Call 61167,2 ;)
On Friday, July 27, 2018, Andy Lawrence <[email protected]> wrote: > After the fun with my T102 I decided to continue the fun with a busted > T200 off eBay. After a complete re-cap, fixing lots of keyboard traces, > huge mounts of cleaning I now have a nice functional T200! This unit came > with the RAM fully populated and an EME ROM, which doesn't seem to do > anything, calling 63012 locks is up, and 63013 returns OK with nothing else > obvious. No NiCad or Y2K mods yet cause I ran out of parts, waiting on > Digikey. > > Well I got bored waiting on Digikey and thought, how fast can this thing > go, so I swapped the 4.9151 crystal with a 10Mhz (all I had in-stock), and > it boots and runs! So I quickly threw this program together, prime number > example I found online modded to time the loop: > > 1 POWER CONT > 10 CLS > 20 PRINT "LIMIT"; > 30 INPUT L > 31 HH$ = LEFT$(TIME$,2) > 32 MM$ = MID$(TIME$,4,2) > 33 SS$ = RIGHT$(TIME$,2) > 37 SEC = VAL(SS$) + (VAL(MM$) * 60) + (VAL(HH$) * 3600) > 40 FOR N = 3 TO L > 50 FOR D = 2 TO (N-1) > 60 IF N/D=INT(N/D) THEN GOTO 100 > 70 NEXT D > 80 PRINT N; > 90 GOTO 110 > 100 PRINT "."; > 110 NEXT N > 111 HH$ = LEFT$(TIME$,2) > 112 MM$ = MID$(TIME$,4,2) > 113 SS$ = RIGHT$(TIME$,2) > 114 SECE = (VAL(SS$) + (VAL(MM$) * 60) + (VAL(HH$) * 3600) - SEC) > 117 PRINT "Duration = "; SECE ; " Seconds" > 120 END > > Duration factory = 43sec, duration overclocked = 21sec! (with an input of > 100) > > It isn't completely stable, sometimes I have to power it on 2-3 times, but > once on it doesn't seem to have any trouble, aside from the clock resetting > on occasion. I've not yet studied the schematic to determine if it's > because 10Mhz isn't a multiple of the factory 4.9152, or because it's > simply too fast to read properly, but I'll figure it out. I ran the > above to 1000 a few times without issue or any lock ups. File transfer > even works if I set my PC to 2400bps and the T200 to 1200. > > Overclocked comes at a 20mA over stock hit. > > Fun fun, happy Friday. > BR, > Andy > > > > > >
