Amiga DiagROM Downloadpage

Here you will be able to download my DiagnosticRom for the Amiga.

The file is a ZIP-File and will contain 6 files:

DiagROM – To be used in an emulator like WinUAE (does not really makes a point)
16bit.bin – Files for 16 Bit roms, like A500, A2000, A600, Already byteswapped
32bit-HI.bin – Files for 32 Bit roms like A1200, A3000, A4000, HIGH Word, Byteswapped
32bit-LO.bin – Same as above but LOW Word
readme.txt – Basically the history at this page.
RomStartup.txt – Explanation of startup sequence of ROM


HI ROM is to be used at: U6A – Amiga 1200, U175 – Amiga 4000, U181 – Amiga 3000
LO ROM is to be used at: U6B – Amiga 1200, U176 – Amiga 4000, U180 – Amiga 3000


For CD32:
Take a 27C800 prom, either join the hi and lo files, in order first “HI” and then “LO”. Or as I have a 27C4096->27C400 adapter with jumpers for banks.
Set it to bank 0, program “HI” then put adapter in bank 1 and program “LO” and it will work.

Stable file is ONLY updated at every versionbump. (noted in History text here)


Please send ANY bugreports via email to: bugreport<at>






Want to donate? Sure thanx use this link for that:



2017-07-30: Added possability to run on A1000 as bootstraprom. I have removed moduletesting and gfx test-screemn to save space.
Some additional bugfixes.

2017-07-06: Fixed a bug, when setting DTR high I accidentally put Dikdrive motor on!
when no chipmem is foundand no fastmem, instead of just flashing a green screen, it now checks memaddr $400
and shows in stripes biterrors. bright color=bit working, dark=bit error. evbery 15 frame it flashes and steps +4 bytes of memaddr to check

2017-06-17: Oh! yes long time. Now DiagROM is opensource avaible at
Totally rewritten Autoconfig, now handles Z2 and Z3 and should be working. if you get stuck in a loop (autoconfig not working) it
will halt after 32 “boards”.
Also in ManualEdit mode, I have inlcuded a function to turn on/off cache. to debug cacheissues on CPU Cards.
BE CAREFUL! this WILL crash if you run it on a 68000/010
Also fixed bug of garbage in menus.

2017-04-15: Added Support for OKI Chipset in RTC Test
Added (somewhat experimental) support for Autoconfig for Z2 boards.
Must say thanx to Terriblefire for autoconfig code. (with some changes by my)
Added test at startup to see if CPU can do odd/even byte read and writes
Bumped version to V0.9 – Next Stable release
Released while being at the Revision demoparty.


2017-02-25: Moved mainmenu alternatives to make space for more maintest-menus. also added some for future use.
Started on Others tests/RTC Test for the moment only showing ricoh RTC chip (A4k etc)
Removed temprary debugfunction added the 18:th.

2017-02-18: Minor changes. sometimes when exiting a testscreen you got to the mainmanu instead of the submenu. cleaned up now.
also added a fakefastmem allocation at the boot so you can run stuff in fakefast by pressing LBM at poweron if needed.
TEMPORARY DEBUGFUNCTION: while dumping serialport at beginnning, screen also flickers while doing a serial timeout.
this is to figure out if machine still runs to veryfy I can do serialstuff (and detect failures) if paula is missing.
will be removed soon as it screws up onscreen colorcodes.

2017-02-15: Added a testpicture, testscreen is moved in menu and will still bug. this will be reworked soon.

2017-02-04: Simple audiotest is now improved, it now plays different waveforms, I have checked the frequencys with my Rigol scope.
But 20.6Hz in my headphones sounds weird, maybe should remove it in the test. the only thing not working there now is setting volume.

2017-01-30: In Manual edit: added when using “goto memoryaddress” when pressing x it clears the string totally. Also hopefully fixed keyboardbug making
it more or less impossible to use keyboard on some machines.
Fixed bug showing strange flickering spritebugs random
Changed that in initial chipmemdetecting it checks more combinations of bits, this will make detect slower (due to serial output) but will detect more
TEMPORARY function: pressing fire/mousebutton in joystickport while poweron will totally disable serialoutput. this is to be able to run with broken
Paula. Will look into a better solution. so function will maybe be removed.
Added a testmodule, A groupmember will make a chipmodule for me later to have here. Now using the classic “Echoing”

2017-01-06: Long time since last update.  Hollidays etc.  Anyway some minor internal fixes and a basic low-res testscreen added.

