Hi folks, I'd welcome some guidance on troubleshooting a bus problem. The best tool to use it and how.
Background
I'm working with some of the guys on A1k to try to get the DSP working on the replica Amiga AA3000+ motherboard. (This is a modern remake of the AA3000 prototype that had a DSP3210 on it but was never released.) Bus control is managed through some GALs. As far as I can work out, bus arbitration works and the DSP is granted the bus but for reasons I don't understand a 68030-compliant address strobe is never generated by the GALs. Result: machine freezes waiting for a memory read that never happens. DSP clock is 50MHz btw.
Questions
I don't have an oscilloscope or a logic analyser. A LA seems to be the better tool for the task of really seeing what's going on before the hang but is £££. A 100MHz 2 channel digital scope would be cheaper, but gives you less info. Thoughts?
Even after sorting that out, I am concerned with attaching the probes to the motherboard. There are no useful attachment points that I can see. So only answer is to solder thin wires to the relevant tracks/pins. Not sure my soldering is up to that. Any alternatives?
Happy to add more detail, but that's the gist of the challenge! Would welcome any insights from the pros!
Guidance on troubleshooting a bus problem
Tool suggestions, soldering tips, general useful electronics knowhow.
Jump to
- GENERAL
- ↳ NEWS & ANNOUNCEMENTS
- ↳ INTRODUCE YOURSELF
- ↳ SHOW US YOUR COLLECTIONS
- ↳ CHAT FORUM PUBLIC
- ↳ MEMBER BLOGS
- ↳ ATARI MUSIC NETWORK
- ↳ ATARI FOR SALE & WANTED
- ↳ GENERAL FOR SALE & WANTED
- ↳ EXXOS WEBSTORE INFORMATION
- ↳ NOOB QUESTIONS
- ATARI LIBRARY
- ↳ MOTHERBOARD REVISIONS
- ↳ STE
- ↳ STF
- ↳ ST
- ↳ MEGA STE
- ↳ MEGA ST
- ↳ STFM
- ↳ 8 BIT
- ↳ TT
- ↳ Falcon 030
- ↳ STACY
- ↳ MAGAZINES
- ↳ BENCHMARKS
- ↳ 3D MODELS
- OTHER / GENERAL HARDWARE
- ↳ 8 BIT CORNER
- ↳ DISPLAYS & CONVERTERS
- ↳ ELECTRONICS
- ↳ MSX 8 BIT COMPUTER
- ↳ OTHER 680x0
- ↳ VINTAGE GEAR ZONE
- ATARI 16 / 32 BIT
- ↳ HARDWARE
- ↳ HARDWARE ISSUES
- ↳ HARDWARE DISCUSSIONS
- ↳ BOOSTERS
- ↳ SEC 64MHZ BOOSTER
- ↳ STE V1 SERIES 32MHz BOOSTER
- ↳ ST 16MHz V2.X SERIES BOOSTERS (Discontinued 2020)
- ↳ ST V1 16MHz BOOSTER (Discontinued 2015)
- ↳ ST 16MHz V1.5 BOOSTER (Discontinued 2015)
- ↳ STE V2 BOOSTER
- ↳ STE / MSTE 68020 booster
- ↳ EVERYTHING ELSE
- ↳ ST536 030 ST ACCELERATOR
- ↳ ST 16MHz BOOSTER 2021
- ↳ DSTB1 & DFB1 booster by BadWolf
- ↳ PSU (power supplies)
- ↳ RTC (Real time clock)
- ↳ FLOPPY DRIVES KITS & UPGRADES
- ↳ RAM UPGRADES
- ↳ ROM UPGRADES
- ↳ PeST MOUSE INTERFACE
- ↳ BLAST FROM THE PAST
- ↳ HARD DRIVES
- ↳ HARDWARE ESSENTIALS
- ↳ SOFTWARE
- ↳ STOS
- ↳ SOFTWARE PROGRAMMING & DISCUSSION
- ↳ GAME ZONE
- ↳ ATARI ST REMAKE PROJECT
- ↳ ALPHA DEVELOPMENT INFO
- ↳ ALPHA USER BUILDS
- ↳ H4 MONGREL EDITION DEVELOPMENT & INFO
- ↳ MONGREL H4 USER BUILDS
- ↳ FPGA DEVELOPMENT
- ↳ H5 Phoenix Platform Edition
- ↳ H5 A3 USER BUILDS
- ↳ H5 B1 USER BUILDS
- ↳ H5 C1 USER BUILDS
- ↳ LEGACY BOARD
- ↳ TWEAKS & FIXES
- ↳ BASIC TROUBLESHOOTING
- ↳ PHOENIX ZONE
- AMIGA
- ↳ Terriblefire's channel
- ↳ TF520 (OBSOLETE)
- ↳ TF530
- ↳ TF534 (OBSOLETE)
- ↳ TF328 (OBSOLETE)
- ↳ TF330
- ↳ DiagROM
- ↳ TF360
- ↳ TF536
- ↳ TF CD32 Riser
- ↳ TFMSX
- ↳ AMIGA HARDWARE HELP
- ↳ AMIGA MEMBER BLOGS
- ↳ AMIGA FOR SALE
- ↳ AMIGA SOFTWARE