HP Series 80 ROM Images

Introduction

The collection here includes all the ROMs I could get my hands on. If you have any other ROMs please send me their images. Details on how to copy a ROM are given below (but assume that you have the Assembler ROM).

Please note that the HP-83/85 ROMs are not compatible with the HP-86/87 ROMs. The former have 00085 prefix and white letters on their label, while the latter have 00087 prefix and yellow letters.

Description	Id (octal)	HP-83/85	HP-86/87
Printer/Plotter	360	ROM	ROM (Rev.B)
Advanced Programming	350	ROM	ROM (Rev.B)
Advanced Programming II	347	N/A	ROM (Rev.B)
Service ROM	340	ROM	N/A
Electronic Disk	321	N/A	ROM
Mass Storage	320	ROM	ROM
EMS	317	ROM	ROM
I/O	300	ROM (Rev.B)	ROM
Matrix 2	261	N/A	ROM
Matrix	260	ROM	ROM
Assembler	050	ROM	ROM
MIKSAM	016	N/A	ROM
Program Development	010	ROM (Rev.B)	N/A

Acknowledgments

I would like to thank


Alex Knight (The Calculator Museum) for the HP87 MATRIX2 and the Rev.B HP87 PLOTTER ROMs,
John Shadbolt (Vintage Computers) for the HP85 SERVICE and HP87 EMS ROMs, and
Glen Bear for the HP85 EMS ROM.

Dumping a Series 80 ROM

The following procedure was adapted from instructions given at the Vintage Computers site.

Prerequisites: The following procedure assumes that you have the Assembler ROM and a PC connected via the 82939A Serial Interface.

The Series 80 assembler has the command MEM that produces a memory dump of the specified locations. The command also accepts an optional ROM ID that allows MEM to switch the correct ROM bank before reading the memory contents. This provides an easy way of dumping ROM contents.

Please note that the HP-83/85 MEM command expects the ROM ID in decimal, while the HP-86/87 version expects it in octal.

With this proviso, the following discussion for the HP-86/87 applies to the HP-83/85 as well.

We need to determine the ID of the ROMs in our system. The following program dumps the headers of all the possible 253 ROMs to the serial port. We are only interested in the lines that start with the ROM ID, the rest correspond to nonexistent ROMs.

For example, the following command will print the first few locations of the Assembler ROM.

MEM 60000:50,2
050 330 012 140 132 140 072 140  (X `Z`:`

Since the first number was the ROM ID, then we know the ROM exists.

Run the program to determine which ROMs exist in your system.

100 CRT IS 10              ! send screen output to the serial port
120 FOR I = 2 TO 254
130   MEM 60000:OCT(I),2   ! print the first few bytes of the ROM
140 NEXT I
150 CRT IS 1               ! restore output to screen
160 END

Once you have the ROM ID of the ROM you want to dump to the serial port, you have to perform the following (here we assume that you want to dump the assembler ROM which has a ROM ID of 050):

CRT IS 10
DISP "ROM 50, ASSEMBLER"
MEM 60000:50,20000
CRT IS 1

The memory dump of the selected ROM will be printed on the serial port.

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