Re: [ql-users] Help on RGB Monitor
Engstler Karsten wrote: Hello, can please someone give me a hint on this: I have an 1084s RGB Monitor with: Pin-Outs (1084S DB9) Pin 1: Ground Pin 2: Ground Pin 3: Red Pin 4: Green Pin 5: Blue Pin 6: Unused Pin 7: Composite Sync Pin 8: Horizontal Sync Pin 9: Vertical Sync How do I connect the QL ? it looks like HSYNC is missing on the QL site. When I've connected RGB monitors to my QL, I used RGB, GND Comp Sync and they seemed to work fine. So try: NameQL Monitor GND 2 1 or 2 (or possibly both - try to see which works!?) SYNC4 7 GREEN 6 4 RED 7 3 BLUE8 5 Anyone want to offer any warning, or do you think it's ok to give this a go? Robert ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
[ql-users] Test
Please ignorejust changing my email address - checking done it right. ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [ql-users] Help on RGB Monitor
On Tue, 30 Aug 2005 22:17:16 +0100 Robert Newson [EMAIL PROTECTED] writes: Engstler Karsten wrote: Hello, can please someone give me a hint on this: I have an 1084s RGB Monitor with: Pin-Outs (1084S DB9) Pin 1: Ground Pin 2: Ground Pin 3: Red Pin 4: Green Pin 5: Blue Pin 6: Unused Pin 7: Composite Sync Pin 8: Horizontal Sync Pin 9: Vertical Sync How do I connect the QL ? it looks like HSYNC is missing on the QL site. When I've connected RGB monitors to my QL, I used RGB, GND Comp Sync and they seemed to work fine. So try: NameQL Monitor GND 2 1 or 2 (or possibly both - try to see which works!?) SYNC4 7 GREEN 6 4 RED 7 3 BLUE8 5 Anyone want to offer any warning, or do you think it's ok to give this a go? Robert I'm not sure about the specific monitor you are referring to, but to use a standard RGB Monitor with the QL, one of the signals has to be inverted. Someone else can/will tell you how to do this -- I can tell you that it involves a single chip + some rudimentary wiring/soldering -- the schematic was floating around North America about 10+ years ago. Sorry to be so non-specific. ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
RE: [ql-users] Help on RGB Monitor
The monitor probably the old pre digital video output with 9pin Dtype plug. There is the lm1881 sync separator, cheap and easy, need an inverter IC when it is known which, equipment signals, are pos or neg going. http://www.maplin.co.uk/module.aspx?ModuleNo=2565doy=31m8QV=Y Alternately it should be poss' to subtract the H from the comp with a CMOS 4011, and use the other NANDs as inverters as needed. http://www.ece.cmu.edu/~ee100/docs/Chapter10.pdf Both options need power picked up from one end or other. You cant do much harm juggling the inversion after the QLis protected by the first Nanding. Have fun, did it myself too many years ago for a quirky monitor. Message Received: Aug 28 2005, 11:15 PM From: Engstler Karsten To: [EMAIL PROTECTED] Cc: Subject: [ql-users] Help on RGB Monitor Hello, can please someone give me a hint on this: I have an 1084s RGB Monitor with: Pin-Outs (1084S DB9) Pin 1: Ground Pin 2: Ground Pin 3: Red Pin 4: Green Pin 5: Blue Pin 6: Unused Pin 7: Composite Sync Pin 8: Horizontal Sync Pin 9: Vertical Sync How do I connect the QL ? it looks like HSYNC is missing on the QL site. ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [ql-users] Help on RGB Monitor
Al Feng wrote: I'm not sure about the specific monitor you are referring to, but to use a standard RGB Monitor with the QL, one of the signals has to be inverted. No, I'm pretty sure that was a hack to get CGA monitors working. I think I had the monitor Karsten was referring to (it was definitely some Commodore), but I'm not sure I have the cable anymore. But I just took apart an RGB cable of another monitor, and there the only connected pins are actually R, G, B, H-Sync and ground. H-Sync is connected to the QL's Video-Sync (Pin 4). V-Sync is not connected, even though both the QL and the monitor feature that pin. Probably because those monitors were fixed frequency anyway (just a guess, while I can usually vouch for everything I say about software, the same is not necessarily true for hardware ;-) Marcel ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
