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Groups > alt.folklore.computers > #234491
| From | Bob Eager <news0009@eager.cx> |
|---|---|
| Newsgroups | alt.folklore.computers |
| Subject | Re: TSS arcana, Self-hosting and the 6502 |
| Date | 2026-03-31 14:54 +0000 |
| Message-ID | <n325gqF2repU4@mid.individual.net> (permalink) |
| References | <10qehuo$2nu4m$1@dont-email.me> <10qenoj$2plle$1@dont-email.me> <10qf67n$2u8s$2@gal.iecc.com> <10qgm3p$3dj57$2@dont-email.me> |
On Tue, 31 Mar 2026 07:35:37 -0700, Peter Flass wrote: > On 3/30/26 17:58, John Levine wrote: >>> For TSS/360 all address constants have to be copied and relocated each >>> time a program is loaded, and then it needs two memory fetches instead >>> of one to access the referenced address. >> >> Sort of. TSS programs had CSECTs which were read-only and position >> independent with one copy shared among all processes, and PSECTs which >> were read-write and needed a separate copy per process which had >> pointers that were relocated when loaded. The calling sequence had a >> pair of addresses for each routine, one to the PSECT (the R-con) and >> one to the CSECT (the V-con). In retrospect it would have made more >> sense to use one address for the PSECT and pick up the code address >> from a known location in the PSECT. My guess is that they hoped there >> would be routines with no static data so they could skip the R-con, but >> as far as I know they never did that. >> >> It is easy to write position independent 360 code since all references >> are relative to base registers. You load a base register to point to >> wherever the code is (BALR R,0 was the usual way) and off you go. The >> routine would keep a pointer to the PSECT in another register set up >> from the calling sequence, >> so the routine can directly address both its code and its data without >> extra instructions. The calling sequence was slower than the OS/360 >> version, but even the OS version was quite slow with register saves and >> save area chaining. >> >> This isn't all that different from ELF shared libraries in Unix and >> linux, which have position independent pages and the PLT and GOT with >> process-specific pointers to the shared code. >> >> Shameless plug: my book Linkers and Loaders explains this all in much >> more detail. >> >> > Highly recommended. I have a copy sitting on my shelf now. I have every book in that series, if you're referring to the Macdonald/ Elsevier set. I also have the Levine book. -- Using UNIX since v6 (1975)... Use the BIG mirror service in the UK: http://www.mirrorservice.org
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Re: Self-hosting and the 6502 Lev <thresh3@fastmail.com> - 2026-03-30 19:12 +0000
Re: Self-hosting and the 6502 David Wade <g4ugm@dave.invalid> - 2026-03-30 21:01 +0100
Re: Self-hosting and the 6502 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-03-30 21:02 +0000
Re: Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-03-31 00:44 +0000
Re: Self-hosting and the 6502 antispam@fricas.org (Waldek Hebisch) - 2026-03-31 19:46 +0000
Re: TSS, Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-03-31 20:48 +0000
Re: TSS, Self-hosting and the 6502 antispam@fricas.org (Waldek Hebisch) - 2026-04-01 23:23 +0000
Re: TSS, Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-04-02 10:53 +0000
Re: TSS, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-02 07:29 -0700
Re: TSS, Self-hosting and the 6502 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-04-02 16:58 +0000
Re: TSS, Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-02 20:34 +0000
Re: TSS, Self-hosting and the 6502 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-04-02 20:53 +0000
Re: Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-31 21:01 +0000
Re: Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-03 16:53 -1000
Re: Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-04 03:57 +0000
Re: Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-04 07:37 -0700
Re: Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-04-04 21:55 +0000
Re: Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-04 15:48 -0700
Re: ancient time sharingSelf-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-04-05 02:27 +0000
Re: Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-04 22:03 +0000
Re: Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-04 12:31 -1000
Re: Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-04 07:40 -1000
Re: Self-hosting and the 6502 Lars Poulsen <lars@beagle-ears.com> - 2026-04-04 13:44 -0700
Re: Self-hosting and the 6502 (VSCP) ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2026-04-05 20:23 +0000
Re: Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-04 12:53 -1000
Re: Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-04 23:44 +0000
Re: Self-hosting and the 6502 David Wade <g4ugm@dave.invalid> - 2026-04-05 09:29 +0100
Re: CMS, Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-04-05 19:22 +0000
