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author Nigel Barnes <Pernod70@users.noreply.github.com>2019-03-10 13:23:23 +0000
committer Nigel Barnes <Pernod70@users.noreply.github.com>2019-03-10 16:03:40 +0000
commit09f698ddc8f1e0ee0196f1069a3dc44a2e13b863 (patch)
treee69a6c2cad7b96856c35f4ecd4a933a7957dd609 /src/devices/bus/spectrum/usource.cpp
parentd62970843f793810da8a8bf245f00eed5c611d5c (diff)
spectrum: Improved expansion interface to allow devices to act on opcode fetches.
- Added Multiface One/128/3, and MultiPrint devices.
Diffstat (limited to 'src/devices/bus/spectrum/usource.cpp')
-rw-r--r--src/devices/bus/spectrum/usource.cpp13
1 files changed, 6 insertions, 7 deletions
diff --git a/src/devices/bus/spectrum/usource.cpp b/src/devices/bus/spectrum/usource.cpp
index 7ec405857c9..13f302b14c5 100644
--- a/src/devices/bus/spectrum/usource.cpp
+++ b/src/devices/bus/spectrum/usource.cpp
@@ -60,6 +60,7 @@ spectrum_usource_device::spectrum_usource_device(const machine_config &mconfig,
void spectrum_usource_device::device_start()
{
+ save_item(NAME(m_romcs));
}
@@ -82,17 +83,15 @@ READ_LINE_MEMBER(spectrum_usource_device::romcs)
return m_romcs;
}
-
-uint8_t spectrum_usource_device::mreq_r(offs_t offset)
+void spectrum_usource_device::opcode_fetch(offs_t offset)
{
- uint8_t data;
-
if (!machine().side_effects_disabled() && (offset == 0x2bae))
{
m_romcs = !m_romcs;
}
+}
- data = m_rom->base()[offset & 0x1fff];
-
- return data;
+uint8_t spectrum_usource_device::mreq_r(offs_t offset)
+{
+ return m_rom->base()[offset & 0x1fff];
}