thanks for the feedback John. I feel a bit like an idiot ... 1) I did not jump K2 1-2 on the Prop board 2) the Propeller code I modified to display colors poorly is the issue as it does not trigger P12 properly... Need to rework this quite a bit.... I will post here the corrected code (and some description text as you requested John, been qute busy over the past weeks) ASAP
cheers Philippe Le samedi 6 juin 2015 10:57:57 UTC+2, monahanz a écrit : > > > Philippe, it's not clear to me what exactly the problem is. > "VI1 does arrive at IR1 on the 8259 but INT is not asserted" > then:- > "the 8259 seems to work fine as INT is generated and INTA" > > The INTA will only be generated by the 8259A if it gets and accepts an INT. > > Have you tried another INT vector. > > John > > > > On Friday, June 5, 2015 at 10:37:01 AM UTC-7, Philippe Elie wrote: > >> Hi folks, >> >> I finished the PC-AT V2 board and started testing it with the 8086 V1 >> board (running monitor 10.33). All fine, RTC and timer look OK but I have >> trouble when testing the BIOS keyboard functions. >> >> I use the Propeller board so jumpered VI1 and I do see the appropriate >> LED on the LED bar of the PC-AT blink when I hit a key. VI1 does arrive at >> IR1 on the 8259 but INT is not asserted. the 8259 seems to work fine as INT >> is generated and INTA as well as displayed by D2 and D1 when jumping VI0 to >> the system tick on P54. >> >> I checked the way the 8259 is initialized : when entering the 8086 >> monitor, I clear the interrupt mask with "QO21 00" and I see D2 (INT) blink >> to reflect VI0. then I mask VI0 (QO21 01) but still get no INT when hitting >> the keyboard. >> >> the 8259 seems properly accessed as all bit patterns written to 021H are >> read back correctly. I have the Z80 V2 board so VI0-7 are pulled up by the >> board (I did not install RR9 on the PC-AT board). >> >> I'm a bit puzzled to be honest... If you guys could provide some >> guidance, I would be grateful >> >> thanks >> Philippe >> >> >> >> -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
