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ti99: Added debug read.

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This commit is contained in:
Michael Zapf 2016-08-31 15:05:37 +02:00
parent 5cc832da59
commit fc262685f6
2 changed files with 24 additions and 0 deletions
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21
src/devices/bus/ti99_peb/ti_fdc.cpp
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@ -113,8 +113,27 @@ SETADDRESS_DBIN_MEMBER( ti_fdc_device::setaddress_dbin )
operate_ready_line();
}
/*
Access for debugger. This is a stripped-down version of the
main methods below. We only allow ROM access.
*/
void ti_fdc_device::debug_read(offs_t offset, UINT8* value)
{
if (((offset & m_select_mask)==m_select_value) && m_selected)
{
if ((offset & 0x1ff1)!=0x1ff0)
*value = m_dsrrom[offset & 0x1fff];
}
}
READ8Z_MEMBER(ti_fdc_device::readz)
{
if (space.debugger_access())
{
debug_read(offset, value);
return;
}
if (m_inDsrArea && m_selected)
{
// Read ports of 1771 are mapped to 5FF0,2,4,6: 0101 1111 1111 0xx0
@ -150,6 +169,8 @@ READ8Z_MEMBER(ti_fdc_device::readz)
WRITE8_MEMBER(ti_fdc_device::write)
{
if (space.debugger_access()) return;
if (m_inDsrArea && m_selected)
{
// Write ports of 1771 are mapped to 5FF8,A,C,E: 0101 1111 1111 1xx0

3
src/devices/bus/ti99_peb/ti_fdc.h
View File

@ -47,6 +47,9 @@ protected:
void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
// For debugger access
void debug_read(offs_t offset, UINT8* value);
// Wait state logic
void operate_ready_line();