Re: CMS, Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-05 14:30 -1000
Re: CMS, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-05 20:02 -0700
history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-11 09:05 -0300
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Jeroen Belleman <jeroen@nospam.please> - 2026-09-11 16:49 +0200
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Andy Burns <usenet@andyburns.uk> - 2026-09-11 15:58 +0100
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-11 13:38 -0300
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Jeroen Belleman <jeroen@nospam.please> - 2026-09-11 19:41 +0200
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Andy Burns <usenet@andyburns.uk> - 2026-09-11 19:18 +0100
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Jeroen Belleman <jeroen@nospam.please> - 2026-09-11 21:27 +0200
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) scott@slp53.sl.home (Scott Lurndal) - 2026-09-11 21:13 +0000
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-12 14:47 -1000
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lars Poulsen <lars@beagle-ears.com> - 2026-09-13 15:02 -0700
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-13 16:27 -0700
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-14 15:11 -1000
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 04:19 +0000
Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Lars Poulsen <lars@beagle-ears.com> - 2026-09-13 14:56 -0700
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 04:10 +0000
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Lars Poulsen <lars@beagle-ears.com> - 2026-09-15 05:46 -0700
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Peter Flass <Peter@Iron-Spring.com> - 2026-09-15 07:51 -0700
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 23:22 +0000
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 23:13 +0000
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) Jeroen Belleman <jeroen@nospam.please> - 2026-09-15 16:48 +0200
Re: Computes at CERN (Re: history of ASCII and IBM ratfucking, and the VAX ) John Ames <commodorejohn@gmail.com> - 2026-09-15 08:19 -0700
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-12 14:13 -1000
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-12 14:12 -1000
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-13 14:02 -0300
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Andy Burns <usenet@andyburns.uk> - 2026-09-13 18:55 +0100
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Andy Burns <usenet@andyburns.uk> - 2026-09-13 19:03 +0100
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Andy Burns <usenet@andyburns.uk> - 2026-09-13 19:07 +0100
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-13 16:21 -0700
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-14 00:37 +0100
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-13 20:56 -0700
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-14 04:12 +0000
Re: history of ASCII and IBM ratfucking, and the VAX (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-14 15:06 -1000
Re: CMS, Self-hosting and the 6502 antispam@fricas.org (Waldek Hebisch) - 2026-04-06 01:42 +0000
Re: CMS, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-05 20:05 -0700
Re: CMS, Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-06 07:03 +0000
Re: CMS, Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-05 22:19 -1000
Re: CMS, Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-06 08:20 +0000
Re: CMS, Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-04-06 12:03 +0000
Re: CMS, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-06 07:30 -0700
Re: CMS, Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-06 07:39 -1000
Re: CMS, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-06 12:05 -0700
Re: CMS, Self-hosting and the 6502 Lynn Wheeler <lynn@garlic.com> - 2026-04-06 17:41 -1000
position-independent code (was Re: CMS, Self-hosting and the 6502) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-11 09:42 -0300
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-12 15:12 -1000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) John Levine <johnl@taugh.com> - 2026-09-13 01:57 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-12 21:14 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) legalize+jeeves@mail.xmission.com (Richard) - 2026-09-17 17:06 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) scott@slp53.sl.home (Scott Lurndal) - 2026-09-17 17:56 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) legalize+jeeves@mail.xmission.com (Richard) - 2026-09-18 14:08 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-18 19:29 +0100
