Mercurial > repos > blastem
annotate svp_util.c @ 1925:039553703c20
Don't apply address and cd register changes to the 'live' registers until pending flag is cleared, but do preserve the upper address bits in the latch. Fixes regression in Overdrive 2 while preserving fix to Mona in 344 bytes
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 13 Apr 2020 20:43:25 -0700 |
parents | ca158bc091f9 |
children |
rev | line source |
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1620
a172f97d873f
Add the ability for a CPU definition to reference arbitrary C includes and use it to add a placeholder definition of svp_read_16
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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1 |
1621
ca158bc091f9
Implement program ROM reads
Michael Pavone <pavone@retrodev.com>
parents:
1620
diff
changeset
|
2 void svp_prog_read_16(svp_context *context) |
1620
a172f97d873f
Add the ability for a CPU definition to reference arbitrary C includes and use it to add a placeholder definition of svp_read_16
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
3 { |
1621
ca158bc091f9
Implement program ROM reads
Michael Pavone <pavone@retrodev.com>
parents:
1620
diff
changeset
|
4 uint16_t address = context->scratch1 >> 1; |
ca158bc091f9
Implement program ROM reads
Michael Pavone <pavone@retrodev.com>
parents:
1620
diff
changeset
|
5 context->scratch1 = context->rom[address]; |
1620
a172f97d873f
Add the ability for a CPU definition to reference arbitrary C includes and use it to add a placeholder definition of svp_read_16
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
6 } |