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- Hello fellow Falconites! Here is a plan for making your very own
- Multi-sync adapter/switcher for the Falcon030. I've been using my
- original prototype for months now, and I wanted to share it with
- everyone.
-
- Be Warned! This adapter has one purpose only, and that is to adapt an
- ST compatible Multi-sync to the Falcon. It will not enhance the use
- of a VGA monitor, and may damage it with sync-rates it cannot use.
- However, if you have a Multi-sync, it will allow you to use all the
- 1224/TV modes on it as well as VGA modes.
-
- ******* READ THIS! *******
- I take NO responsibility for damage to anyone's Falcon, Monitor, or
- Sanity as a result of this information. I encourage you to verify my
- data and DO NOT attempt this unless you are familiar with soldering
- (especially cable-making). TURN OFF your monitor and Falcon prior to
- connecting this device, and TURN OFF your Falcon IMMEDIATELY if it
- does not work as expected, and recheck your work.
-
- Okay, with that out of the way, let me describe what this thing does.
- The Falcon's new enhanced video port has 2 pins that inform the
- machine of the monitor connected. These are Monitor Select 1 and 0.
- These are the possibilities:
-
- M1 M0 Monitor type
- ----------------------
- 0 0 ST Monochrome
- 0 1 ST Color
- 1 0 VGA
- 1 1 TV
-
- Now, the Atari adapter that you connect to the Falcon pulls down
- these pins. If there is no adapter, the pins remain high signaling TV
- mode. The 2 modes we want to emulate on the Multi-sync are ST color
- and VGA (We can select ST Monochrome from the Set Video menu already).
-
- First we need to construct a simple VGA adapter as follows:
-
- Falcon 030 pin (DB19)|VGA pin (HD15)
- ------------------------------------
- Red 1 | 1
- Green 2 | 2
- Blue 3 | 3
- Ground 5 | 5 *
- Red Ground 6 | 6
- Green Ground 7 | 7
- Blue Ground 8 | 8
- Ground 10 |10
- Ground 11 | 5 *
- Hsync 13 |13
- Vsync 14 |14
-
- Note that I used all the ground pins in the video port and I tied 2
- of them (*) to the same VGA pin. All this grounding may not be
- necessary, but I wanted the cleanest signal possible.
-
- Now, we need to make use of the monitor select lines to choose our
- mode. I used a SPDT switch and wired it this way:
- __
- __|__|_____
- |_______| Bry's amazing rendition of a toggle slide switch.
- | | |
- 1 2 3
-
- Falcon Pin|Switch Pin
- ---------------------
- M1 18| 1 (throw)
- M0 19| 3 (throw)
- GND 11| 2 (pole)
-
- This will alternately pull M0 and M1 low, resulting in a selection of
- ST Color and VGA mode.
-
- I constructed my adapter using a 12 conductor wire with shield, but
- you may use as few as 9 if you tie the grounds together. I do not
- reccomend tying R,G and B grounds into the same wire. You may not
- need shielded wire if you use a short length (my adapter is about 6
- inches long). I got a mini slide switch from Radio Shack and mounted
- it in the DB 19 hood. If you do this, you must be careful to route
- wires around the switch when assembling the hood, and the switch must
- be placed away from the DB19 connector, so it does not get in the way
- of the solder cups. Basically, plan out your construction, because
- those DB19 hoods are hard to come by (order 2 to allow for mistakes!).
-
- ** Using the Adapter **
-
- The Falcon TOS looks to M0 and M1 upon boot-up and everytime a
- program does a Setscreen (a change of video mode), so this switch
- can be flipped on the fly for programs that only run on a certain
- monitor. One example is the PLASMA30.PRG demo. If you are in VGA
- mode, it will not set the correct screen, and will look distorted,
- however, if you flip the switch before running it, the next Setscreen
- call made by the demo will choose a 1224 mode correctly. This gives
- you the most from your Multi-sync monitor: The ability to select any
- mode the Falcon can do.
-
- Feel free to send comments, questions, and ESPECIALLY errors to:
-
- Bryan Edewaard
- Delphi: BRYEDEWAARD
- Email: bryedewaard@delphi.com
-
- Parts:
-
- DB9/HD15 hood, Toggle switch - Radio Shack
-
- DB19 female solder connector, HD15 female solder connector,
- DB19 Hood - Best Electronics
-
- Misc... 9+ conductor wire.
-
- See included picture for more detail.
-
-
-