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cuda.c: add delay to setting of SR_INT bit

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MacOS 9 is racy when it comes to accessing the shift register. Fix this by
introducing a small delay between data accesses and raising the SR_INT
interrupt bit.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Mark Cave-Ayland 2015-11-11 22:49:51 +00:00 • committed by David Gibson
parent a53cfdcca2
commit cffc331a31
2 changed files with 36 additions and 11 deletions
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3
hw/ppc/mac.h
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@ -103,6 +103,9 @@ typedef struct CUDAState {
uint8_t last_b;
uint8_t last_acr;
/* MacOS 9 is racy and requires a delay upon setting the SR_INT bit */
QEMUTimer *sr_delay_timer;
int data_in_size;
int data_in_index;
int data_out_index;