On Tue, Nov 16, 2021 at 9:23 AM Douglas Taylor via cctalk <cctalk at classiccmp.org> wrote: I have an original DEC RX01 floppy labeled: AS-H300E-BC INSTMT BUS SUB V2.1 BIN RX1 (c) 1983 Digital Equipment Corporation I have an image I created from that floppy which I can mount using PUTR, and then access the files on the floppy image: C:\PUTR>PUTR PUTR V2.01 Copyright (C) 1995-2001 by John Wilson <wilson at dbit.com>. All rights reserved. See www.dbit.com for other DEC-related software. COPY mode is ASCII, SET COPY BINARY to change (C:\PUTR)>MOUNT RX0: AS-H300E.IMG /RONLY /RX01 (C:\PUTR)>DIR RX0: Volume in drive RX0 is RT11A Directory of RX0:\*.* 16-Nov-2021 IB .MAC 76 27-Mar-1982 IBBASE.MAC 8 27-Mar-1982 IBCBLK.MAC 3 27-Mar-1982 IBCMD .MAC 2 27-Mar-1982 IBDCL .MAC 1 27-Mar-1982 IBDEV .MAC 2 27-Mar-1982 IBERMF.MAC 5 27-Mar-1982 IBERR .MAC 4 27-Mar-1982 IBERRF.MAC 2 27-Mar-1982 IBERSH.MAC 3 27-Mar-1982 IBGET .MAC 1 27-Mar-1982 IBGTL .MAC 1 27-Mar-1982 IBIFC .MAC 1 27-Mar-1982 IBINIT.MAC 6 27-Mar-1982 IBLEGL.MAC 2 27-Mar-1982 IBLLO .MAC 1 27-Mar-1982 IBLNR .MAC 2 27-Mar-1982 IBLSN .MAC 5 27-Mar-1982 IBPPD .MAC 2 27-Mar-1982 IBPPE .MAC 2 27-Mar-1982 IBPPL .MAC 2 27-Mar-1982 IBPPU .MAC 1 27-Mar-1982 IBRCVS.MAC 1 27-Mar-1982 IBRDA .MAC 1 27-Mar-1982 IBRECV.MAC 3 27-Mar-1982 IBREMO.MAC 2 27-Mar-1982 IBREN .MAC 1 27-Mar-1982 IBSDC .MAC 1 27-Mar-1982 IBSEND.MAC 3 27-Mar-1982 IBSPL .MAC 3 27-Mar-1982 IBSRQ .MAC 5 27-Mar-1982 IBSRQF.MAC 1 27-Mar-1982 IBSTER.MAC 2 27-Mar-1982 IBSTS .MAC 2 27-Mar-1982 IBTERM.MAC 2 27-Mar-1982 IBTIMO.MAC 2 27-Mar-1982 IBTLK .MAC 4 27-Mar-1982 IBUNIT.MAC 2 27-Mar-1982 IBUNL .MAC 2 27-Mar-1982 IBUNT .MAC 2 27-Mar-1982 IBWAIT.MAC 1 27-Mar-1982 IBXFER.MAC 3 27-Mar-1982 IB .ASM 9 27-Mar-1982 IBLOC .ASM 1 27-Mar-1982 IBMNC .SYS 10 27-Mar-1982 IBXMNC.SYS 11 27-Mar-1982 IBNMNC.SYS 10 27-Mar-1982 IBXNMC.SYS 11 27-Mar-1982 IBDBLD.COM 1 27-Mar-1982 IBLIB .OBJ 45 27-May-1982 IBSVER.FOR 7 27-Mar-1982 IBXBLD.COM 1 08-Mar-1983 IBSBLD.COM 2 08-Mar-1983 IBLBLD.COM 10 27-Mar-1982 < UNUSED > 193 54 Files, 293 Blocks 193 Free blocks (C:\PUTR)>COPY RX0:IBSVER.FOR C: IBSVER.FOR C**************************************************************************** C C THIS PROGRAM IS THE INSTALLATION/VERIFICATION PROGRAM FOR THE IBS IEEE BUS C INTERFACE ROUTINES. C C***************************************************************************** C EXTERNAL SERVE !ADDRESS OF USER'S SRQ HANDLING ROUTINE. BYTE ASCII(26) !ASCII ARRAY CONTAINING THE ALPHABET. INTEGER TALK,STAT IBZERO=' ' !ASCII CODE FOR ZERO INSTRUMENT ADDRESS