From 2004 to 2019 a Yahoo group was active, dedicated to the UCSD p-System.
Many discussions and files were added to this group.
When Yahoo decided to shut down groups I made a dump of files and messages in 2019
Yahoo files archive
Yahoo messages in one big text file with meta information
Most files have found their way into the applicable UCSD page also.
The groups lives on at groups.io at https://groups.io/g/UCSDPascal
File : /Compiler/UCSDCMPA.PAS
Description : Source File 1 of 6 of UCSD Pascal Compiler for the PDP-11 From Compuserve
File : /I56502.DSK
Description : This is an Apple 2 floppy image of a hacked system.apple to run I.5 pcodes with a I.5 system in it
File : /I5forPC/Interp7.exe
Description : Experimental interp for I.5 pcodes on the PC, runs under MSDOS/Windows with normal dos files
File : /Ucsdramd
Description : RAMDrive software for many versions pf Apple Pascal
File : /15SYS1.VOL
Description : Disk 1 of the UCSD PASCAL I.5 system with source, for CP/M. This is a 360k disk image mountavle as avolume by the PC dos hosted p-system
File : /ADAP6502.VOL
Description : 6502 adaptable psystem from OSI disk
File : /VOLITION.VOL
Description : BOOTABLE Volition System's II.0 p-code system that hosted their modula-2 compiler
File : /psystem1.zip
Description : DOS hosted psystem executables part 1
File : /IV2UTILS.VOL
Description : DOS hosted psystem part 2
File : /PECAN.VOL
Description : Part of DOS hosted package
File : /RAINBOW.zip
Description : Rainbow pascal disks converted to DOS hosted files
File : /UCSDEDIT.ZIP
Description : Complete source code for the E.4 editor (SYSTEM.EDITOR). You saw it here first!
File : /CPMADAPT.zip
Description : CP/M Adaptable system
File : /Adap40.zip
Description : Documentation for Installation of the Adaptabe IV.0 UCSD Pascal
File : /Global20.txt
Description : GLOBAL DECLARATIONS FOR UCSD PASCAL II.0
File : /Global30.txt
Description : GLOBAL DECLARATIONS FOR UCSD PASCAL III.0
File : /AltosUCSDII.0 ? Z80.sit
Description : UCSD II.0 ? 8" disk images of Z80 Altos, missing asm ?
File : /MostekUCSDI.5Z80.sit
Description : UCSD 1.5 8" working images Z80 Mostek
File : /RevEngII/FILER.TEXT
Description : Filer source created from version 1.1 of Apple Pascal
File : /UCSDCPM.zip
Description : source of 8080 UCSD Interpreter II.0 CP/M boot
File : /1.5 Mostek Z80.zip
Description : UCSD 1.5 Mostek Z80 in zip archive
File : /psys22.zip
Description : MS DOS host based p-system IV2.2 R1.1
File : /Disassembly stuff/p-decode.zip
Description : Sent to me by Richard Stearn for uploading here
File : /Disk images/Apple II/ATTACH1.do
Description : Disk distributed by the Philadelphia Area Computer Society (PACS)
File : /Disk images/Apple II/ATTACH2.do
File : /Z80INTERP20.zip
Description : Complete source code for the Z80 interp for II.0 under CP/m
File : /ucsd_pme-0.1.0.tgz
Description : A UCSD I.5 interpreter for Unix
File : /Disk images/Apple II/PPMPATCH.SDK
Description : A ShrinkIt archive of a disk containing Pascal Partition Manager patched so that PPM will work with 3.5 inch drives and drives connected to Apple SCSI cards
File : /Version II stuff/ODMSCU.TEXT
Description : A generic screen unit from Arley Dealey of Volition Systems. This unit peeks as system.miscinfo to work out how to move cursor and clear screen
File : /I5forPC/pc157g.zip
Description : Source for a DOS I.5 cross compiler
File : /I5forPC/interp7src.zip
Description : Source for INTERP7.EXE, the I.5 interp under Dos, in Borland Pascal 7
File : /I5forPC/PC157Jsrc.ZIP
Description : Source for p-code compiler to generate I.5 pcodes, based on original UCSD I.5 compiler. Runs under the I.5 interp like this: "INTERP7 PC157J"
File : /COMPIV/COMP41.PAS
Description : Compiler source ver IV.13
: /COMPIV/COMPIV.PAS=20
Description : Compiler source ver IV.13=20
File : /Release III (MicroEngine) src/psystem-III.zip
Description : Release III system sources
File : /Release III (MicroEngine) src/compiler-III.zip
Description : Release III compiler sources
File : /Release III (MicroEngine) src/calc-III.zip
Description : Release III calculator source
File : /Release III (MicroEngine) src/peditor-III.zip
Description : Release III editor sources
File : /SOURCEIV.ZIP
Description : Source code for IV.13 and some IV.2 15 named disks
File : /Laurie's Utilities/PSYSNSI.ZIP
