exxos's Atari, Amiga & retro forum

RAM SIZE SELECT
Can force the RAM to the selected amount.



ROM BANK SELECT


BLITTER
JP15, JP16 both linked when no blitter is installed.


ROM DECODING SELECT
Default is linked to enable ROM to decode TOS104 as normal.
Use the right pad only to drive ROM CE externally for TOS206 etc.


FLOPPY DS HD MODE SELECT
Note you have to have the floppy GAL installed to use these modes.



FLOPPY GAL 8&16Mhz SELECT
Note you have to have the floppy GAL installed to use 16MHz modes.


16MHz GAL JUMPER
Not yet tested! If not fitting the 16MHz OSC, you can jumper SJ13 to feed 16MHz from the shifter instead.

MONO / COLOUR SELECT

FIX PINS 2&3 need to be soldered together on the bottom of the PCB..

1&2 OPEN = AUTO / RGB MODE
1&2 CLOSED = FORCE MONO MODE

NOTE: Pin3 (also soldered to pin2) is connected to the MONO pin as normal on the RGB socket. So plugging in a MONO minitor will auto switch to MONO mode as standard operation.

JP5 SOUND DECODER ENABLE

Default = Linked for GLUE decoding.

JP17 DRIVE AB SWAP

JP9 HSYNC SELECT

Closed = GLUE HSYNC enabled.
Open = Reserved for future use with the HDMI shifter.

VSYNC pad = Reserved for future use with the HDMI shifter.

JP2 & JP22 BLANKING SELECTS

Default setting is indicated by a line between jumper pins.

JP14 FLASHY CLOCK

The highlighted middle pins are to be wire linked if flashy clock is not used.

SJ1 KEYBOARD ERROR CLICK ON / OFF

By default, when the keyboard is not connected you get a constant key clicking sound, basically indicating you forgot to plug it in normally! I actually think this is a useful thing to have, but others think this is incorrect and it should not do that. So if you are one of those people, you can disable that "feature".

JP20 KEYBOARD LED SELECT

JP3 MIDI SOUND OUTPUTS

DO NOT JUMPER. RESERVED FOR FUTURE USE.