LISTEN=5 !OUR LISTENER'S PRIMARY IEEE BUS ADDRESS. TALK=6 !OUR TALKER'S PRIMARY IEEE BUS ADDRESS. MAXL=15 !OUR MAXIMUM TRANSMIT/RECEIVE LENGTH. LINE=6 C TYPE 1000 1000 FORMAT('1 IBS-11 V2.1 Verification Program'/// 1' This procedure assumes that IB.SYS (or IBX.SYS) has been INSTALLED 2 and LOADED'/' in this system. Also, this procedure assumes 3 that no devices'/' are connected to your IBV11-A/IB11 4 instrument bus.') TYPE 1001 1001 FORMAT(//' The first part of this test calls routines that do 1 not depend'/' on any device and thus should produce no 2 error messages.'//) C CALL IBSTER(16,20) !ALLOW ERROR NUMBER 16 (TIME-OUT) TO OCCUR 20 X CALL IBSTER(5,5) !ALLOW THE NO DEFAULT LISTENER ERROR 5 TIMES CALL IBSTER(7,2) !ALLOW THE BAD UNIT ERROR TO OCCUR TWICE CALL IBSTER(15,25) !ALLOW THE NO VALID LISTENER ERROR TO OCCUR 25 X CALL IBSRQ(SERVE,,,STAT) !SET-UP TO HANDLE SRQ'S CALL IBSRQF(IFLG) !GET STATUS OF SRQ IEEE INTERFACE CONTROL LINE CALL IBTERM() !CLEARS INTERNAL TERMINATOR'S LIST CALL IBPPL !CONDUCT A PARALLEL POLL CALL IBIFC !ISSUE THE IEEE INTERFACE-CLEAR STAT=IBERRF() !GET ERROR INFORMATION CALL IBRDA !DISABLE (TURN-OFF) THE IEEE REMOTE LINE CALL IBREN !ENABLE (TURN-ON) THE IEEE REMOTE LINE TYPE 1002,IBREMO() !READ AND TYPE THE REMOTE LINE STATUS 1002 FORMAT(' IBREMO should return minus one at this point. IBREMO =' 1I6) C TYPE 1003 1003 FORMAT(//' At this point non-fatal error messages should begin to 1 appear.'//' ****EXPECTED ERROR MESSAGES****' 2/' -------------------------------') CALL IBTIMO(120) !SET TIME-OUT VALUE TO 2 SECONDS CALL IBDEV(TALK,IBZERO) !SET-UP SRQ-CAPABLE DEVICE ADDRESS LIST CALL IBLNR() !CHECK FOR VALID LISTENERS CALL IBSEND(ASCII,MAXL,LISTEN) CALL IBSEOI(ASCII,MAXL,LISTEN) CALL IBRECV(ASCII,MAXL,TALK) CALL IBRCVS(STAT) !GET OUR RECEIVE STATUS BACK LENGTH=IBXFER(MAXL,TALK,LISTEN) CALL IBASND(ASCII,MAXL,LISTEN) CALL IBARCV(ASCII,MAXL,TALK) CALL IBAXFR(MAXL,TALK,LISTEN) CALL IBWAIT !WAIT FOR PRECEDING ASYNCHRONOUS I/O TO COMPLETE CALL IBFREE(LISTEN,TALK) CALL IBGTL(LISTEN) CALL IBSDC(LISTEN) CALL IBGET(LISTEN) CALL IBCMD(7) STAT=IBSTS(TALK) IFUN=IBSPL(STAT,TALK) CALL IBPPE(ISENSE,LINE) CALL IBPPD() CALL IBPPU CALL IBUNL CALL IBUNT CALL IBLLO CALL IBDCL CALL IBUNIT(2) TYPE 1004 1004 FORMAT(//' IBS-11 VERIFICATION PROCEDURE SUCCESSFUL!'//) STOP 'END IBS VERIFY' END C C***************************************************************************** C C THE USER'S SRQ HANDLING ROUTINE: C C***************************************************************************** SUBROUTINE SERVE RETURN END

