100 REM  "CALIBRATE"  FOR 64 OR 128.
110 REM  CONNECT USER PORT PINS 4, B & C.
120 REM  LOAD "NEWMODEM" OBJECT CODE AT P1.
130 REM  FOR 128 MODE, UN-REM 230-250.
140 REM  ADJUST VALUES IN 210. RUN. * = ERROR.
150 REM  RUN/STOP RESTORE TO END TRIAL.
160 REM  S = (1,2) MHZ; DM = DMA OFF(0), ON(1).
170 REM
180 CLOSE2:OPEN2,2,0,CHR$(6)+CHR$(0):ML=12288
190 FORI=MLTOML+116:READA:POKEI,A:Z=Z+A:NEXT
200 IFZ<>15157THENPRINT"DATA ERROR":CLOSE2:END
210 SB=459:FB=421:CN=418:TX=425:S=1:DM=1
220 RI=65212:BF=PEEK(250)*256:BO=665:P1=52736
230 REM RI=65331:BF=3328:BO=2582:P1=6656
240 REM SLOW:IFS=2THENFAST:GOTO260
250 REM IFDM=0ANDPEEK(215)THENPOKEML+107,234
260 FORI=BFTOBF+255:POKEI,85:NEXT:SYSP1
270 A=P1+16+(TX/256AND6):B=SB:GOSUB310
280 A=A+6:B=FB:GOSUB310:A=BO:B=TX:GOSUB310
290 A=251:B=CN:GOSUB310:A=598:B=RI:GOSUB310
300 POKEP1+241,0:PRINT#2,"U";:SYSML
310 Q=INT(B/256):POKEA+1,Q:POKEA,B-Q*256:RETURN
320 DATA 162,   2,  32, 198, 255,  32,  39,  48
330 DATA  32, 228, 255, 201,  85, 240, 249,  32
340 DATA 183, 255, 208, 244, 169,  42,  32, 210
350 DATA 255,  76,   8,  48, 169, 255, 141,  12
360 DATA 220, 173,  13, 220, 108,  86,   2, 120
370 DATA 166, 251, 164, 252, 169,   0, 141,  26
380 DATA 208, 141,  15, 220, 169, 127, 141,  13
390 DATA 220, 141,  25, 208, 142,   4, 220, 140
400 DATA   5, 220, 169,  81, 141,  14, 220, 160
410 DATA 255, 140,  12, 220, 162,   5, 173,  13
420 DATA 220,  41,   1, 240, 249, 202, 208, 246
430 DATA 140,  12, 220, 169,  28, 141,  20,   3
440 DATA 169,  48, 141,  21,   3, 169, 136, 141
450 DATA  13, 220,  88,  96, 173,  17, 208,  41
460 DATA 239, 141,  17, 208,  96