Hello, has anyone here ever done a ROM dump of the keyboard controller of the Amiga? The controller is, on most Amigas, a 6570-036. This one looks a lot like the 6500/1 Microcontroller MOS offered back then. It's, of course, based on the 6502 that's why I thought it appropriate to ask here. Datasheet here: http://www.6502.org/documents/datasheets/mos/mos_6500-1_one-chip_microcomputer_oct_1986.pdf This Microcontroller has a test feature where you supply +10V to the RESET pin and from then on all memory fetches happen not from the internal ROM but from Port PC. According to the datasheet this will allow you to load a small program into the internal RAM (64 Bytes) that can, once RESET returns to +5V, dump the ROM to another port. Anyone here ever built such a circuit? Writing the program would be interesting since you have no address lines but only have to make sure that the correct byte is present on Port PC in the next cycle (external clock is divided by 2). Gerrit Message was sent through the cbm-hackers mailing listReceived on 2014-06-09 12:00:03
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