Changes

The ROM they provided had your address and serial number encoded on the ROM. A script has been written to update these details which can be downloaded from [https://github.com/cormacj/AmstradCPCRomHacks here].

All {| class="wikitable"|-! scope="col" width="100" | RSX commands are defined ! Details|-| <nowiki>|EMS</nowiki>| rowspan="2" | Starts CP/M Plus from ROM and shows the CP/M Plus expansion ROMs with their names. CP/M Plus is configured for two drives and the RAM drive C: with 444 KB RAM.|-| <nowiki>|O</nowiki>|-| <nowiki>|PASSWORD</nowiki>| This command asks you for a password. If you enter it three times wrong then CP/M Plus will be started from ROM. The default password in the available 2.34 ROM 1is <code>SPLINTER</code>|-| <nowiki>|PW</nowiki>| If the password was entered correctly using <nowiki>|PASSWORD</nowiki> then <nowiki>|PW</nowiki> will do nothing. If the password was not entered, or entered incorrectly then it will start CP/M, just like <nowiki>|EMS</nowiki> |-| <nowiki>|OP</nowiki>| This RSX command activates a menu system, which allows you to launch a .COM or .SUB file in an automatic way. An error message will be displayed if there is no .COM or .SUB file on disc. You can choose the file of choice with SPACE and start it with RETURN. CP/M PLUS with the RAM Disc will be started and the selected file will be launched. <p>Note: Some print routine are incompatible, for example this is the case for X-DDOS. Switch off if you find problems.|-| <nowiki>|VER</nowiki>| rowspan="2" | These commands are both identical. They show the Copyright message for CP/M PLUS and the CPM ROMs. Additionally, the serial number and the name of the user is also printed.|-| <nowiki>|CPMVER</nowiki>||-| <nowiki>|MYNAME</nowiki>| Displays the name of the user/buyer of this set of CP/M Plus ROMs on screen.

* <nowiki>|CPMVER and |VER - This shows:MYNAME</nowiki> by itself just prints the ROM owner name.

" CPM PLUS is copyright : - AMSTRAD CONSUMER ELECTRONICS PLC. & DIGITAL RESEARCH. CPM ROM by Graduate software. This rom is version 2.23 : - SERIAL NUMBER : 1232-GRAD102 OWNER : <namenowiki> "|MYNAME,1<name/nowiki> is the person who the rom was made forprints owner and serial number.

* <nowiki>|MYNAME shows:,2</nowiki> prints owner, serial and address. |-| <nowiki>|OHELP</nowiki>| rowspan="2" | These commands are both identical. They list any CP/M Plus expansion ROMs containing programs (if installed). showing their nameand position (ROM number). Using <nowiki> |OHELP</nowiki>,number or <nowiki>|EMSHELP</nowiki>,number will display the applications contained in CP/M Plus expansion ROM #number, for example <nowiki>|OHELP,6</nowiki>|-| <nowiki>|EMSHELP</nowiki>||-| <nowiki>|NOCPM</nowiki>| This RSX command will switch OFF the CP/M Plus expansion ROMs. All other ROMs will be initialiized again.|-|}

" CPM PLUS These commands are: Accessory Roms attached

{| class="wikitable"! CommandIt lists ! Description|-| 24LINE || ensures the names scrolling error messages at bottom of the attached accessory ROMs.screen|-| 25LINE || turns off that status line and puts any error message on screen under the bad command* |EMS - starts CPM+ | AMSDOS || the 1K disc utility which ensures a clean exit from CP/M|-| BUILTIN || tells you all commands in your ROM |-| BORDER || changes the colour as in Locomotive BASIC* |PASSWORD - this | CAT || exists for those who resist DIR, again giving you an alphabetical sort and free space|-| CLS || clears the screen just as in BASIC, homes the cursor but does not affect screen mode|-| DATE || is supposed to display the system date and time.|-| DETAILS || inform you about the system set-up|-| EXPAND || assigns a character string to a lone keystroke|-| HOME || sends the cursor to the top left-hand corner of the screen without clearing the screen|-| INK || works as in BASIC|-| INVERSE || gives paper-on-ink colours, or reversed display, until the NORMAL command is given|-| KDS || controls the optional 8-bit port, if you have one|-| LANGUAGE || accesses the various character sets available|-| LPRINT || dumps a "?" prompt file to your printer|-| MODE || for columns on screen, as in AMSDOS|-| PALETTE || changes screen colours easily|-| PAPER and asks INK || do what normally happens in BASIC|-| ROMCAT || tells you to enter what's on-board other accessory ROMs|-| SETLST || initialises the passwordprinter|-| SET24X80 || a single command combining MODE 2 and 24LINE functions, so existing PROFILE.SUB files need not be modifiedThe password |-| CKEY || allocates an ASCII code to a Control+key combination|-| NKEY || for the distributed roms is "SPLINTER"normal key assignment|-| SKEY || uses shift+key for ASCII assignment|-| SIGNON || lists accessory ROMs available for use under CP/M|-| WAIT || prompts user for keypress|}

[[User:Cormacj|CormacJ]] has written a python script to create accessory ROMS and also extract .COM files from ROMS. You can view this at his [https://github.com/cormacj/AmstradCPCRomHacks?tab=readme-ov-file#make_accessory_rompy AmstradCPCRomHacks] repository Some emulators don't support the accessory ROMs because of the non-standard format. Arnold and Caprice32 supports these. Caprice32 doesn't support it, but there is a pull request open to have this added.

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2. Accessory ROM name is ASCII string terminated with '$'. Graduate's Accessory ROM 1 is called "CP/M Accessory Rom 1\r\n$". You need to provide a description. At a minimum '$' on it's own is ok. The code displays the string and doesn't check if it goes past the space allocated in the ROM. Some documentation notes that this can be 32 characters long, but the Graduate Software roms will only display up to 22 characters.

* [[http://futureos.cpc-live.com/ Future OS website, home of ROM Manager and TFM's Accessory ROMs]]* [https://github.com/cormacj/AmstradCPCRomHacks A python script Python scripts to update build your own accessory roms and to patch the CPM rom to update user, address, serial and passwordmessage]