Problem NMS-8245 2+, black screen

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By Caliostro

Expert (74)

Caliostro's picture

13-06-2021, 15:40

I tried many times, I only see random colors, 1 color each reset .... I tried cbios MSX1 again and it worked a few times after reset, message "ERROR: MEMORY NOT FOUND" but the memory is all working, what should I check ?
[img][/img]

By Caliostro

Expert (74)

Caliostro's picture

13-06-2021, 17:27

Diagnostic rom
[img][/img]
do you have the pdf for the diagnostic cartridge? i can't find that pdf anywhere

By Alexey

Guardian (3115)

Alexey's picture

13-06-2021, 18:13

Error 211 means that there's no ram at C000-FFFF. Are you sure you have at least 64kb of good RAM available? Try inserting a RAM expansion into slot 1.

By Caliostro

Expert (74)

Caliostro's picture

13-06-2021, 19:00

I have no ram expansions, the installed ram is 128k, if installed in another MSX, it works fine ... I have other ram modules, I installed them, but it doesn't work .... I tried the diagnostic rom on 8220 2+ and it doesn't work ... I don't understand how it worked on 8245

By Jipe

Paragon (1488)

Jipe's picture

14-06-2021, 10:27

the diagnostic rom ( test cartridge 4822 397 30138) is for VG8235/00/02/19 or NMS8250/00/16/19 this models have not the gate array M60003A but classics IC
NMS8220 and NMS8245 have the gate array inside
on the wiki exist another Service cartridge Philips Spare number 4822 397 30121
see here : https://www.generation-msx.nl/company/philips/345/hardware/

try make a 64k ram cartridge for testing your msx
https://www.raphnet-tech.com/products/msx_64k_ram_expansion/...

By Caliostro

Expert (74)

Caliostro's picture

14-06-2021, 10:26

ok thanks ...

By Jipe

Paragon (1488)

Jipe's picture

14-06-2021, 10:28

i edit the post Wink

By Caliostro

Expert (74)

Caliostro's picture

14-06-2021, 12:00

the 64k in the expansion, do I exclude the internal 128k?

By gdx

Enlighted (4479)

gdx's picture

14-06-2021, 12:18

The RAM is detected as described on the wiki page below.

https://www.msx.org/wiki/The_Memory

So if you insert a expansion in a lower slot, it will be select as main RAM.

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