ROSCO M68K Smoke Test

[@stevenspmd]

Best of luck. In terms of subscribers, its a very under rated channel.

[@alisondenu5317]

Was watching your TRS-80 Coco repair series from a couple of years ago, and the model number caught my eye. You have a rarity there, it's one of the ones with an enhanced VDG that has native lowercase characters available. I believe there is a pair of pokes that enables the feature, but I do not know what they are because I have never had one of the 3127B model units.

[@MartianTech]

They can't be that rare because I've got two of them...

[@alisondenu5317]

@@MartianTech Well snap! That sounds like trade goods. Yeah, those 6847T1's are pretty much Unobtainium.

[@AmauryJacquot]

circles on the active low pins are US style symbols. the triangles are the DIN norm that is in use in europe.

[@MartianTech]

I don't know about US vs European style, but the circles predate the triangles. The 1981 Supplement to the TTL Data Book from Texas Instruments has an entire chapter on "Explanation of New Logic Symbols" and displays new style logic symbols for the new ICs that are presented elsewhere in the book.

[@lohikarhu734]

I just happen to have a m68k EVM, 1979 vintage, the very first one in Western Canada...

[@vanhetgoor]

Once in history the 68k was advanced, I am getting old.