Re: DEC PDP-8/E wanted - still looking
On 11/27/2020 3:07 AM, Tom Hunter via cctalk wrote: I don't really want to have to learn how to play Adventure to reproduce this. Games are not my thing except maybe chess. Best regards Tom Hunter Adventure immediately types out a 4 or 5 line "room" description, which is in the initial case a step away from the building outside the cave. any input should hang if this bug occurs from the descriptions of it. You won't have to do any inputs related to the game as it takes in and analyzes all inputs. I think you get back another description and "nothing happens" if you type something that is rejected. BTW "Build" "enter building" and "plugh" or "xyzzy" should get a response from the game if you want more bits of the game executed. thanks Jim
Re: DEC PDP-8/E wanted - still looking
On 11/27/2020 6:07 AM, Tom Hunter via cctalk wrote: Hi Dave, Thanks for Bob Armstrong's old email. I have not seen Jim's VHDL code, but I am quite confident I can fix this. Tom Urban wrote that the IOB6120 is misbehaving, so I will have to do some fault finding or debugging anyway. I would appreciate a short Fortran code snippet which reproduces the problem. I don't really want to have to learn how to play Adventure to reproduce this. Games are not my thing except maybe chess. That's pretty simple. A "Hello world" program will probably show it. INTEGER INPUT(20) WRITE(4,1) 1 FORMAT(1X,'ENTER A STRING') READ(4,2)INPUT 2 FORMAT(20A1) WRITE(4,3)INPUT 3 FORMAT(1X, 'YOU SAID ', 20A1) STOP END Create "TEST.FT" with that content, then "EXEC TEST.FT" at the OS/8 dot prompt. If you can successfully enter a string and get a result, then you're probably not having interrupt issues. -Rick
Re: DEC PDP-8/E wanted - still looking
Hi Dave, Thanks for Bob Armstrong's old email. I have not seen Jim's VHDL code, but I am quite confident I can fix this. Tom Urban wrote that the IOB6120 is misbehaving, so I will have to do some fault finding or debugging anyway. I would appreciate a short Fortran code snippet which reproduces the problem. I don't really want to have to learn how to play Adventure to reproduce this. Games are not my thing except maybe chess. Best regards Tom Hunter On Fri, Nov 27, 2020 at 6:29 PM wrote: > Tom, > > This is the e-mail I got from Bob Armstrong.. > > Dave > > > > = > > > > *From:* sparetimegiz...@yahoogroups.com [ > mailto:sparetimegiz...@yahoogroups.com ] > *Sent:* 15 July 2015 15:53 > *To:* sparetimegiz...@yahoogroups.com > *Subject:* RE: [sparetimegizmos] Any builders of the SBC6120 in the UK > > > > The FORTRAN RTS uses interrupts, whereas most OS/8 software does not, > and so it reveals bugs that are not otherwise apparent. > > > > As I recall the problem was with the VGA/PS2 console implementation in > the FPGA. Jim didn’t handle clearing the flags and the interrupt request > quite correctly, and it made FORTRAN hang up in an interrupt loop. It > should be easy enough to fix by revising the VHDL, but I’m not sure Jim > ever did. Make sure you have the latest IOB6120 firmware. > > > > FWIW, FORTRAN does work with the SBC6120 onboard serial console enabled > so you can use the IOB so long as you’re not using the VGA console. > > > > This was an issue for many people because it broke the ADVENTure game, > which is also written in FORTRAN :-) > > > > Bob > > > > > > *From:* Tom Hunter > *Sent:* 27 November 2020 01:08 > *To:* Dave Wade > *Cc:* General Discussion: On-Topic and Off-Topic Posts < > cctalk@classiccmp.org> > *Subject:* Re: DEC PDP-8/E wanted - still looking > > > > Hi Dave, > > Could you please explain how exactly the VT emulation "kills" the Fortran > run time system in OS/8? > > What is the fault? How do you trigger it? Have you got a Fortran code > snippet which reproduces the problem? > > Was there some previous discussion about it answering my questions above? > > I have a reasonable level of experience with VHDL and Xilinx ISE so maybe > I can fix it if I can