Ukusebenza namakhompyutha amadala kuvame ukuba nzima ngoba awahambisani nehardware yesimanje.Uma uqaphele ukuthi amanani ama-TV amadala we-CRT (i-cathode ray tube) nama-monitor anyuke kakhulu muva nje, ungawubonga umdlalo we-retro nomphakathi wamakhompyutha we-retro.Akukhona nje kuphela ukuthi izithombe ezinokulungiswa okuphansi zibukeka kangcono kuma-CRT, kodwa amasistimu amaningi amadala awakwazi nje ukukhiqiza ividiyo eyamukelekayo kumamonitha esimanje.Isixazululo esisodwa siwukusebenzisa i-adaptha ukuguqula i-RF endala noma isignali yevidiyo eyinhlanganisela ibe isignali yesimanjemanje.Ukusiza ekuthuthukiseni ama-adaptha anjalo, i-dmcintyre idale lesi siqalisi sevidiyo sama-oscilloscopes.
Ngenkathi iguqula ividiyo, i-dmcintyre ihlangabezane nenkinga lapho i-chip yevidiyo ye-TMS9918 ingazange icuphe ububanzi ngendlela enokwethenjelwa.Lokhu kwenza kucishe kungenzeki ukuhlaziya amasiginali wevidiyo, okungadingeka kulabo abazama ukuwaguqula.Ama-chips ochungechunge lwe-Texas Instruments TMS9918 VDC (Video Display Controller) athandwa kakhulu futhi asetshenziswa kumasistimu amadala afana ne-ColecoVision, amakhompyutha we-MSX, i-Texas Instruments TI-99/4, njll. .Uxhumano lwe-USB lukuvumela ukuthi uthwebule ngokushesha ama-waveform kuma-oscilloscopes amaningi, okuhlanganisa ne-dmcintyre's Hantek oscilloscopes.
Isekhethi ye-trigger yevidiyo ihluke kakhulu futhi idinga amasekhethi ambalwa ahlanganisiwe: i-Microchip ATmega328P microcontroller, i-74HC109 flip-flop, kanye nesihlukanisi sokuvumelanisa ividiyo se-LM1881.Zonke izingxenye zidayiswa ebhodini lokudla elijwayelekile.Uma ikhodi ye-dmcintyre isifakwe ku-ATmega328P, kulula kakhulu ukuyisebenzisa.Xhuma ikhebula ohlelweni uye kokokufaka kwe-Video Trigger kanye nekhebula eliphuma kokuphumayo kwe-Video Trigger liye kusiqapha esihambisanayo.Bese uxhuma ikhebula le-USB kokokufaka kwe-oscilloscope.Setha isikophu ukuthi sicuphe onqenqemeni olulandelanayo olunomkhawulo ongaba ngu-0.5V.
Ngalokhu kusetha, manje usungakwazi ukubona isignali yevidiyo ku-oscilloscope.Ukucindezela isishumeki esijikelezayo kudivayisi ye-trigger yevidiyo kushintsha phakathi konqenqema olukhuphukayo noluwayo lwesignali yesiqalisi.Vula isifaki khodi ukuze uhambise ulayini wokucupha, cindezela bese ubamba isifaki khodi ukuze usethe kabusha umugqa wokucupha ube uziro.
Ayenzi noma yikuphi ukuguqulwa kwevidiyo, ivumela umsebenzisi ukuthi ahlaziye isignali yevidiyo evela ku-TMS9918 chip.Kodwa ukuhlaziya kufanele kusize abantu bathuthukise iziguquli zevidiyo ezihambisanayo ukuze baxhume amakhompyutha amadala kumamonitha esimanje.
Isikhathi sokuthumela: Nov-17-2022