On 07/24/2016 11:41 AM, Segher Boessenkool wrote: > On Sun, Jul 24, 2016 at 06:43:15AM +0200, Gerrit Heitsch wrote: >> On 07/23/2016 11:56 PM, Segher Boessenkool wrote: >>> On Sat, Jul 23, 2016 at 09:21:26PM +0200, Gerrit Heitsch wrote: >>>> Forgot that in the last post... There is also the 6510T as used in the >>>> 1551 floppy drive. It has the full 8 Bit port. To me the pinout suggests >>>> that it's just a different bond out of the 6510: >>> >>> Or (more likely imnsho) 8500. >> >> Depends... On the later Chips, MOS included a number to the right of the >> datecode. From what we've been able to determine, if it starts with a >> '1', the Chip is NMOS and if it starts with a '2', the chip is HMOS-II. >> The other numbers are the revision and match the R-number if it's >> present on the chip. I have a few 6510 from after 1986 that have a '16' >> printed there, so they would be NMOS which would suggest the 6510T also >> to be NMOS since it's from 1984. > > Great info, thanks! > > I was thinking 1581 actually... *facepalm* > > 1551 is from 1985, 1581 is from 1987. Or so the net wants us to believe. But that one uses a 6502... :) > >>>> _______ _______ >>>> _RES [1 V ] Phi2 Phi0 [1 V ] _RES >>>> Phi0 [ ] R/_W _HALT [ ] Phi2 >>> >>> This is wrong btw, that #HALT pin is RDY. Where does that #HALT name >>> come from? >> >> Good question, it's been a long time since I wrote that. I'll change it. >> Still means the same though. RDY = HIGH => CPU is running. #HALT = LOW >> => CPU is stopped. > > Except during writes, etc. But where did you get the name? I've never > seen it before. Don't ask me, I wrote that little text file years ago when I wanted to see the difference between 6510 and 6510T side by side. It's been fixed. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2016-07-24 11:00:02
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