2016-10-22: Fixed bugs in new Chipmemdetection that made it not detect any chipmem if there was missing/Broken chipmem in the beginning.
Added errorhandling in the startprocess, so it can show on serialport if there was a exceptionerror. also will show colorcodes on screen.
done some smaller bigfixes. Will bump versionnumber and this will be the stable version. It will take a while until next stable version is
bumped. Need to do floppy, serial, paralell tests etc before that will happen. but you always have the daily version.

2016-10-12: New Chipmem detection now handles shadowram so it should stop detecting memory instead of giving false 2MB Chip.
IF no Chipmem avaible and machine can detect fastmem (NON autoconfig. more or less only A3000/4000 motherboardmem) it will now
start using fastmem only. (screen flickers in different colors instead of printing text, nullmodem only)
Fixed addresserrorbugs at CIA and joystickport tests on machines with 68000CPU. also should have correct CIA timing on slow machines.
IF fastmemshadowram is detected during memorytests, test will exit. MANUAL test have a option to disable that test.

2016-10-07: LONG time no updates. Familystuff. Anyway. decided to do a total redo of initcode especially chipmemdetection.
Detection is slower, but progress is printed on serialport so you can see address checked and if failure (in the beginning of the detection)
you will see what it wrote and what is read to help debugging of chipmemproblems. Screen should flicker in green while detecting.
drawback is that some tests (cia and joyport tests) now generates an addresserror. Will have a look of that.

2016-08-05: Found the very VERY interesting bug making the right mousebuttin to act like it is STUCK on some machines. As you apparently should set the
port to OUTPUT before reading it. after doing that RMB now behaves correctly so hopefully no more “rainbow screens” and failing memorytests.
Anyway, time to release a new Stable version. tests are now more decent, they will be improved. YES but as it seems to work now and are getting
somewhere I decided to do this as next stable version.

2016-07-19: Vacationtime, not so much coding done. Found BIG bug making serial input not to work atall. also some more keyboardchanges even if keyboard is far from
perfect it should work better now, seems to work even better with serialoutput turned off but still VERY flaky at times. (in UAE it works perfect)
totally redesigned the inputroutine for input of hexaddresses, now not longer requiring 8 char long addresses.
at manualmemory-edit mode, system now allows scrolling up and down and added info about current memoryaddress.
lots of internal redesigns of routines.

2016-07-07: Complete new keyboardroutine. Hopefully it will work better on real machines, this time coded ON my A4000 instead of in UAE.

2016-07-05: Added a detect of working raster, if so raster will be used as a timer hopefully making keyboard and serialroutines to work better.
Serialport is now disabled if no key is pressed during boot when prompted. (or user press RMB during prompt)
Powerled now flashes during memorytests aswell, so user can see that something is happening on slow memory. like Chipmem.

2016-06-28: More Changes in timingroutines. Added a IRQ Level test. IRQ7 test REQUIRES that you have a IRQ7 button hacked to your machine.

2016-06-19: Some cosmetic changes of textoutput (added a function to center singleline-texts)
Added simple test of joystickports

2016-06-18: Made keyboardshortcuts in audiotests.
Simple keyboardtest added.

2016-06-11: Noticed that audiotestroutine was all screwed up due to my redesign of handling of inputdata.
Should now be fixed, now also keyboard can be used here.
due to the big bug, this will be also a “Stable” release even if I do not bump the versionnumber.

2016-06-03: Hopefully repaired keyboard input and maybe even serial.
Also stupid bug detected that older versions apparently sent data in 2400 BPS after a while
Big rework done in menu and inputhandling. Next “Stable” release as it is now at V0.6

2016-05-22: Keyboard and and serial INPUT may be damaged on some machines due to changes in handlinhgroutines and timings is a bitch. Will check
you can now use keyboard/serial cursor up/down to select items in menus. Mousehandling also better and do not skip bottom value in menu.
Manual memoryedit test is now operational so you can check any address in memory manually.
ANSI bugs should now also be removed in PuTTY etc.

2016-05-08: Serialhandling now improved, as there is no IRQ going on I have no means of do a interrupt at serialdata.
So now simply everytime I put out a char on the serialport I also read the serialport and puts any data in a buffer.
Now you should be able to move the cursor in manualedit mode. (that soon will be able to edit memory aswell while it reads memory
so you can see biterrors etc on that given address.)

2016-05-08: Serialhandlingroutine changed so now it actually uses a buffer. Hopefully you now can cancel memorytests etc.

2016-04-27: Hopefully keyboardroutines should work now even on physical machines – First Daily build

2016-04-22:  VERSION 0.5 – First Stable

First public beta

<History before Public release not on this screen>