MESS Apollo Issues

Apollo Emulation

• memory size is not configurable (currently fixed at 16MB for DN3500 resp. 8 MB for DN3000 and 32 MB for DN5500)
• netserver base directory is not configurable (currently hardcoded as <rompath>/apollo resp. apollo/roms/apollo)
• hard disk image file is hard to create (should provide cpdisk to make disk image files similar to /systest/ssr_util/cpflp, see also rwvol)
• German keyboard mapping is incomplete (ALT GR is ignored)
• the cartridge tape emulation won't trim the image file while writing to tape (i.e. a new or an empty ctape image file must be used to run wbak)
• the 3c505 emulation doesn't implement the operations 0xf8, 0xfa (not needed for SR10.2; may come from SR10.4 microcode)
• the network interface of the emulation is hardcoded to Ethernet interface eth0 of the Linux host

M68K Emulation

• M68K FPU is only partial implemented (fpu.dex will fail, sax -error c -only fpu will crash the emulation)
• M68040 MMU is only partially implemented (ex domain_os will crash with Segmentation fault for DN5500)

dex

• cpu.dex (run test with all Apollo Driver Configuration switches set to Off!)
  • cpu.dex Test 302 (SIO keyboard port test) will fail for DSP3x00 (behavior is ok, run test with option -nokb)
  • cpu.dex Test 604, 605 and 606 will fail for DN3000, if floppy disk has been accessed before (wrong DMA page register used)
  • interrupts not implemented for calendar MC146818 (simulated for DN3000 in driver/apollo.c)
  • cpu.dex Test 675 (IO Protect PGA Test) will fail (DN5500 only, I/O Protection Map is not implemented)
• ctape.dex
  • ctape.dex Test 190 (Write/Read/Verify Single Record) will fail on first pass for DN3000, if floppy disk has been accessed before (wrong DMA page register used)
• disp.dex
  • disp.dex Test 20 (Video SYNC Gen. Add. Test) will fail for monochrome displays (not implemented)
• ether.dex (test runs w/o errors, but log file has multiple entries)
  • pc=01041e90: ROM dword write to 00000000 = 08001e80 & ffffffff (seems to occur on real DN3500 as well)
• flp.dex
  • flp.dex Test 6, 8, 9 and 10 will fail for DN3000 as format has loaded the 1st byte from a wrong address (wrong DMA page register used)
• fpu.dex
  • fpu.dex will fail very often (TODO: add missing FPU operations and operands in src/emu/cpu/m68000/m68kfpu.c)
• mem.dex
  • mem.dex Test 140: Parity Checker Test (Testing the Failing Address Register) will fail (implementation won't allow more the 40 parity error tests)
• win.dex
  • win.dex Test 103: Format Bad Track Test will fail (not implemented)
  • win.dex Test 3/4/... (Format Disk) may fail for DN5500, retry will succeed (Badspot checksum error) - probably fbs has not been run on a new disk image

sax

• "/systest/sax -error c -only cpu" fails with: CPU is faster than expected (DN3000, Actual 2.1493 vs. 2.0000)
• "/systest/sax -error c -only cpu" fails with: CPU is slower than expected (DN3500, Actual 4.4285 vs. 4.5800)
• "/systest/sax -error c -only fpu" fails with some rounding errors (Single Precision Whetstone and Vector Instructions)
• "/systest/sax -error c -only fpu" will crash the emulation as FPU opmodes FATAN, FETOX and FSCALE are not yet implemented.