H5 A3 JUMPERS

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exxos
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H5 A3 JUMPERS

Post by exxos »

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

RAM.PNG
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ROM BANK SELECT

ROM.PNG
ROM.PNG (19.18 KiB) Viewed 3794 times

BLITTER
JP15, JP16 both linked when no blitter is installed.
blt.PNG
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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.
ROM.PNG
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FLOPPY DS HD MODE SELECT
Note you have to have the floppy GAL installed to use these modes.
144.PNG
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FLOPPY GAL 8&16Mhz SELECT
Note you have to have the floppy GAL installed to use 16MHz modes.
1772.PNG
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16MHz GAL JUMPER
Not yet tested! If not fitting the 16MHz OSC, you can jumper SJ13 to feed 16MHz from the shifter instead.
sj13.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

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.
mono.PNG
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Re: H5 A3 JUMPERS

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JP5 SOUND DECODER ENABLE

Default = Linked for GLUE decoding.
jp5.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

JP17 DRIVE AB SWAP
ab.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

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.
JP9.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

JP2 & JP22 BLANKING SELECTS

Default setting is indicated by a line between jumper pins.
JP22.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

JP14 FLASHY CLOCK

The highlighted middle pins are to be wire linked if flashy clock is not used.
jp14.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

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".

SJ1.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

JP20 KEYBOARD LED SELECT

jp20.PNG
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Re: H5 A3 JUMPERS

Post by exxos »

JP3 MIDI SOUND OUTPUTS

DO NOT JUMPER. RESERVED FOR FUTURE USE.

jp3.PNG
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