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AT NVR: The ability to lock reading of a register in preparation of the WD7C610 rewrite.

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OBattler
2024-02-02 05:30:11 +01:00
parent a8f250b6c9
commit 91ca927618
1 changed files with 3 additions and 2 deletions
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5
src/nvr_at.c
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@@ -692,7 +692,7 @@ nvr_read(uint16_t addr, void *priv)
{ {
nvr_t *nvr = (nvr_t *) priv; nvr_t *nvr = (nvr_t *) priv;
const local_t *local = (local_t *) nvr->data; const local_t *local = (local_t *) nvr->data;
uint8_t ret; uint8_t ret = 0xff;
uint8_t addr_id = (addr & 0x0e) >> 1; uint8_t addr_id = (addr & 0x0e) >> 1;
uint16_t i; uint16_t i;
uint16_t checksum = 0x0000; uint16_t checksum = 0x0000;
@@ -810,7 +810,8 @@ nvr_read(uint16_t addr, void *priv)
break; break;
default: default:
ret = nvr->regs[local->addr[addr_id]]; if (!(local->lock[local->addr[addr_id]] & 0x02))
ret = nvr->regs[local->addr[addr_id]];
break; break;
} }
else { else {