On 7/6/2018 12:10 PM, smf wrote: > On 05/07/2018 11:34, Michał Pleban wrote: >> You have a valid point, but considering how unlikely is it >> that someone would write another IPC protocol for the board, we decided >> that using another chip had less downsides. > > You gave up the fun of creating a 6523, made it harder to write new > software, it's an extra intel chip in a commodore machine and you've > set a precedent: > > "Can you not replace these with the D8255 chip like was done on the > 8088 card?" > > What were the downsides to recreating a 6523? > > I protest the direction you're taking the discussion. This seems less like a valid debate and more like a troll attempt. * No one was doing anything in this space before Michal did some work * While a dual 6522 approach would no doubt work, layout was eased by using the 8255. Since it was already an Intel card, an 8255 is at home on the board. * He reworked the card to use a 8255, and modified the ROM to use the new IC I believe he also put up the original schematics and PCB files, for the version that uses a 6523. So, if another person wants to build the unit with a 6523, they can. Arguing with the person who did all the work and trying to convince him that his goals were less admirable than yours will not have a successful outcome. We should congratulate Michal for taking the time to update the design for a 30+ year old machine to use an OS that is equally old and no longer current. Arguing over the choice of I/O IC seems overly petty in context. Jim -- Jim Brain brain@jbrain.com www.jbrain.comReceived on 2018-07-06 20:02:08
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