RSP.TXT ******* ----------------------------------------------------------------------- Transmission rate measurements without RSP protocol(27-oct-81): DL-11 serial interface, 9600 Baud is used, ca. 0.5 Kw/s.(DLTEST,DLECHO) ----- DR-11 (C, DRV-11 00) parallel interfaces(on PDP 11/34 + LSI 11/23): ----- interrupt: 2*64 Kwords in 19. sec. =ca. 7. Kw/s.(DRTEST,DRECHO) (.INTEN) interrupt: 2*64 Kwords in 7.5 sec. =ca. 17. Kw/s.(DRTST1,DRECH1) loop : 2*64 Kw. in 3.7 sec. =ca. 34. Kw/s.(DRTST0,DRECH0) ----------------------------------------------------------------------- DIAGNOSTICS: DRT00 : Transmits a testword and waits for receive, compares DRE00 : Echo's a word received. Conditionals: LIGHT to select testword on display FAST to omitted .INTEN in interr. service DRTB00 : Transmits a whole buffer, then waits for receive, comp. buff. DREB00 : Echo's a buffer received. ------------------------------------------------------------------------------ PERFORMANCE: 10 times READ and WRITE 1024 words(=4 blocks) gives: PDP-11/34 PDP-11/03 LSI-11/23 ----------------------------- using FORTRAN low-mem array: 37. clock ticks.(Threaded) " " " " : 14. 29. 17. " " (In-line) " " VIRTUAL " : 103. " " (Threaded) " " VIRTUAL " : 89. " " (In-line) " MACRO low-mem array: 3.01 6.66 3.86 " " " MACRO low-mem array: 2.50 5.26 3.19 " " (Optimiz.) on VM: .READW/.WRITW : 7. " " on RK05 " : 81. " " on RX01 " : 420. DATA-COMMUNICATION: PDP-11/34 <--> LSI-11/23 --------------------------------------------- VM: RK05 (Removable drive) ----------------------------------------------------------------------------- PDL <--> DR -F 1B : 140. 230. (Looping HD)DR +F 1B : 74. 199. DR -F 4B : 135. 199. DR +F 4B : 70. 141. PDI-F <--> DR -F 1B : 164. 299. (Interrupt) DR +F 1B : 143. 240. DR -F 4B : 155. 220. DR +F 4B : 138. 199. PDI+F <--> DR -F 1B : 147. 240. (Interrupt) DR +F 1B : 91. 199. (no .INTEN) DR -F 4B : 143. 221. DR +F 4B : 87. 160. Note: all values are clockticks( 1=20. ms.) ----------------------------------------------------------------------------- RSP(Radial Serial Protocol): Note: when 2 values are given the 1st. is for the DL-11 serial coupling and the 2nd. for the DR-11 parallel coupling. Level 1 codes(flagbyte/word): ----------------------------- XOFF=23 ;19. RSP R$INIT = INIT = 4 ;4. protocol R$CONT = CONTIN= 20 ;16. chars R$CDAT = CNDATA= 40 ;32. Continue with DATA (not for DD) BOOT= 10 ;8. R$MSG = COMMND= 2 ;2. R$DATA = 1 ;DATA-packet headerflag R$MSIZ = 10. ;Message packet contents size R$DSIZ = PKDSIZ 64.bytes/256.words ;Data packet max. contents size R$ASIZ = PKASIZ R$DSIZ/2*R$DSIZ ;Adres offset Command packet: +-----------------------------------------------+ ************** 1 ! pkt. cnt 10 b./5 w. ! packet flag = 2 ! 0 ! PK$MBC / PKTBYT ! PK$FLG/CMDPKT/ENDPKT ! ------------------------------------------------- 3 ! modifier ! opcode ! 2 ! PK$MOD/I$MSUC/MODIF ! PK$OPC/I$MOPC/OPCODE ! ------------------------------------------------- 5 ! special function cod.! unitnr. 0-7 ! 4 ! PK$SPF ! PK$UNT / UNIT ! ------------------------------------------------- 7 ! additional spec. func. dataword, SPDATA ! 6 ! PK$SSQ ! ------------------------------------------------- 9 ! bytecount/wordcount ! 8 ! PK$BCT / BYTCNT / WRDCNT ! ------------------------------------------------- 11 ! blocknr. !10 ! PK$RCD / BLCKNR ! ------------------------------------------------- 13 ! checksum !12 ! PK$CKS / CMDCHK ! ------------------------------------------------- Level 2 codes(opcode byte): --------------------------- R$$NOP = 0 ;No operation, not used in datacomm. version. R$$INT = 1 ;Initialize , " " " " " R$$RED = 2 ;Read R$$WRT = 3 ;Write R$$POS = 5 ;Position R$$END = 100 ;Endpacket code, see below. End packet: ------------------------------------------------- ********** 1 ! packet count (10/5) ! packet flag = 2 ! 0 ------------------------------------------------- 3 ! I$MSUC succescode ! I$MOPC= 64.=100 ! 2 ------------------------------------------------- 5 ! PK$SPFE SPFUN/SPDIR error return block word 1! 4 ------------------------------------------------- 7 ! " " " " word 2! 6 ------------------------------------------------- 9 ! " " " " word 3! 8 ------------------------------------------------- 11 ! " " " " word 4!10 ------------------------------------------------- 13 ! checksum !12 ------------------------------------------------- Succescodes, TU58 version: -------------------------- O.k. = 0 = 0 O.k. with retries = 1 = 1 Failed self test = -1 = 377 Partial op.(Medium End) = -2 = 376 Hard error = -6 = 372 Bad unit nr. = -8. = 370 No cardridge = -9. = 367 Write protect = -11. = 365 Data checksum error = -17. = 357 Seek error, blk.not fnd.= -32. = 340 Motor stopped = -33. = 337 Bad opcode = -48. = 320 Bad blocknr.(>DEVSIZ) = -55. = 311 Succescodes, Datacomm. version: ------------------------------- O.k. = 0 = 0 Hard error = -1 = 377 End of File = -2 = 376 Max. X= 128. bytes/ 256. words(X=0 !) Data packet: ------------------------------------------------- *********** 1 ! packet count X (b/w)! packet flag = 1 ! 0 ------------------------------------------------- 3 ! 2 nd data byte ! 1 st data byte ! 2 ------------------------------------------------- 5 ! 4 th data byte ! 3 th data byte ! 4 ------------------------------------------------- / / ------------------------------------------------- XX+1 ! last 2 data bytes/ last data word !XX ------------------------------------------------- XX+3 ! checksum !XX+2 ------------------------------------------------- DD/PD.SYS ! DDJOB/DRJOB ------------------------------------------------------------------ READ: **** Command packet --------------> <------------------- Data packet 128. byt./256. word <------------------- " " " " " " // <------------------- Data packet XX bytes/words <------------------- End packet WRITE: ***** Command packet --------------> <------------------- Continue/Continue with DATA Full data packet ------------> <------------------- C/CDATA (DD:1 byte/DR:1 word) Full data packet ------------> // Data XX byt./wrds. ------------> <------------------- Endpacket -------------------------------------------------------------------