I don't know if this is any help but, here is what I dug up on it.
Detecting a SuperCPU
With the knowledge we have gained so far we are able to write programs that are 100% compatible to CMD's accelerator board and even can benefit from the presence of a SuperCPU. If you want to let your program "know" whether it is executed by a SuperCPU or a plain Commodore system, this can be done in a simple way: Just check whether bit 7 of $D0BC (a special SuperCPU register) is zero. A plain C64 always returns a one, like every read from an I/O address that is not used. But on a SuperCPU, this bit is zero - thus giving us the possibility to easily detect a SuperCPU. Once detected, we are able to select alternative routines for SuperCPU owners, or even use full SuperCPU only programs which could take advantage of all the powerful new opcodes and addressing modes the 65816 offers.
This was found on
this web siteImportant SuperCPU Memory Locations
$D074 1 (53364) - VIC Bank 2/GEOS Optimization (mirror $8000-$BFFF)
$D075 1 (53365) - VIC Bank1 Optimization (mirror $4000-$7FFF)
$D076 1 (53366) - BASIC Optimization (mirror $0400-$07FF)
$D077 1 (53367) - No Optimization (mirror all memory) (V1 Default)
$D07A 2 (53370) - Software Speed Select - Normal (1 MHZ or 2 MHZ in 128 Fast mode)
$D07B 3 (53371) - Software Speed Select - Turbo (20 MHZ) (* $D079)
$D07E 2 (53374) - Hardware Register Enable
$D07F 2 (53375) - Hardware Register Disable (* $D07D)
$D0B0 6 (53424) - SuperCPU Mode Detect Register
00xxxxxx - SuperCPU V2 in 128 mode
01xxxxxx - SuperCPU V2 in 64 mode
11xxxxxx - SuperCPU V1, No SuperCPU or SuperCPU disabled.
$D0B2 4 (53426) - Bit 7: Hardware Register Enable Flag (1=Enabled)
- Bit 6: System 1 MHZ Flag (1=Enabled)
$D0B3 3,7 (53427) - Enhanced Optimization Register (V2 Only)
00xxx1BZ - VIC Bank 0, $0000-$3FFFF
01xxx0B0 - VIC Bank 1, $4000-$7FFFF
00xxx0B0 - VIC Bank 2/GEOS, $8000-$BFFF
01xxx1B0 - VIC Bank 3, $C000-$FFFF
10xxx0B0 - BASIC Opt., $0400-$07FF
11xxx00Z - No Opt. All Mem., $0:0000-$1:FFFF (V2 deafult)
11xxx1BZ - No Opt. per Bank, $0000-$FFFF
10xxx100 - Full Optimization (no mirroring of any memory)
$D0B4 5 (53428) - Bits 7 & 6: Optimization Mode Flags:
00xxxxxx - VIC Bank2/GEOS Optimization Enabled
01xxxxxx - VIC Bank 1 Optimization Enabled
10xxxxxx - BASIC Optimization Enabled
11xxxxxx - No Optimization
$D0B5 6 (53429) - Bit 7: JiffyDOS Switch Flag (1=Enabled)
Bit 6: Speed Switch Flag (1=Normal, 0=Turbo)
$D0B6 6 (53430) - Bit 7: Processor Emulation Mode Flag (1=Emulation)
Bit 6: Reset Switch Flag (1=Switch Pressed)(V1 only)
$D0B8 4 (53432) - Bit 7: Software Speed Flag (1=Normal, 0=Turbo)
Bit 6: Master Speed Flag (1=Normal via any source)
$D0BC 6 (53436) - Bit 7: DOS Extension Mode Flag (1=Enabled)
Bit 6: RAMLink Hardware Register Flag (1=Enabled)
$D200 - $D2FF 4 - System Ram (53760 - 54015)
$D300 - $D3FF 5 - User RAM (available for user programs) (54016 - 54271)
Notes:
1 Write only, hardware registers must be enabled to activate location.
2 Write only, active with hardware registers enabled or disabled.
3 Write only, active with hardware registers enabled or disabled, but does not override hardware Speed switch.
4 Read only with hardware registers disabled, Read/Write with hardware registers enabled, write access reserved for system use only.
5 Read only with hardware registers disabled, Read/Write with hardware registers enabled.
6 Read only with hardware registers enabled or disabled (write with hardware registers enabled has no effect).
7 Changing values in this area affects all other optimization mode registers, and changing other
optimization mode registers affect this location. The B flag assigns control of this register to a specific
Commodore 128 Bank (0=Bank 0, 1=Bank 1), while the Z flag controls mirroring of Zero Page and Stack memory
($0000-$01ff)(0=mirroring on, 1=mirroring off). The default for Z is 1, B is 0.
* Denotes a duplicate register location.
IMPORTANT NOTE: Enabling the SuperCPU hardware registers also causes some changes in the Kernal ROM memory map ($E000-$FFFF).
To avoid problems, do not leave the hardware registers enabled any longer than necessary.
Also, note that mirroring of I/O is always performed when I/O is mapped in.
