Wiki editing discussion

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Van gdx

Enlighted (4628)

afbeelding van gdx

09-03-2021, 02:26

According the diagram below the Wavy 77 seems to have MSX-Write in the primary slot 2 (it is not extended) and it can be disabled by switch.

http://elec-junker-p2.blog.jp/archives/2185676.html

It's weird that Sanyo didn't put MSX-Write in slot 3-1 or 3-2.

If I had this MSX, I would reverse MSX-Write with the cartridge slot B, and I would try to update MSX-Write to the version 2.

Van sdsnatcher73

Prophet (2143)

afbeelding van sdsnatcher73

09-03-2021, 07:09

Okay that diagram also shows the ROM is disabled directly through OE pin.

Van sdsnatcher73

Prophet (2143)

afbeelding van sdsnatcher73

18-03-2021, 06:37

About S1985. It seems ASCII updated the design of the printing on the package at some point. The photo on the wiki page shows a different design than the S3527. However the photo of the PHC-77 mainboard as well as the HB-F900 sow a design similar to the S3527. I don’t know if it also was a revised internally.

The HB-F900:

The PHC-77:

Van Meits

Scribe (6432)

afbeelding van Meits

24-03-2021, 11:48

A while ago a sold MSX gear for a friend of mine. I still have all the pictures. A wiki editor might want to browse around and see if they can find a suitable image.
http://meits.nl/files/index.php?dir=msx/w/
(both sub folders contain images as well, both different images of same items and other items.)

Van gdx

Enlighted (4628)

afbeelding van gdx

26-03-2021, 02:00

About the page wiki below some documentations say that accesses are faster when display the screen is disabled, when sprites are disabled or during VBlank. What about in practice? Does anyone has more precise info?

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

Van NYYRIKKI

Enlighted (5837)

afbeelding van NYYRIKKI

26-03-2021, 04:42

gdx wrote:

About the page wiki below some documentations say that accesses are faster when display the screen is disabled, when sprites are disabled or during VBlank. What about in practice? Does anyone has more precise info?

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

Yes... In theory... I've already mentioned that the VRAM can be accessed "full speed" while VDP is drawing border or the screen output has been disabled. Disabling sprites is pure V99x8 thing and on all modes that display sprites can anyway accessed full speed, so it does not really matter if the sprites are on or off... To internal 2D acceleration this does have an effect, but here I was trying to cover only CPU <-> VRAM traffic. (Maybe that should be more clearly stated?)

There also has been some speculation/rumors that on TMS chip access times could be improved by placing sprites on line 208, but at least I don't have any information about this that would closely enough sound like fact.

Van Manuel

Ascended (18077)

afbeelding van Manuel

26-03-2021, 07:52

Van gdx

Enlighted (4628)

afbeelding van gdx

26-03-2021, 08:45

Manuel wrote:

might be relevant?

This is great but I would like the wiki to be less theoretical and more focused on programming with examples in assembler.

Van mars2000you

Enlighted (5954)

afbeelding van mars2000you

01-04-2021, 14:15

@msxholder: the technical details about the Yamaha SX-100 cartridge slot are in the Specifications part, please don't put them in the general description of the machine.

Van mars2000you

Enlighted (5954)

afbeelding van mars2000you

05-04-2021, 15:43

@gdx: Please respect my attempts for a visually good looking page (Panasonic FS-A1GT)

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