This page allows you to set advanced parameters for the Custom Chipset.

Compatible Settings - removing the check will enable changing options on this page. It should be left checked, as the settings are for advanced users.

Battery Backed Up Read Time Clock

Configures the clock type used in the Amiga or a custom clock. The RF5C01A is used in the A1200.

CIA-A TOD Clock Source

These options allow changing the TOD (Time Of Day) clock source for CIA-A (Complex Interface Adapter A) chip.
The Amiga 500 used the Vertical Sync as signal for the real time clock, which is not precise. It is the default setting for compatibility reasons.

Chipset Features

CIA ROM Overlay - CIA/Gayle overlay emulation.
A1000 Boot RAM/ROM - This is enabled when 8/64K ROM is used in the A1000.
DF0: ID Hardware - No ID is used if DF0: is a 3.5" Double Density drive.
CD32 CD - Enable use of CD32 custom CD drive.
CD32 C2P - Enable use of CD32's Chunky to Planar graphics modes.
CD32 NVRAM - Enable use of CD32's Non-Volatile RAM for saving games etc.
CDTV CD - Enable use of the CDTV (Commodore Dynamic Total Vision) custom CD drive.
CDTV SRAM - Enable use of CDTV's Static RAM.
CDTV SRAM Expansion - Enable use of CDTV's Static RAM expansion.
A600/A1200 IDE - Enable use of the Amiga 600 or 1200 internal IDE port.
A4000/A4000T IDE - Enable use of the Amiga 4000 or 4000T internal IDE port(s).
CDTV-CR - CDTV Cost Reduced or MkII clone (never publicly released).
ROM Mirror (E0) - 1 MB ROM image support.
ROM Mirror (A8) - 2 MB ROM image support.
PCMCIA - Enable use of PCMCIA port featured on the A600/A1200. Useful for external memory, storage and other uses.
KB Reset Warning - Keyboard reset warning.
No-EHB Denise - No Extra Half Bright mode on Denise chip found on A1000.
C00000 is Fast RAM - Forces memory address into Fast RAM area.
CIA TOD Bug - Emulate the Complex Interface Adapter (CIA) Time of Day bug.
Z3 Autoconfig - Enable Zorro3 Autoconfiguration.
A1000 Agnus (8361/8367) - A1000's Agnus chip (looks after Chip access to CPU and other chips), it includes blitter and copper.
1MB Chip / 0.5M+0.5M - Enable 1MB Chip RAM made of two 512KB chips.
Custom register byte write bug - Enable a custom register byte write bug feature.
Composite color burst - Enable composite color burst to update colors.
Toshiba Gary - Optional Toshiba Gary (Gate Array) slow (chip ram like) Z2 IO.Gary looks after bus control and functions for floppy drivers.
KS ROM has Chip RAM speed Set speed of Kickstart ROM to Chip RAM speed.
CIA 391078-01 - Enable Complex Interface Adapter 391078-01 chip which has a bug in IO port output mode, reading output mode port will always read output mode data state.
Unmapped address space - Set unmapped address space to Floating, all zeros or all ones.

Internal SCSI Hardware

A3000 WD33C93 SCSI - Emulate the A3000 Western Digital 33C93 SCSI controller.
A4000T NCR53C710 SCSI - Emulate the A4000T NCR 53C710 SCSI controller.
CDTV WD33C93 SCSI - Enable the CDTV Western Digital 33C93 SCSI controller.

Chipset Revision

Ramsey revision - Specify the specific version of the Ramsey chip (default is 0F). This is the gate array Dynamic-static RAM controller.
Fat Gary revision - Specify the specific version of the Fat Gary chip (default is 00). This is the gate array system address decoding chip.
Agnus/Alice revision - Specify the specific version of the Agnus/Alice chip (default is 21).
Denise/Lisa revision - Specify the specific version of the Denise/Lisa chip (default is F). This is the graphics chip.

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