. The size of the resister can be
- calculated like this: We know that the LED use 1,5 V - 0,020 A and the supply-
- voltage is 5 VDC. Then the "formula" will be: (5V-1,5)/0,020=175 Ohm. The
- closest standard-resister we can find is 180 Ohm. So buy those. Now the 'hard'
- thing will come !!! (The connection). First find the 5 V. You can find it
- nearly everywhere, but it is best to take it from the 86-pin-connector. It is
- the one, used for Action Replay, harddisk etc. If you have placed the Amiga so
- the 86-pin-connector points at you, the pin which gives 5 volt is no. 3 from
- left. Solder a little wire on this pin, (use as little space as possible, or
- your harddisk or AR can not fit in. Take the other end of the wire and solder
- a resister to it. Now solder the LONG leg of the lightdiode on the resister
- and a wire on the short end. This wire which now is "free" is to be used as
- the indicatorwire. The following list, shows which IC/Leg you should solder
- on, to get which thing you wants to indicate !?!?!
-
-
-
- Effect IC No. Leg
-
- Buserror Processor 68000 22
- Interrupt 1 Processor 68000 25
- Interrupt 2 Processor 68000 24
- Interrupt 3 Processor 68000 23
- Pause Processor 68000 17
- Reset Processor 68000 18
- Bus Grant Processor 68000 11
- Bus Request Processor 68000 13
- Bus Grant Ackn. Processor 68000 12
- Valid Mem. Addr Processor 68000 19
-
- Extra Mem. On Gary 5719 32
- Rom Enable Gary 5719 21
- Clock Read Gary 5719 22
- Clock Write Gary 5719 23
- Keyboard Reset Gary 5719 5
- Motor on Drive Gary 5719 7
-
- Dram Writeenab. Fat Agnus 8371-72 21
- Joystick Fires Fat Agnus 8371-72 78
-
- Seriel Recieve Paula 8364 41
- Seriel Sends Paula 8364 40
- Disk Saves Paula 8364 38
- Disk Loads Paula 8364 37
-
- Composite Sync Denise 8362 32
- (Blanking Sig.)
-
- Filter On U7 8520 3
- Diskchange U7 8520 4
- Disk WProtect U7 8520 5
- Head Track00 U7 8520 6
- Drive Ready U7 8520 7
-
- Drive Steps U8 8520 10
- Side A/B U8 8520 11
- Diskindex U8 8520 24
- 68000 Read/WriteU8 8520 22
-
- This is perhaps half of the list, but some are rather useless !!! If you by
- some strange reason want the complete list, just write me !!!
-
- This project is dangerous for the health of your computer. Not if you make it
- as written BUT if you have NO electronic experience, ask one of your friends
- to do it. Also remember to count right on the IC's (Remember the little
- 'notch' were you start counting):
-
- _____________
- 1| |_| |64
- 2| |63
- 3| |62
- 4| |61
- 5| |60
- 6| |59
- 7| |58
- Etc Etc.
-
- It's ofcourse not like this on the Fat Agnus, but ask at your local computer-
- shop for a diagram over the 8372...
- It's also important NOT to make to many indicators because the powersupply
- cannot handle to much amps. But this should be no problem either, simply use
- 2 milliamp. LEDS !!! The very techminded would ofcourse make this with buffers.
- I can recommend 4010 or 74367 to be used.
-