Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-04 17:38:08 +03:00
Code Issues Actions 36 Packages Projects Releases Wiki Activity

apple3: disable the VIAs in Apple II mode. [Paul Hagstrom, R. Belmont]

Browse Source
This commit is contained in:
arbee 2021-07-18 19:50:33 -04:00
parent 51888262b7
commit 3509215e4e
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/mame/machine/apple3.cpp
View File

@ -633,6 +633,7 @@ void apple3_state::apple3_via_0_out_b(uint8_t data)
void apple3_state::apple3_via_1_out_a(uint8_t data) void apple3_state::apple3_via_1_out_a(uint8_t data)
{ {
printf("via 1 out: A2 mode %02x\n", data & 0x40);
apple3_via_out(&m_via_1_a, data); apple3_via_out(&m_via_1_a, data);
} }
@ -901,11 +902,11 @@ uint8_t apple3_state::apple3_memory_r(offs_t offset)
{ {
rv = m_bank7wr[offset - 0xf000]; rv = m_bank7wr[offset - 0xf000];
} }
else if (offset >= 0xffd0 && offset <= 0xffdf) else if ((offset >= 0xffd0 && offset <= 0xffdf) && (m_via_1_a & 0x40))
{ {
rv = m_via[0]->read(offset); rv = m_via[0]->read(offset);
} }
else if (offset >= 0xffe0 && offset <= 0xffef) else if ((offset >= 0xffe0 && offset <= 0xffef) && (m_via_1_a & 0x40))
{ {
rv = m_via[1]->read(offset); rv = m_via[1]->read(offset);
} }
@ -1059,14 +1060,14 @@ void apple3_state::apple3_memory_w(offs_t offset, uint8_t data)
m_bank7wr[offset - 0xf000] = data; m_bank7wr[offset - 0xf000] = data;
} }
} }
else if (offset >= 0xffd0 && offset <= 0xffdf) else if ((offset >= 0xffd0 && offset <= 0xffdf) && (m_via_1_a & 0x40))
{ {
if (!machine().side_effects_disabled()) if (!machine().side_effects_disabled())
{ {
m_via[0]->write(offset, data); m_via[0]->write(offset, data);
} }
} }
else if (offset >= 0xffe0 && offset <= 0xffef) else if ((offset >= 0xffe0 && offset <= 0xffef) && (m_via_1_a & 0x40))
{ {
if (!machine().side_effects_disabled()) if (!machine().side_effects_disabled())
{ {