4 ms·

See https://xeroxparcarchive.computerhistory.org/_cdcsl_93-16_/.index.html https://xeroxparcarchive.computerhistory.org/_cdcsl_93-16_/.... -- it's from a CD-ROM

See https://xeroxparcarchive.computerhistory.org/_cdcsl_93-16_/.index.html https://xeroxparcarchive.computerhistory.org/_cdcsl_93-16_/.... -- it's from a CD-ROM attached to a Xerox blue&white at the time.

Rochus 3y ago
Great, thanks for the hint. Does someone know whether there is an easier way to download a directory tree than visiting one file after the other?
- pmcjones 3y ago
  wget?
  - Rochus 3y ago
    thanks for the hint; with the -r option I was indeed able to download the whole directory which took ~3.5 hours (31638 files, 18678 of which hidden, 942 MB in total); the tree includes 3441 .mesa files and ~1900 C source files, a lot of which apparently generated.
Rochus 3y ago
Meanwhile I implemented a little viewer (https://github.com/rochus-keller/Cedar/ https://github.com/rochus-keller/Cedar/ ) and started to study the source code, but was very surprised that there doesn't seem to be any object orientation. I had a look at Lampson's Cedar language description some years ago and had the impression that it included OO support, but this was apparently not implemented. I'm particularly interested because Wirth created Oberon after his second stay at PARC where he was exposed to the Cedar language and environment, and Oberon has inheritance (and there are quite many similarities of his Oberon System UI with the Cedar UI). The Cedar language version manifested in the now published source files (including the Solaris version by 1993) seems to be rather Mesa plus garbage collected structures implicitly "interiting" from ANY for late binding, but no general inheritance and apparently also no polymorphism. Do you have some inside information about this?
Rochus 3y ago
The CD includes a subdirectory called "ppcr/v1.13" with the note "We weren't able to include the source for ppcr with this CDROM, but you will find the header files here describing its interface." In the paper "Experiences Creating a Portable Cedar" (1989) by Atkinson et al. the PCR Runtime System is described. Do you happen to know whether this code is included in the now published archive somewhere. Or is it available somewhere else?

Rochus 3y ago

Great, thanks for the hint. Does someone know whether there is an easier way to download a directory tree than visiting one file after the other?

pmcjones 3y ago
wget?
- Rochus 3y ago
  thanks for the hint; with the -r option I was indeed able to download the whole directory which took ~3.5 hours (31638 files, 18678 of which hidden, 942 MB in total); the tree includes 3441 .mesa files and ~1900 C source files, a lot of which apparently generated.

Rochus 3y ago

Meanwhile I implemented a little viewer (https://github.com/rochus-keller/Cedar/ https://github.com/rochus-keller/Cedar/ ) and started to study the source code, but was very surprised that there doesn't seem to be any object orientation. I had a look at Lampson's Cedar language description some years ago and had the impression that it included OO support, but this was apparently not implemented. I'm particularly interested because Wirth created Oberon after his second stay at PARC where he was exposed to the Cedar language and environment, and Oberon has inheritance (and there are quite many similarities of his Oberon System UI with the Cedar UI). The Cedar language version manifested in the now published source files (including the Solaris version by 1993) seems to be rather Mesa plus garbage collected structures implicitly "interiting" from ANY for late binding, but no general inheritance and apparently also no polymorphism. Do you have some inside information about this?

Rochus 3y ago

The CD includes a subdirectory called "ppcr/v1.13" with the note "We weren't able to include the source for ppcr with this CDROM, but you will find the header files here describing its interface." In the paper "Experiences Creating a Portable Cedar" (1989) by Atkinson et al. the PCR Runtime System is described. Do you happen to know whether this code is included in the now published archive somewhere. Or is it available somewhere else?