reproduce it. > > Thanks and best regards > > Tom Hunter > > > > On Thu, Nov 26, 2020 at 6:28 PM wrote: > > Tom, > > If it has an IOB6120 then it the VT emulation kills the Fortran run time > system in OS8. > > Dave > G4UGM > > > -Original Message- > > From: cctalk On Behalf Of Tom Hunter via > > cctalk > > Sent: 26 November 2020 06:02 > > To: General Discussion: On-Topic and Off-Topic Posts > > > > Subject: DEC PDP-8/E wanted - still looking > > > > Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer > > complete > > with front-panel and IO board is on its way to me. :-) > > > > I am still looking to buy one of the following PDP-8 models: > > > > PDP-8/F > > PDP-8/E > > PDP-8/L > > PDP-8/I > > PDP-8/M > > > > Dave, Chris, Paul and Robert I am looking forward to getting more details > > from you. > > > > I am happy to pay a reasonable price for the right PDP-8, so a seller > won't be > > disappointed. > > > > Thanks and best regards > > Tom Hunter > >
RE: DEC PDP-8/E wanted - still looking
Tom, This is the e-mail I got from Bob Armstrong.. Dave = From: sparetimegiz...@yahoogroups.com <mailto:sparetimegiz...@yahoogroups.com> [mailto:sparetimegiz...@yahoogroups.com] Sent: 15 July 2015 15:53 To: sparetimegiz...@yahoogroups.com <mailto:sparetimegiz...@yahoogroups.com> Subject: RE: [sparetimegizmos] Any builders of the SBC6120 in the UK The FORTRAN RTS uses interrupts, whereas most OS/8 software does not, and so it reveals bugs that are not otherwise apparent. As I recall the problem was with the VGA/PS2 console implementation in the FPGA. Jim didn’t handle clearing the flags and the interrupt request quite correctly, and it made FORTRAN hang up in an interrupt loop. It should be easy enough to fix by revising the VHDL, but I’m not sure Jim ever did. Make sure you have the latest IOB6120 firmware. FWIW, FORTRAN does work with the SBC6120 onboard serial console enabled so you can use the IOB so long as you’re not using the VGA console. This was an issue for many people because it broke the ADVENTure game, which is also written in FORTRAN :-) Bob From: Tom Hunter Sent: 27 November 2020 01:08 To: Dave Wade Cc: General Discussion: On-Topic and Off-Topic Posts Subject: Re: DEC PDP-8/E wanted - still looking Hi Dave, Could you please explain how exactly the VT emulation "kills" the Fortran run time system in OS/8? What is the fault? How do you trigger it? Have you got a Fortran code snippet which reproduces the problem? Was there some previous discussion about it answering my questions above? I have a reasonable level of experience with VHDL and Xilinx ISE so maybe I can fix it if I can reproduce it. Thanks and best regards Tom Hunter On Thu, Nov 26, 2020 at 6:28 PM mailto:dave.g4...@gmail.com> > wrote: Tom, If it has an IOB6120 then it the VT emulation kills the Fortran run time system in OS8. Dave G4UGM > -Original Message- > From: cctalk <mailto:cctalk-boun...@classiccmp.org> > On Behalf Of Tom Hunter via > cctalk > Sent: 26 November 2020 06:02 > To: General Discussion: On-Topic and Off-Topic Posts > mailto:cctalk@classiccmp.org> > > Subject: DEC PDP-8/E wanted - still looking > > Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer > complete > with front-panel and IO board is on its way to me. :-) > > I am still looking to buy one of the following PDP-8 models: > > PDP-8/F > PDP-8/E > PDP-8/L > PDP-8/I > PDP-8/M > > Dave, Chris, Paul and Robert I am looking forward to getting more details > from you. > > I am happy to pay a reasonable price for the right PDP-8, so a seller won't be > disappointed. > > Thanks and best regards > Tom Hunter
Re: DEC PDP-8/E wanted - still looking
