m_thompson
Veteran Member
The RICM received a large box of DEC and ECRM software with the scanner. I should make an inventory of the software that we have.
- VCF South West - June 14 - 16, Davidson-Gundy Alumni Center at University of Texas at Dallas
- VCF West - Aug 2 - 3, Computer History Museum, Mountain View, CA
- VCF Midwest - Sept 7 - 8 2024, Schaumburg, IL
- VCF SoCal - Mid February 2025, Location TBD, Southern CA
- VCF East - April 2025, Infoage Museum, Wall NJ
-
Please review our updated Terms and Rules here
PDP-8/m Powered OCR Scanner
- Thread starter m_thompson
- Start date
TypesettingGRU
Member
- Joined
- Nov 22, 2022
- Messages
- 12
That is a LARGE collection of software.
There was usually one plastic tray with just diagnostic programs.
The PDP-8 was bootstrapped qith a 32 word program entered via the Front Panel Switches.
This rudimentary program would load a paper tape, usually from a Teletype ASR-33 teleprinter.
This program was called the RIM Loader (Read In Mode?).
The RIM Loader program would then read in the BIN Loader (Binary) from paper tape.
____________________
7756: RFC
7757: RSF
7760: JMP 7757
7761: RFC RRB
7762: CLL RTL
7763: RTL
7764: SPA
7765: JMP 7757
7766: RTL
7767: RSF
7770: JMP 7767
7771: RFC RRB
7772: SNL
7773: DCA I 7776
7774: DCA 7776
7775: JMP 7757
7776: AND 0
7777: AND 0
_______________
in binary for loading via Switches
___________________________________
d 7756 6014
d 7757 6011
d 7760 5357
d 7761 6016
d 7762 7106
d 7763 7006
d 7764 7510
d 7765 5357
d 7766 7006
d 7767 6011
d 7770 5367
d 7771 6016
d 7772 7420
d 7773 3776
d 7774 3376
d 7775 5357
d 7776 0
d 7777 0
_______________
ignore the letter "D"
First Octal number is the address (12 bits).
You only need to enter the first address.
First Instruction is 6014 octal which means: 110 000 001 100
_______________
The ‘boot strap’ program for the PDP-8 is called the RIM loader. This tiny program can load programs in RIM format from the paper tape reader.
Generally the only thing the RIM loader is used for is to load the larger BIN loader which can read files in BIN format from the paper tape reader. The BIN loader is a much longer program and so you really don’t want to load that using the switch register.
There was usually one plastic tray with just diagnostic programs.
The PDP-8 was bootstrapped qith a 32 word program entered via the Front Panel Switches.
This rudimentary program would load a paper tape, usually from a Teletype ASR-33 teleprinter.
This program was called the RIM Loader (Read In Mode?).
The RIM Loader program would then read in the BIN Loader (Binary) from paper tape.
____________________
7756: RFC
7757: RSF
7760: JMP 7757
7761: RFC RRB
7762: CLL RTL
7763: RTL
7764: SPA
7765: JMP 7757
7766: RTL
7767: RSF
7770: JMP 7767
7771: RFC RRB
7772: SNL
7773: DCA I 7776
7774: DCA 7776
7775: JMP 7757
7776: AND 0
7777: AND 0
_______________
in binary for loading via Switches
___________________________________
d 7756 6014
d 7757 6011
d 7760 5357
d 7761 6016
d 7762 7106
d 7763 7006
d 7764 7510
d 7765 5357
d 7766 7006
d 7767 6011
d 7770 5367
d 7771 6016
d 7772 7420
d 7773 3776
d 7774 3376
d 7775 5357
d 7776 0
d 7777 0
_______________
ignore the letter "D"
First Octal number is the address (12 bits).
You only need to enter the first address.
First Instruction is 6014 octal which means: 110 000 001 100
_______________
The ‘boot strap’ program for the PDP-8 is called the RIM loader. This tiny program can load programs in RIM format from the paper tape reader.
Generally the only thing the RIM loader is used for is to load the larger BIN loader which can read files in BIN format from the paper tape reader. The BIN loader is a much longer program and so you really don’t want to load that using the switch register.