Features

• AmigaA500/A500+ compatibility (in place of the original CPU),
• PLCC68-packaged MC68000, MC68HC000, MC68010 chip support,
• recommended chip version: MC68HC000 (not included),
• recommended Kickstart version: Kickstart 3.1,
• supported CPU clock speeds: 7,12,14,16,25,28,33,42,50 MHz,
• RAM expansion: industry standard SIMM72 (FPM/EDO) 1-8MB or 16-128MB, 50/60ns memory modules (not included),
• up to 12 MB FAST RAM,
• Amiga A600-compatible IDE controller ( required Kickstart >= 2.05 (37.350) ),
• SPI controller

RetroAmi edition

Benchmarks

• Amiga 500 (Custom Kickstart 3.1, MC68HC000FN16 CPU running @50MHz, scsi.device V46.0, MAPROM function enabled)
• MIPS: ~4.53
• Dhrystones: ~4341
• IDE transfer speeds: ~6.3MB/s (using IdeFix97 ~6.7MB/s)
• RAM transfer speeds: ~7.02MB/s

Software

The provided software facilitates user-inititated configuration changes via CLI command or additional WicherBootMenu module, allowing creation of custom Kickstart versions (with Remus program). WicherBootMenu can be accessed by holding down the left mouse button when turning on or rebooting your Amiga.

Wicher list of options
VERSION - display version information
STATUS - display actual Wicher config
LOAD - load config from a file
SAVE - save config to a file
CLK - change CPU clock speed
FASTMEM - (on/off) enables/disables FAST RAM
CFGRAM - automatic configuration of memory controller
IDE - (on/off) enables/disables IDE controller
SPI - (on/off) enables/disables SPI controller
RAS13 - (on/off) enables/disables support for additional memory banks in the SIMM module (two-sided modules).
BIGRAM - (on/off) enables/disables support for SIMM module 16MB-128MB
SLOWRAM - (on/off) enables/disables support Trapdoor RAM - 1.5 MB ($C00000)
OTHERRAM - (on/off) enables/disables support other ram - 1.5 MB ($A00000)
KICKRAM - (on/off) enables/disables support memory - 1 MB ($E00000 i $F00000)

Example: wicher clk=28 RAS13=on

Please note!!!

Not every CPU unit remains stable when overclocked (i.e. clocked with higher speeds than the one prescribed by its manufacturer).

Most SIMM72 memory modules should function correctly at 12-28 MHz clock speeds. However, not every unit will operate without errors at 33-50 MHz clock speeds.