I thought about building an analog to digital converter for a classic mac (Plus to SE/30). I did this with some serial converters (TLD548 or Max187) for a serial RS-232 for PCs. For the programming of these chips you need three lines of the rs232 that you can set to high and low. Then you can...
Perhaps someone is interested in two programs for ROMs that I developed. SplitRom can be used to split a ROM into high and low ROM. CompareROM compares two ROM-Files. When they are identical then there will be shown zero differences.
I use the programs in Windows 7. They were programmed in...
I have two classic analog boards that show 0 volt at the floppy port. I measured the volts at cp22 and one had 45 Volts, the other had 0 volt. At a functioning board I measured 90 volts, but I read in another thread that there should be 300 volts. Anay ideas, where I can find the defect part?
I have an analog board of a Classic II that shows a single horizontal line on the screen. I replaced the TEA2037A but that did not change anything. With another analog board, the Mac works. What else can influence the vertical deflection?
Hi!
I do not know, if it is interesting for someone, but I try to build an external floppy cable. I want to use it for testing floppydrives. I collected some informations, that are listed in the enclosed pdf-file. Next I will build one cable and try if it works.
Martin
Floppy Cable Macintosh.pdf
I have two parallel printing interfaces of Jonathan Freeman Technologies. Does anybody have the driver software? And there is a connector for the power supply. I so not know the pin assignment (Center pin plus Ort minus, Vortage?).
Thanks for any help.
Martin
Hello!
I bought a Mac 512 that has a problem with the mainboard. When I got the Mac, the ROM chips (low, high) were interchanged and the MAC did not start. I changed the ROM chips and the the MAC started somtimes. Sometimes I got a sad MAC with the error 05FFFF. Sometimes I got no Image and...