On 2021-11-16 1:25 p.m., Glen Slick via cctalk wrote: Hi Glen, Can you make the image available? Thanks --Toby

On 11/17/21 3:10 PM, Glen Slick via cctalk wrote: uploaded to http://bitsavers.org/bits/DEC/pdp11/floppyimages/RT11-V05.01.ZIP

On Tue, 16 Nov 2021 at 16:27, Ethan Dicks via cctalk <cctalk at classiccmp.org> wrote: Hmm now that I'm reminded that a large proportion of Commodore's "stuff" was IEEE 488 or a serialized version thereof. I kind of want to see now if an IBV11 and Commodore 1541 can be abused into cooperating. (There'd need to be a small "box of stuff" to turn the real 488 bus to CBM's serial thing.) I'll second this; many thanks for sharing the official DEC RT-11 drivers and code. Best regards, Christian -- Christian M. Gauger-Cosgrove STCKON08DS0 Contact information available upon request.

On Tue, Nov 16, 2021 at 6:09 PM Christian Gauger-Cosgrove <captainkirk359 at gmail.com> wrote: Yep. All PETs have true IEEE-488, albeit a software-driven implementation so it's not high-speed (few kb/sec). Starting with the VIC-20, they used that serialized version, because Jack Tramiel was tired of the cost of cables and connectors. I think it could be done. The IBV11 can certainly keep up with the 6502 in the drive that's banging out the IEEE-488 protocol. You would need a box like that (they do exist) for talking to a later device like the abundant 1541 floppy drive, but you could just plug the cable right into an older drive for the PET, a 4040 dual-double-density 5.25 drive, or an 8050/8250 drive (higher density, more tracks), or even a D9060/D9090 hard drive (5MB or 7.5MB, internally has an MFM drive and a SASI-ST506 bridge). The "DOS" is in ROM in the disk drives, including everything about files and filesystem layout. You wouldn't have to port that to the PDP-11. You talk to all the drives with the usual IEEE protocol of secondary addresses and command strings. On the PET side, it's LOAD/SAVE, OPEN/CLOSE, and PRINT#/INPUT# (later ROMs added a command layer for "disk commands" but they are just wrappers around the primitive calls). The directory is a special file named "$"; to get a directory, you open that file and read the contents. The drive sends the directory not as plain text, but as a loadable BASIC program so you do have to convert "line numbers" (file block sizes) to ASCII, and you have to convert all the text contents from PETSCII to ASCII. All doable in a couple of pages of code. There are a number of books for how the Commodore side works. You can even use the later serialized drive books to understand the higher protocol. At a character level, it's identical. In terms of using it as a more generic device, there are block-level primitive commands (U1 and U2 for read and write-block) but the physical block size is 256 bytes, even on the D9060/D9090 hard drives. I'm sure it's possible to write a native driver for RT-11, bypassing the Commodore filesystem, but it sure would be slow. -ethan

On Thu, Nov 18, 2021 at 3:15 AM Christian Corti via cctalk <cctalk at classiccmp.org> wrote: That's really cool. There are a few non-Commodore systems that were able to talk to Commodore floppy drives. I didn't know the Tektronix 4051 was one of them. Do you know if it works at the flie level or the block level? -ethan