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) John Ames <commodorejohn@gmail.com> - 2026-09-18 12:00 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-18 20:35 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Andy Valencia <vandys@vsta.org> - 2026-09-17 11:32 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) James Dow Allen <user4353@newsgrouper.org.invalid> - 2026-09-13 07:31 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-13 07:45 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) John Levine <johnl@taugh.com> - 2026-09-13 16:50 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-13 16:18 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 04:21 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) scott@slp53.sl.home (Scott Lurndal) - 2026-09-15 14:33 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-15 07:37 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 23:35 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Lynn Wheeler <lynn@garlic.com> - 2026-09-14 14:41 -1000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) John Levine <johnl@taugh.com> - 2026-09-13 01:54 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-13 14:53 -0300
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) John Levine <johnl@taugh.com> - 2026-09-13 22:18 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Peter Flass <Peter@Iron-Spring.com> - 2026-09-13 16:24 -0700
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-14 01:51 +0000
Re: position-independent code (was Re: CMS, Self-hosting and the 6502) scott@slp53.sl.home (Scott Lurndal) - 2026-09-14 14:53 +0000
Re: CMS, Self-hosting and the 6502 antispam@fricas.org (Waldek Hebisch) - 2026-04-06 19:21 +0000
Re: CMS, Self-hosting and the 6502 David Wade <g4ugm@dave.invalid> - 2026-04-06 21:25 +0100
Re: Self-hosting and the 6502 antispam@fricas.org (Waldek Hebisch) - 2026-03-31 02:32 +0000
Re: Self-hosting and the 6502 Bill Findlay <findlaybill@blueyonder.co.uk> - 2026-03-31 04:06 +0100
Re: Self-hosting and the 6502 David Wade <g4ugm@dave.invalid> - 2026-03-31 08:52 +0100
Re: Self-hosting and the 6502 Bill Findlay <findlaybill@blueyonder.co.uk> - 2026-03-31 18:07 +0100
Re: Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-03-30 13:51 -0700
Re: TSS arcana, Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-03-31 00:58 +0000
Re: TSS arcana, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-03-31 07:35 -0700
Re: TSS arcana, Self-hosting and the 6502 Bob Eager <news0009@eager.cx> - 2026-03-31 14:54 +0000
Re: TSS arcana, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-03-31 13:01 -0700
Re: TSS arcana, Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-03-31 22:14 +0000
Re: TSS arcana, Self-hosting and the 6502 Bob Eager <news0009@eager.cx> - 2026-03-31 22:32 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-04-01 02:06 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 Bob Eager <news0009@eager.cx> - 2026-04-01 09:53 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-04-01 16:07 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 Bob Eager <news0009@eager.cx> - 2026-04-01 16:27 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-04-01 16:10 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 Andy Walker <anw@cuboid.co.uk> - 2026-04-01 17:15 +0100
Re: linkers, TSS arcana, Self-hosting and the 6502 Bob Eager <news0009@eager.cx> - 2026-04-01 16:28 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 scott@slp53.sl.home (Scott Lurndal) - 2026-04-01 16:48 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-04-01 17:44 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-04-01 14:21 -0700
Re: linkers, TSS arcana, Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-01 20:40 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 scott@slp53.sl.home (Scott Lurndal) - 2026-04-01 22:02 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 Andy Walker <anw@cuboid.co.uk> - 2026-04-02 15:28 +0100
Re: linkers, TSS arcana, Self-hosting and the 6502 scott@slp53.sl.home (Scott Lurndal) - 2026-04-02 15:36 +0000
Re: linkers, TSS arcana, Self-hosting and the 6502 Andy Walker <anw@cuboid.co.uk> - 2026-04-02 17:15 +0100
Re: linkers, TSS arcana, Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-04-02 16:44 +0000
Re: Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-30 21:30 +0000
Re: Self-hosting and the 6502 David Wade <g4ugm@dave.invalid> - 2026-03-30 23:28 +0100
Re: Self-hosting and the 6502 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-30 23:36 +0000
Re: Self-hosting and the 6502 John Ames <commodorejohn@gmail.com> - 2026-03-31 07:46 -0700
Re: Self-hosting and the 6502 snipeco.2@gmail.com (Sn!pe) - 2026-03-31 15:54 +0100
Re: Self-hosting and the 6502 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-03-31 19:03 +0000
Re: VM history, was Self-hosting and the 6502 John Levine <johnl@taugh.com> - 2026-03-31 01:04 +0000
Re: VM history, was Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-03-31 22:17 +0000
Re: Self-hosting and the 6502 Peter Flass <Peter@Iron-Spring.com> - 2026-03-30 15:36 -0700
Re: Self-hosting and the 6502 cross@spitfire.i.gajendra.net (Dan Cross) - 2026-03-31 22:19 +0000
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