cdtv rom's

[voyager]

Yes it works normal ;-) and yes it looks like it's a OTP, but the question remains can i stil use eproms if I switch the 2 pin's ?

32KB, A friend of my lookt in his eprom database and the bigest one he could find with 28 pin's was a 32KB prom Any bigger it would have 32 pins. But it seems we where wrong ;-)

REF 2.2.1 mainboard

391009-01 u34 / u35
(c) 1991 CBMV1.0
321BPCL6 000
1G1 Japan

 

[karsten]

the question remains can i stil use eproms if I switch the 2 pin's ?

I see no problems I have something similiar to a 27c1001 and Rev 2.2.1 and it works fine

32KB, A friend of my lookt in his eprom database and the bigest one he could find with 28 pin's was a 32KB prom Any bigger it would have 32 pins. But it seems we where wrong ;-)

You are not wrong, with PROMs you can have 32KB, but this 28 pin ones are no PROMs, those are unprogrammable ROMs, therefore less pins are needed.

[voyager]

Switching pin 2 and 24 works, I now have v2.3 roms ! and upgraded the kickroms to 2.05. Up to the scsi controller and the 8mb memory expansion.

Thank you all.

[alexh]

FYI v2.3 is actually v2.30 (thirty).

Toni Wilen (WinUAE) also mentioned that if there is no floppy disk plugged in that the CDTV will "red screen" on boot, can you confirm this?

[voyager]

Yes the screen will be red if no ffd is found.

[jimbo100]

Lucky I have a floppy, now just need to get hold of some 2.30 roms. :-D

[voyager]

If you send me a set of proms I can program them for you.