I would like to turn on in cp / m plus the graphic mode 1 in asm.

[funkheld]

Hi good afternoon.
I would like to turn on in cp / m plus the graphic mode 1 in asm.
how is that possible?


Thank you.
greeting

[AMSDOS]

Hi good afternoon.
I would like to turn on in cp / m plus the graphic mode 1 in asm.
how is that possible?


Thank you.
greeting

GSX would be the standard method to get into Mode 1 by using DDMODE1, there's information about it on John Elliott's website, though I don't know how it's accessed from Assembly.

[HAL6128]

There's a description in the wiki in how to access the firmware (set mode) in CP/M:
http://www.cpcwiki.eu/index.php/Programming:Executing_firmware_functions_from_within_CP/M_2.1_or_CP/M_plus
Have a try...

[AMSDOS]

Not sure if this will work because I'm interpreting it from a bit of Turbo Pascal code, though from the looks of it, it appears BDOS Function 4 followed by number representing mode will give that Screen Mode, but I'm not sure.


If I've interpreted it correctly it should look like this:

Code Select Expand


ld c,4
ld e,1
call 5


[GUNHED]

Use control characters, ESC 2 1 as I remember, see CPC Manual ;-)

[funkheld]

Hello, thanks.
CP/M PLUS and GRAFIK-DEMO.

ASM : PASMO

CP/M PLUS (MODE, PLOT) :

Code Select Expand


org &100


scr_set_mode equ &bc0e
plot_absolute equ &bbea


ld hl,(&0001)
ld de,&0057
add hl,de
ld (firm_jump+1),hl


jp start
ret


start
ld a,2
call firm_jump
defw scr_set_mode


ld de,100
ld hl,100
call firm_jump
defw plot_absolute
ret


firm_jump
jp 0





CP/M PLUS (MODE, PLOT, DRAW) :

Code Select Expand


org &100


scr_set_mode equ &bc0e
plot_absolute equ &bbea
gra_line_absolute  equ &bbf6


ld hl,(&0001)
ld de,&0057
add hl,de
ld (firm_jump+1),hl


jp start
ret


start
ld a,2
call firm_jump
defw scr_set_mode


ld de,50
ld hl,100
call firm_jump
defw plot_absolute


ld de,200
ld hl,70
call firm_jump
defw gra_line_absolute
ret


firm_jump
jp 0


greeting