We have an LED marquee (LED-Laufschrift) that we are trying to reverse engineer and to do fun stuff with it.
- Chip: TMP68HC11A0T
- EPROM: M27C64A-15F
- Dimensions: 7 rows, 60 columns
We extracted the EPROM using a programmer that is compatible with minipro.
minipro -p "M27C64A@DIP28" -r eprom.bin
The eprom.s19 and eprom.intel files were produced with the help of SRecord:
srec_cat eeprom.bin -binary -o eprom.s19
srec_cat eeprom.bin -binary -o eprom.intel -intel
eprom.dis was obtained using the DHC11 disassembler.
As of now, this is the very first attempt, so the disassembly might contain errors -
e.g. not yet taking vectors into account
(see the DHC11 tutorial for details on how to do that).
The DHC11 output was the following:
