NTSC/PAL: Raspberry Pi, An Apple 2 & an AppleColor A2M6021X

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NTSC/PAL: Raspberry Pi, An Apple 2 & an AppleColor A2M6021X

Postby ajross on Thu Dec 11, 2014 8:27 am

I have an Apple //e Platinum 128k with an NZ bought A2M6021X AppleColor Composite display.

Coming from the UK originally I'm aware of the nuances that begat Apple in the early days around PAL.

Effectively I am wanting to re-create David Schmenk's setup:
https://www.youtube.com/watch?v=wZSLrq5 ... ZZzydgqMWV

He is using a2pi on his Raspberry Pi to take the keystrokes from the real Apple2. He then connects the Raspberry Pi to the AppleColor composite display to allow it to display brilliant colour and effectively stealths the operation of a IIGS on the //e using the Rpi. Neat set up, but my AppleColor when plugged into the RPI is just mono.

I set /boot/config.txt to force NTSC mode but I don't see any difference. If I plug this into a normal composite display (I have a Samsung SyncMaster 940MG monitor with composite in), it displays in colour as it should, so I'm thinking it's the monitor. Here's my /boot/config.txt if you have knowledge of the Rpi and can shed any light.

Thanks in advance to anyone who can help!

Alistair

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment for composite PAL
# 0 = ntsc, 1 = japanese ntsc, 2=pal, 3=brazilian pal
#sdtv_mode=2
sdtv_mode=0

#colour enable (0) or disable (1)
sdtv_colourburst=0

#aspect ratio 1 - 4:3, 2 - 14:9, 3-16:9
sdtv_aspect=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
disable_overscan=0

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border

#ajr: apple2 composite monitor friendly vals below
overscan_left=20
overscan_right=40
overscan_top=-100
overscan_bottom=30


# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4


#uncomment to overclock the arm. 700 MHz is the default.
arm_freq=800

# for more options see http://elinux.org/RPi_config.txt
ajross
 
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Joined: Sat Jan 19, 2013 7:49 am
Location: Auckland

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