Bitmap multicolor mode of TMS

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Door PingPong

Prophet (3754)

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19-07-2021, 13:17

Hi, from what we known as Bitmap Multicolor Mode here:
http://www.unige.ch/medecine/nouspikel/ti99/tms9918a.htm
i could not see the difference with the regular multicolor mode .

Is this mode supported on openMSX?

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Van PingPong

Prophet (3754)

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19-07-2021, 15:00

I've tryed in openMSX and i get a full white area , except the border

Van Manuel

Ascended (18077)

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19-07-2021, 17:45

Which VDP were you emulating?

Van PingPong

Prophet (3754)

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19-07-2021, 19:21

Manuel wrote:

Which VDP were you emulating?

V9938. Are those modes supported?

Van PingPong

Prophet (3754)

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20-07-2021, 09:11

v9938

Van Metalion

Paragon (1422)

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20-07-2021, 11:03

PingPong wrote:

Hi, from what we known as Bitmap Multicolor Mode here:
http://www.unige.ch/medecine/nouspikel/ti99/tms9918a.htm
i could not see the difference with the regular multicolor mode .

Is this mode supported on openMSX?

It's not a new mode, it's just the regular tile mode where all the 3 banks are filled with tiles in their numerical order.
. bank 1 filled with tiles 0-255
. bank 2 filled with tiles 0-255
. bank 3 filled with tiles 0-255
And of course, the same is done on the color banks.

This allows to draw everything you want, everywhere on the screen.
Hence the use of the "bitmap" name.

Van gdx

Enlighted (4629)

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20-07-2021, 11:25

Can you put a link to you program test?

Van PingPong

Prophet (3754)

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20-07-2021, 15:43

gdx wrote:

Can you put a link to you program test?

Quote:

10 SCREEN 2
20 COLOR 1,2,14:CLS
30 LINE (0,0)-(100,100),1
40 VDP(1)=VDP(1)OR8
50 T$=INPUT$(1)

i know it is not a new mode. there can be only 8 different mode combinations on TMS vdp, and we already seen every possible configuration.
Just asking why i could not get a bitmap mode of 40x24 in three sections like some docs say on internet.
In this mode i should also have sprite sub system enabled

Van PingPong

Prophet (3754)

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20-07-2021, 15:45

Metalion wrote:

And of course, the same is done on the color banks.

no color banks here, no color at all. the doc i've found on internet say that there is no attribute table, colors work like in text mode, from vdp(7)

Van PingPong

Prophet (3754)

afbeelding van PingPong

21-07-2021, 09:09

Quote:

10 SCREEN 2
20 COLOR 1,2,14:CLS
30 LINE (0,0)-(100,100),1
40 VDP(1)=VDP(1)OR8
50 T$=INPUT$(1)

here is the source.
Can you type on a regular msx1 ?

Van gdx

Enlighted (4629)

afbeelding van gdx

21-07-2021, 10:26

I tested on the National CF-2700 MSX1 only.

OpenMSX:

Real Machine:

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