Yet another computer museum
PX-8 ROM images

All these are zipped HEX files. Hex is short for HEX-Intel, an interchange format knwon to most stand alone EPROM programmers. Conversion from and to HEX can be done with hexbin.

Note that these ROMs contain copyrighted (but abandoned) software. If someone has a problem with this, let me know.

Portable WordStar, Scheduler and Calc were programs marketed by MicroPro. For the current situation on WordStar see: Wordstar Resource Group History page)

• Basic the Microsoft^© basic ROM (M25040CA)
  
• Utils the utilities ROM (M25046CA) contains: PIP.COM, STAT.COM, SUBMIT.COM, XSUB.COM, FILINK.COM, TERM.COM, CONFIG.COM
• Pcalc the Portable CALC and Scheduler ROM (M25044CA)
• Pws the Portable Wordstar ROM (M25042CA)
  
• Intext 1.0 Talbot Intext word processor 1.0 with communication (16 kByte ROM).
• Intext 1.1 Talbot Intext word processor 1.1 with communication (32 kByte ROM).
• Oval "IRM" 2.7 Integrated Resource Manager (16 kByte ROM).
• CardBox "Business Simulations Portable Cardbox - Plus", reconstructed ROM. CardBox is still in business.
  
• dBase II rom set thanks to Ricardo
  
• 601 some weird utilities. Found them in my dead Geneva
• 602 same source as 601.
• Manudax Utilities DU.COM, DUMP.COM, FILINK.COM, PIP.COM, SD.COM, ZSID.COM.
• RAMTEST A PX-4 & PX-8 D-RAM test OS replacement. Disassembly included. A short manual.
• Test ROM for the PX-8, this is described in the Technical manual page 5-1
• Px8os1.zip the operating system ROM. Has no file system, but contains code for the main processor, including the CP/M system. (M25030CA)
• Y2k version of the operating system ROM
(M25030CB) allows entering the year between 00 and 76 at initial reset
• Turbo Pascal 3.01 thanks to Peter Dassow. I added a hex version for real EPROM programmers.
• Turbo Pascal 3.01, no backup file thanks to Peter Dassow. I added a hex version for real EPROM programmers.
• Geneva Connection communications ROM (8kByte). Thanks to Jon Guidry
  
• SuperCalc spreadsheet program in two ROMs. The original Epson ROM numbers are M25093CA and M25094CA. Thanks to Jon Guidry
  
• Traveling Expense Manager program to administer your traveling expenses. Thanks to Jon Guidry
  
• Traveling Time Manager program to administer your traveling time. Thanks to Jon Guidry
  
• font file for the HC-80/PX-8. The FONT.ROM is from Toshiya TAKEDA. the FONT.TXT is an editor friendly view of the contents.
• ROM dump RAM DISK UNIT 120 (Intelligent RAM disk)
• Dakcom v1.1 (c)1986 c.harris Thanks to Jon Guidry
• ROMs for the Oval UD-80 (PX-8 & PX-4 versions) and the DS-8 (for the PX-8 B: or C: socket) Thanks to Crashedfiesta

The following ROMS are tested only with the emulator and will work with the latest version (2017-04-02) only. Previous versions of the emulator did not support ROM sizes other than 32 kByte.

• CLOCK ported with z88dk Thanks to Stefano Bodrato
• DSTAR ported with z88dk Thanks to Stefano Bodrato
  
• OTHELLO ported with z88dk Thanks to Stefano Bodrato
  

The PX-8 uses special cradles to insert (EP)ROMs, but these are not essential. If you bend all the pins untill they point all exactly downwards, you can insert an EPROM without a cradle with some care. The cradle socket connect pins fixate the EPROM pins. Be careful with removing the EPROM, as too much sideways force might bend the socket connections.

The words ROM and EPROM are used almost interchangeble, and in most cases they are. Only if you want to (re)program one there is a difference. With true ROMs, you can't. With EPROMs, you need an eraser (UV-C source) and a programmer.

Back to main PX-8 page

Last updated: 2026-05-27

Email: fjkraan@electrickery.nl