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ZXHawk: +3/+2a writes to 0x1ffd and 0x7ffd decoded more faithfully

This commit is contained in:
Asnivor 2018-08-20 17:24:14 +01:00
parent 6a5b77c338
commit 7ff4cea6c7
2 changed files with 4 additions and 4 deletions
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4
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ZXSpectrum128KPlus2a/ZX128Plus2a.Port.cs
View File

@ -75,7 +75,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
AYDevice.WritePort(port, value);
// port 0x7ffd - hardware should only respond when bits 1 & 15 are reset and bit 14 is set
if (port == 0x7ffd)
if (!portBits[1] && !portBits[15] && portBits[14])
{
if (!PagingDisabled)
{
@ -95,7 +95,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
}
}
// port 0x1ffd - hardware should only respond when bits 1, 13, 14 & 15 are reset and bit 12 is set
if (port == 0x1ffd)
if (!portBits[1] && portBits[12] && !portBits[13] && !portBits[14] && !portBits[15])
{
if (!PagingDisabled)
{

4
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ZXSpectrum128KPlus3/ZX128Plus3.Port.cs
View File

@ -81,7 +81,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
UPDDiskDevice.WritePort(port, value);
// port 0x7ffd - hardware should only respond when bits 1 & 15 are reset and bit 14 is set
if (port == 0x7ffd)
if (!portBits[1] && !portBits[15] && portBits[14])
{
if (!PagingDisabled)
{
@ -101,7 +101,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
}
}
// port 0x1ffd - hardware should only respond when bits 1, 13, 14 & 15 are reset and bit 12 is set
if (port == 0x1ffd)
if (!portBits[1] && portBits[12] && !portBits[13] && !portBits[14] && !portBits[15])
{
if (!PagingDisabled)
{