- Joined
- Aug 31, 2017
- Messages
- 125
Ευχαριστώ πολύ Seaside, θα αγοράσω sockets για τις μνήμες, θα σου στείλω PM με την διεύθυνσή μου για να μου στείλεις τις μνήμες για να τις δοκιμάσω.
Wow! It seems you have yet to create an account with us! Needless to say, you have to register in order to get the full "iamretro" experience! You will then be able to create your own topics, reply to posts and be an active member of the MOST prolific community in Greece (even further than that, but we're being modest for now). So don't delay! REGISTER!
Εχω το ειδικο πιστολι αλλα ειναι πανακριβο και παλι ζεσταινω την μητρικη με το πιστολακιΚαλό κόλπο! νόμιζα ότι θέλει ειδικό πιστόλι... για την επόμενη φορά το ξέρω, δεν θα βασανίσω τον εαυτό μου όπως έγινε αυτή τη φορά! (σιγά σιγά μαθαίνω τις τεχνικές..). Αν δεν παίζει αυτό το CPC δεν πειράζει, θα το έχω για spare parts ήδη πήρα το QWERTY πληκτρολόγιο και αντικατέστησα το AZERTY που είχα που μου έσπαγε τα νεύρα... και με το M4 board βάζω ένα εναλλακτικό Lower ROM και παίζει τέλεια!
If you can see a black border and grey screen the Z80, CRTC and the Gate Array are mostly OK.
To have this screen, the Z80 managed to read the ROM and configure the CTRC. If not you would only get a black screen.
However, it likely a RAM access problem.
In a 6128, you need the following to access the RAM :
- the PAL
- the Gate array (which does all the multiplexing
- the data buffers (IC114 / IC115)
- and ... the RAM
If you have a doubt on the PAL, you can remove it and close LK5/LK6 (above the PAL) and LK8 (at top of the main DRAM bank). This will put your 6128 into a 464 configuration. Since you have the RAM on socket, you better remove the second bank to be sure they will not interfere with the main one while their are not controlled anymore. The second bank is on the left side, away from the PAL
You can also test it in another 6128 if you have one.
If you have a XMEM or LowerROM board, you can also run my memory test : http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/quick-and-dirty-ram-test-for-cpc