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annotate svp_util.c @ 1925:039553703c20

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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>
date Mon, 13 Apr 2020 20:43:25 -0700
parents ca158bc091f9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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 }