Jumper configuration for the Retrowiki (REV1) Board version
Use a 20/24 pin ATX psu or an original A1000 psu with your A1100.
CAUTION: Test your A1000 psu with a volt meter before using it to avoid damage if its faulty.
NOTE: Don’t ever connect both connectors at once!
You can use your amiga keyboard (using the ctrl-amiga-amiga combination) to switch on/off the ATX psu. This is the preferred method for ATX psu in A1000 case.
You can also use an ATX style wired tactile switch with a non-A1000 case. See LED/PWR_SW in the right hand side.
VGA output selector (J300-303)
Left = Scandoubler output (31KHz)
Right = Denise direct output (15KHz)
The scandoubler is the recommended usage as it compatible with all amiga software in modern monitors
Scandoubler clock setup (J700)
Must be connected to the left position to work properly
Internal audio (INT AUDIO – CN102)
Connect your sound card output here. Central pin is GND
External Drive swap (J252-J253)
Both jumpers horiz = swap (external drive is DF0:, internal drive is DF1:)
Both jumpers vertical = normal
Use the SWAP position to use an external drive or gotek-like drive as your boot drive
TOD CIA source (TOD – J251)
Right (NORM) – signal comes from Agnus
Left (PSU) – signal comes from PSU (only for working, original, A1000 psu. NOT ATX)
The right (NORM) option is standard for all amigas. If unsure leave this in the NORM position
Light Pen port selection (LPEN – J403)
Right – Lpen connected to port 0 (Mouse)
Left – Lpen connected to port 1 (Joystick)
If unsure leave this opened
Alternative Keyboard input (CN51)
Use this for a A500 keyboard or a keyboard adapter such as an usb-keyboard adapter.
Agnus LPEN pin rework (J404)
Can be connected (left) to LPEN to work. It is left open to allow most VBB agnus to work.
See (rework for rare agnus to work)
If unsure leave this opened
VBB agnus (J406)
Close = VBB agnus mode
Open = Normal (Non-VBB) agnus mode
Use this jumper to match YOUR Agnus chip. VBB Agnus chips are marked “VBB” but you can check the version using the CBM part number too
Base clock setup (J405)
Must be connected to left side to work properly
Base clock selector (J500)
Must be connected to left side to work properly
ROM type selector (J200)
Right = use FLASH, 2x 32 pin chip sockets
Left = use standard A500/600/2000 kickstart chip socket
NOTE: Standard, single chip (A500/A600/A2000) kickstart may NOT detect on-board fast ram and/or the IDE controller. Specifically, 2.05 or highr version is needed for the IDE controller to be detected in the system.
If you can burn a custom kickstart image to a 40 Pin eprom, use an A1200 kickstart to achieve best results
Big ROM selector J201 (only for non-standard 1MByte images in ROM)
Right = Boot from high part of the ROM (higher image for dual-image mode)
Open = Boot from lower part of the ROM (lower image for dual-image mode)
Left = Boot from lower, use full 1 Mbyte addressing (for single big rom image)
Floppy power CN1
Connect internal floppy power here
There an alternate 4 pin power connector in the board at CN3. Both connectors provide the same power and can be used the same
Small Addressing (J203)
Disable both on-board fast-ram and 32 bits addressing
You usually don’t need to use this jumper because the board disables the 32 bit addressing for motherboard resources when an accelerator board cpu takes over.
SDRAM clock (J451)
Must be soldered to left to work properly
Internal Floppy Led Connection (J50)
Connect your case led here to show floppy activity
Power Led Connection (LED – J250)
Connect your case led here to show Power status
ATX Power Switch (PWR_SW – J1)
Connect an optional tactile switch to switch on/off the ATX power
Appendix A. A1100 TV Video Connector
TV video connector
Provides 15KHz output regardless of the scandoubler. It has additional pins to the original spec to provide higher quality YC output for retro equipment
| A1000 | A1100 | ATARI 8 bit | |
| 1 | NC | Y (luma) | Luma |
| 2 | GND | GND | GND |
| 3 | Audio – L | Audio – L | Audio |
| 4 | Composite | CVBS (composite) | Composite |
| 5 | GND | C (chroma) | Chroma |
| 6 | NC | NC | – |
| 7 | +12V (for modulator) | +12V | – |
| 8 | Audio – R | Audio – R | – |
I believe that both original cables and atari 800/XE cables should work but a carefully checked cable is a must.
CAUTION: Keep signals away from 12V