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base repository: GlasgowEmbedded/glasgow
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compare: d3c57ae52629
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  • 2 commits
  • 1 file changed
  • 1 contributor

Commits on Jul 22, 2020

  1. applet.memory.27x: increase default read latency to 500 ns.

    It seems like for some really old EPROMs, like NEC D2732D, 250 ns is
    not quite enough, and 500 ns would be safer.
    whitequark committed Jul 22, 2020

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Showing with 1 addition and 2 deletions.
  1. +1 −2 software/glasgow/applet/memory/_27x/__init__.py
3 changes: 1 addition & 2 deletions software/glasgow/applet/memory/_27x/__init__.py
Original file line number Diff line number Diff line change
@@ -94,7 +94,6 @@ async def read(self, address):
class Memory27xApplet(GlasgowApplet, name="memory-27x"):
logger = logging.getLogger(__name__)
help = "read 27/28-series parallel (E)EPROM memories"
preview = True
description = """
Read memories compatible with 27-series erasable read-only memory, such as Microchip 27C512,
Intel 27C256, or hundreds of other memories that typically have "27X" where X is a letter
@@ -112,7 +111,7 @@ def add_build_arguments(cls, parser, access):
access.add_pin_set_argument(parser, "d", width=range(1, 16), default=8)

parser.add_argument(
"--read-latency", metavar="LATENCY", type=int, default=250,
"--read-latency", metavar="LATENCY", type=int, default=500,
help="set read latency to LATENCY ns (default: %(default)s)")

def build(self, target, args):