Description : DOS utility to extract files from a p-system .VOL image
File : /TI/UCSD Compiler.pdf
Description : UCSD Compiler manual IV.0 for TI-99
File : /SUDOKU.PAS
Description : sudoku solver in UCSD Pascal
File : /Apple2Pascal1.1IntDisasm.pdf
Description : Apple II Pascal 1.1 P-code interpreter disasm by Willi Kusche
File : /PrelimGuideToApplePascalInterfacingForeignHardware.pdf
Description : Scan of the Preliminary Apple Pascal Guide to Interfacing Foreign Hardwary - 10 Dec 1979
File : /Disk images/Apple II/BOOTPPM.DSK
Description : ProFile Partition Manager patched to allow creating an Apple Pascal area in ProDOS volumes using AppleWin
File : /AppleIV/BOOTSEC.SHK
Description : Source for boot sectors and a listing file
File : /Tiny Pascal Compiler/Tiny Pascal Compiler.txt
Description : Tiny Pascal compiler (TRS-80, Model III)
File : /Tiny Pascal Compiler.txt
Description : Tiny Pascal compiler (TRS-80, Model III)
File : /Laurie's Utilities/FloppyRead.zip
Description : Updated EXE and source in Delphi 3, Now handles any size 8 inch disc image
File : /Laurie's Utilities/PSYSREAD.ZIP
Description : Windows program to read and extract files from ANY p-system .VOL image. Includes Delphi source and EXE
File : /Laurie's Utilities/z80Emulator.zip
Description : For a windows based machine. This is an emulator that will boot and run disc images of II.0, I.5 and I.4. It emulates the Z80 or 8080 SYSTEM.MICRO or SYSTEM.INTERP on these disc images. Stable images for the previous versions are included.
File : /Laurie's Utilities/Z80EMSource.zip
Description : Source code for the z80 emulator in Delphi 7. No machine code is used so it should be portable to Lazarus. I just need a decent CRT component to make it work in Lazarus/Linux
File : /Laurie's Utilities/PascalBooter.zip
Description : The emulator will need PASCAL.COM to bootstrap the floppy. Here is the 8080 source code
File : /bootable-rk0.dsk.gz
Description : PDP11 bootable RK05 ucsdII.0 disk image
File : /PDP11 stuff/bootable-rk05.zip
Description : Ron Young's bootable RT-11 disc image for building PDP-11 II.0 interp. Use the simh PDP-11 emulator.
File : /VERSION IV21 RUNTIME STUFF/RSP FOR IV21.ZIP
Description : Runtime support for IV.13 and IV.21
File : /VERSION IV21 RUNTIME STUFF/BIOS FOR IV21.ZIP
Description : Bios for IV.13 and IV.21
File : /Disk images/IBM PC/SYSTEM2.IMD
Description : IV.0 Release 1. One of 2 disks for the IBM PC, made with Dave Dunfield's Image disk utility.
File : /Disk images/IBM PC/FORTRAN.IMD
Description : UCSD Fortran Compiler for IBM PC
File : /CHARSET/terak.video.display.pdf
Description : Description of Terac video display
File : /USUS Newsletters/Compression Test - USUS Newsletter V4N3 1990-05_06.pdf
Description : Should I compress more like this (CCITT G4, 60% typ. reduction)?
File : /TI/UCSD Turtlegraphics manual.rtf
Description : UCSD Turtlegraphics Manual for the TI-99
File : /TI/ASM-LNK.DSK
Description : UCSD Pascal assembler linker disk
File : /TI/COMPILER.DSK
Description : UCSD Pascal compiler disk
File : /TI/EDT-FIL.DSK
Description : UCSD Pascal Editor Filer disk
File : /TI/UCSD-UTI.DSK
Description : UCSD Pascal Utilities disk
File : /TI/UCSD_p_system_Editor_Files_Utilities_Part_1_Editor.pdf
Description : UCSD Pascal Editor manual
File : /TI/UCSD_p_system_Editor_Files_Utilities_Part_2_Filer.pdf
Description : UCSD Pascal Filer manual
File : /TI/UCSD_p_system_Editor_Files_Utilities_Part_3_Utilities.pdf
Description : UCSD Pascal Utilities manual
File : /PPMEXAMP.ZIP
Description : Example of a ProDOS volume containing images of all four disks comprising UCSD Pascal version 1.2 plus the Pascal Partition Manager needed to maintain the ProDOS volume
File : /Internals/softech microsystems p-systems reference.pdf
Description : Softech Microsystems p-System Reference
File : /Laurie's Utilities/AppleRead.zip
Description : AppleRead.exe will allow you to convert an Apple II pascal disk image (.DSK) to a .VOL file that the p-system can mount. Source and EXE in Delphi 7 included. The .VOL file can also be read by PSYSREAD.EXE (located in the file section).
File : /Laurie's Utilities/Z80EM2010.zip
Description : 2019 Update of my Z80 emulator, written in Delphi 7, boots and runs raw CP/M disc images of I.4, I.5 and II.0 UCSD. Full source enclosed.