CompuServe Messages

Ian, You write: >consider >a 68020 at 14 MHz, like the a1200, is equivalent to a 28MHz 68000. However, the SupraTurbo 28 MZ 68000 accelerator that I have seems to have performance numbers that are much better than the A1200 (14Mz 68EC20). This is using Lamonte Koop's AIBB 6.1. This is accomplished by having a special on-board cache for the 68000. Couldn't beat the price either. <G> For example: AIBBLogFile **************************************************************************** System Static Data —————————————————————————- System CPU: 68000 System FPU: NONE System MMU: NONE CPU Clock Rate: 28.0 MHz FPU Clock Rate: ——– Operating System Version: 37.175 ( 2.x ) ======================= System Memory Information ========================== NODE #1 Node Name: expansion memory Node Size: 4.00 MBytes Bus Port Size: 16 Bit Address Range: $00200000–$00600000 Node Priority: 0 —————————————————————————- NODE #2 Node Name: expansion memory Node Size: 2.00 MBytes Bus Port Size: 16 Bit Address Range: $00600000–$00800000 Node Priority: 0 —————————————————————————- NODE #3 Node Name: chip memory Node Size: 2.00 MBytes Bus Port Size: 16 Bit Address Range: $00000400–$00200000 Node Priority: -10 —————————————————————————- ************************************************************************* ** ========================== Test Information Section ======================== Test Name: EmuTest Parameters: 68000 based standard code Multitasking: DISABLED Test Code Location: Memory Node #1 Test Data Location: Memory Node #1 Test Result: 4.26 simulated MHz (Higher = Better Performance) ============================ Comparison Ratings ============================ This Machine : 3.09 A2000_FU : 1.00 (68000 | SC Math) Base System A1200-NF : 1.82 (68000 | SC Math) A3000-25 : 5.03 (68000 | SC Math) A2000_FT : 3.08 (68000 | SC Math) ————— System Dynamic Information for this test ——————- Instruction Cache: ——– Data Cache: ——– Inst Cache Burst Mode: ——– Data Cache Burst Mode: ——– Data Cache Write Allocate: ——– ————————————————————————- — System Supervisor Stack Address: $00200A08 AIBB Process Stack Address: $002C98B4 Operating System Memory Location: $00F80000 Current OS Dispatch Quantum: 4 *************************************************************************** END OF LOG FILE John G. Ata Sterling, VA