Hi There is already uPD7220 demonstration for the ECB uPD7220 GDC board. It uses an almost identical design except for ECB instead of S-100. It includes the BT478, uPD7220, etc. The software is on the wiki in the ECB uPD7220 folder. Thanks and have a nice day!
Andrew Lynch From: David Fry <[email protected]> To: [email protected] Cc: [email protected] Sent: Monday, April 28, 2014 7:22 AM Subject: Re: [N8VEM-S100:3344] S-100 boards in work - uPD7220 Hi Andrew, Thanks for looking at the schematic changes,just wanted to make sure I hadn't introduced any errors. The design rule checker doesnt report any errors so should be ok to go to prototype. (Changed 15pin Dsub connector for 2 x 8 IDC as per Console I/O + Lava10 boards) So, is anyone else out there interested in being involved in a prototype run of the S100 uPD7220 GDC board ? As John has already pointed out this will involve many hours of coding to make the board functional, so this may be one for those who like a challenge :-) If no none steps forward in the Z80 camp then I will happily take on the Z80 coding but results will be slow as I am relearning my Z80 asm after 30 years away, but maybe others out there might be interested in writing code for other processors ??? Just trying to guage the level of interest at the moment and work out a way forward. I have attached a zip of the KiCad files (modified for 2 x 8 IDC monitor connector) I'm using KiCad build (2013-07-07 BZR 4022)-stable your comments and feedback please Regards David Fry On Saturday, April 26, 2014 5:56:07 PM UTC+1, monahanz wrote: I think we need to do a prototype run on that board first. While it contains elements of 3 previous boards we did, it is the first time they are all put together in one place. Also as a few of us know, we had real problems with that BT478 chip on the VDP board (which itself BTW needs to have another prototype run). > >On the 7220 I will help out with the hardware, the thing to remember about the >7220 is you have to do quite a bit of software writing to get it to be of any >use. Is somebody prepared to do that. Because without software that >chip/board is useless. > >John > > >From:[email protected] [mailto:n8vem...@ googlegroups.com] On Behalf >Of David Fry >Sent: Saturday, April 26, 2014 7:40 AM >To: [email protected] >Subject: Re: [N8VEM-S100:3295] S-100 boards in work > >Hi Ed, > >Andrew has uploaded the EDA files for the uPD7220 GDC this afternoon, if you >feel inclined to do a production run then put me down for 1 board >just for curiosity value. It might be worth considering a smaller run of 5 to >10 boards as this board has failed to spark sufficient interest for a >production run >before. looking a previous forum posts for the uPD7220 GDC it would appear to >be a descendant of the ECB uPD7220 graphics board interfaced to the S100 bus >and is ripe for testing. > >https://groups.google.com/forum/#!searchin/n8vem-s100/upd7220/n8vem-s100/KNTuzzAdKbU/XIY-yZTK4dUJ > >Regards > >David Fry > >On Friday, April 25, 2014 11:19:04 PM UTC+1, Edward Snider wrote: >It does seem like it would be an interesting board for an S100 system. >>With almost all of the work done it would be a shame not to go through to >>completion. >> >>Unfortunately I don't have enough of a system together to help in testing, >>but I can chip in a bit >>for prototypes. I'd also be willing to handle the production run if we can >>get takers for at least >>20 boards, if that would be helpful. >> >>Ed >> >> >>On Tuesday, September 24, 2013 1:45:38 AM UTC-5, nekonoko wrote: >>Hi Andrew, >> >>I can definitely see chipping in at least some of the cost. I find the >>uPD7220 GDC interesting as several business class CP/M systems used it for >>graphics (DEC Rainbow, QX-10 etc.). >> >>Thanks much, >> >>Pete >> >> >-- >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 n8vem-s100+...@ googlegroups.com. >For more options, visit https://groups.google.com/d/optout.-- 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. -- 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.