at smecc we have an extra first model classic-8 in a rack the blue one that a white desk section can mount to not the Plexiglas surrounds do not know what it would take to plexi one but this is in a rack. downside? it is at the back of a warehouse so it would not be fast unless enough extra money was there for a work crew to unload... extract and reload. cost?? to be determined but a full hp series III 3000 could be part of the fee!ed sharpe smeccIn a message dated 11/25/2020 11:02:16 PM US Mountain Standard Time, cctalk@classiccmp.org writes: Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer completewith front-panel and IO board is on its way to me. :-) I am still looking to buy one of the following PDP-8 models: PDP-8/FPDP-8/EPDP-8/LPDP-8/IPDP-8/M Dave, Chris, Paul and Robert I am looking forward to getting more detailsfrom you. I am happy to pay a reasonable price for the right PDP-8, so a seller won'tbe disappointed. Thanks and best regardsTom Hunter
Re: DEC PDP-8/E wanted - still looking
Hi Dave, Could you please explain how exactly the VT emulation "kills" the Fortran run time system in OS/8? What is the fault? How do you trigger it? Have you got a Fortran code snippet which reproduces the problem? Was there some previous discussion about it answering my questions above? I have a reasonable level of experience with VHDL and Xilinx ISE so maybe I can fix it if I can reproduce it. Thanks and best regards Tom Hunter On Thu, Nov 26, 2020 at 6:28 PM wrote: > Tom, > > If it has an IOB6120 then it the VT emulation kills the Fortran run time > system in OS8. > > Dave > G4UGM > > > -Original Message- > > From: cctalk On Behalf Of Tom Hunter via > > cctalk > > Sent: 26 November 2020 06:02 > > To: General Discussion: On-Topic and Off-Topic Posts > > > > Subject: DEC PDP-8/E wanted - still looking > > > > Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer > > complete > > with front-panel and IO board is on its way to me. :-) > > > > I am still looking to buy one of the following PDP-8 models: > > > > PDP-8/F > > PDP-8/E > > PDP-8/L > > PDP-8/I > > PDP-8/M > > > > Dave, Chris, Paul and Robert I am looking forward to getting more details > > from you. > > > > I am happy to pay a reasonable price for the right PDP-8, so a seller > won't be > > disappointed. > > > > Thanks and best regards > > Tom Hunter > >
Re: DEC PDP-8/E wanted - still looking
We'll see. At the moment I'm not interested in selling either of the 8/L's. The 8/E is a bit more complicated, will have to think about that. C On 11/26/2020 1:01 AM, Tom Hunter via cctalk wrote: Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer complete with front-panel and IO board is on its way to me. :-) I am still looking to buy one of the following PDP-8 models: PDP-8/F PDP-8/E PDP-8/L PDP-8/I PDP-8/M Dave, Chris, Paul and Robert I am looking forward to getting more details from you. I am happy to pay a reasonable price for the right PDP-8, so a seller won't be disappointed. Thanks and best regards Tom Hunter
RE: DEC PDP-8/E wanted - still looking
Tom, If it has an IOB6120 then it the VT emulation kills the Fortran run time system in OS8. Dave G4UGM > -Original Message- > From: cctalk On Behalf Of Tom Hunter via > cctalk > Sent: 26 November 2020 06:02 > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: DEC PDP-8/E wanted - still looking > > Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer > complete > with front-panel and IO board is on its way to me. :-) > > I am still looking to buy one of the following PDP-8 models: > > PDP-8/F > PDP-8/E > PDP-8/L > PDP-8/I > PDP-8/M > > Dave, Chris, Paul and Robert I am looking forward to getting more details > from you. > > I am happy to pay a reasonable price for the right PDP-8, so a seller won't be > disappointed. > > Thanks and best regards > Tom Hunter
DEC PDP-8/E wanted - still looking
Tom Uban fully built "Spare Time Gizmos" SBC6120 based computer complete with front-panel and IO board is on its way to me. :-) I am still looking to buy one of the following PDP-8 models: PDP-8/F PDP-8/E PDP-8/L PDP-8/I PDP-8/M Dave, Chris, Paul and Robert I am looking forward to getting more details from you. I am happy to pay a reasonable price for the right PDP-8, so a seller won't be disappointed. Thanks and best regards Tom Hunter
