Because the display RAM is multiplexed between the video generation circuitry and the need for CPU accesses, something have to be carried out when each need to access video memory at the identical time. The 8b parallel port was multiplexed with a bit of exterior logic to be able to scan the keyboard and to access the internal floppy disk drive. Rather than having a self adequate keyboard which used an considerably expensive LSI chip to map key presses to ASCII codes, the Compucolor as an alternative would scan the keyboard itself. The keyboard used by the Compucolor II was related via a ribbon cable via the 5501 parallel port. The shift, caps lock, control, and repeat keys on the keyboard might be independently sensed. Most keys might produce four values, depending which combination of of the shift and management keys were pressed at the same time an everyday key was struck. With 100- through 300-sequence cameras, you may have the ability to get away with utilizing a manual flash at nearer distances than the computed distance, however you shouldn't rely on the camera's metering system to supply the correct publicity mechanically. While I have never examined this-- with 400-sequence cameras, you may be capable to 'manually' adjust the flash exposure yourself at the digital camera by altering the position of the Scene Selector and/or ASA dial to choose the lens aperture.
In this case, I merely connected a regular Pc cable to the Pc outlet on the digicam. The second check, once more, used the Rollei flash and a typical Pc flash cable. The resulting picture was slightly underexposed (barely more so by comparability with the Kako flash on the 450), but nonetheless is perhaps thought-about an appropriate photograph. The resulting photo turned out to be just about correctly uncovered, nevertheless. Since there are literally 1000's of various models of flashes on the market made by dozens (if not hundreds) of various manufacturers, there isn't any approach for me to know whether or not or not your particular flash/digicam combination will work to your satisfaction. This flash has a information variety of fifty six (ASA 100, ft), and is fairly typical of widespread cheap flashes (truly, I bought this one for a dollar from a supplier's 'bargain bin' at a digicam show). Second, there is evident evidence that digital flashes can be utilized successfully with folding automatic Polaroid pack cameras without any modification made to the camera itself.
Two very different digital flashes have been chosen for this experiment. As a result of encouraging results in the 2nd and 3rd tests, I made two additional check images to find out if the metering system was truly ready to respond during the temporary flash duration of those electronic flashes. This is actually the identical way the camera handles unusual daylight images-- the metering system operates dynamically through the exposure. Since it is a handbook flash and so was already operating at full power, I moved the digital camera to 3.5 toes from the take a look at goal (the digicam's minimal focus). When searching for a bracket, however, ensure and measure the bottom of the bracket-- or, higher but, convey your digicam alongside-- many flash brackets aren't lengthy sufficient to accomodate the width of a Polaroid pack camera (especially since the tripod socket of these cameras is manner over on the suitable-hand facet of the camera's base). 490 Focused Flash, Facebook simply as meant for this digicam. 490 flash has) with the intention to 'fool' the autoexposure system to thinking I had connected the correct Polaroid flash.
The fourth test was with the Rollei flash and my 'particular' cable as described earlier. I used the Kako Mite electronic flash for the third test. The opposite flash is a fairly typical low-finish manual shoe-mount flash, a Kako Mite. One is a excessive-energy (but not significantly fashionable) thyristor computerized shoe-mount flash, a Rollei 134 REB. Ideally, A flash should be chosen that has an computerized mode geared for about f/8.Eight exposures at about ASA 80. If a guide flash is used (or an computerized flash is utilized in manual mode), then you must keep to across the calcualted 'ideally suited' distance for exposures at f/8.8 with ASA 80 movie. Test pictures have been taken at a distance of 5 ft, which was chosen because of it being a typical distance for indoor portraits, and also in an effort to accomodate the Kako Mite's fixed flash output (with ASA 80 film and the cameras' f/8.8 lenses, optimum exposure ought to be at something around 5 toes).
Compucolor.org - Home
by Silvia Rome (2025-01-24)
Because the display RAM is multiplexed between the video generation circuitry and the need for CPU accesses, something have to be carried out when each need to access video memory at the identical time. The 8b parallel port was multiplexed with a bit of exterior logic to be able to scan the keyboard and to access the internal floppy disk drive. Rather than having a self adequate keyboard which used an considerably expensive LSI chip to map key presses to ASCII codes, the Compucolor as an alternative would scan the keyboard itself. The keyboard used by the Compucolor II was related via a ribbon cable via the 5501 parallel port. The shift, caps lock, control, and repeat keys on the keyboard might be independently sensed. Most keys might produce four values, depending which combination of of the shift and management keys were pressed at the same time an everyday key was struck. With 100- through 300-sequence cameras, you may have the ability to get away with utilizing a manual flash at nearer distances than the computed distance, however you shouldn't rely on the camera's metering system to supply the correct publicity mechanically. While I have never examined this-- with 400-sequence cameras, you may be capable to 'manually' adjust the flash exposure yourself at the digital camera by altering the position of the Scene Selector and/or ASA dial to choose the lens aperture.
Two very different digital flashes have been chosen for this experiment. As a result of encouraging results in the 2nd and 3rd tests, I made two additional check images to find out if the metering system was truly ready to respond during the temporary flash duration of those electronic flashes. This is actually the identical way the camera handles unusual daylight images-- the metering system operates dynamically through the exposure. Since it is a handbook flash and so was already operating at full power, I moved the digital camera to 3.5 toes from the take a look at goal (the digicam's minimal focus). When searching for a bracket, however, ensure and measure the bottom of the bracket-- or, higher but, convey your digicam alongside-- many flash brackets aren't lengthy sufficient to accomodate the width of a Polaroid pack camera (especially since the tripod socket of these cameras is manner over on the suitable-hand facet of the camera's base). 490 Focused Flash, Facebook simply as meant for this digicam. 490 flash has) with the intention to 'fool' the autoexposure system to thinking I had connected the correct Polaroid flash.
The fourth test was with the Rollei flash and my 'particular' cable as described earlier. I used the Kako Mite electronic flash for the third test. The opposite flash is a fairly typical low-finish manual shoe-mount flash, a Kako Mite. One is a excessive-energy (but not significantly fashionable) thyristor computerized shoe-mount flash, a Rollei 134 REB. Ideally, A flash should be chosen that has an computerized mode geared for about f/8.Eight exposures at about ASA 80. If a guide flash is used (or an computerized flash is utilized in manual mode), then you must keep to across the calcualted 'ideally suited' distance for exposures at f/8.8 with ASA 80 movie. Test pictures have been taken at a distance of 5 ft, which was chosen because of it being a typical distance for indoor portraits, and also in an effort to accomodate the Kako Mite's fixed flash output (with ASA 80 film and the cameras' f/8.8 lenses, optimum exposure ought to be at something around 5 toes).