How can I program the ZipGSx registers?
ZipChip GS Special Registers Ex ZIP Technology, 12 October 1990 Registers must be unlocked before they can be accessed (see $C05A). Locking them will re-enable the annunciators. Writing to any I/O location $C058-$C05F (whether registers are locked or unlocked) will reset delay in progress. $C058 R No operation $C058 W Write any value to force power-on/reset bit to COLD (forces next reset to restore ZIP registers to defaults/switch settings).
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