From: Baltissen, GJPAA (Ruud) (ruud.baltissen_at_abp.nl)
Date: 2003-09-10 07:21:44
Hallo allemaal, > > published in a 64'er so I could scan it. But I couldn't find it :( About two years ago I went through all 64'ers and made a note of all interesting looking articles. I either missed this article, forgot to note it, didn't think it was interesting at all at that time or it isn't published in the 64'er because I couldn't find it. And going through a 1 meter high pile of magazines is asked a bit to much. Anyway, I looked at the print itself and the first thing I must say is that I was completely wrong about the 6522. The print taps the line of RAM. One address of the RAM is reserved to note the address the head is going to move to. And data written to this address is copied to the print. That simple (I think). How is that done? Two 74LS688's take care of the address, chipselect and R/W-line. An EPROM is used to convert the Hexadecimal number into decimal. Two 4511 7-segments display drivers latch the result and do the rest. That's all IMHO. PS.: C64.org is down, so note my original URL. -- ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://home.hccnet.nl/G.Baltissen/ =====DISCLAIMER================================================================= De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen. The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose its contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission. Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.