OSWORD &30
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&30 48 Read PRISMA interrupt status Prisma On exit: XY?0 = Event 32 enable status XY?1 = Upper screen status XY?2 = Base screen status XY?3 = Lower screen status XY?4 = Window overlay status XY?5 = Roller screen enable status This call returns the current booking status of the various routines executed by the PRISMA-3 on every field sync interrupt. Each byte is returned as zero if the associated routine is not booked, and returned as non-zero if the routine is booked.
PRISMA calls
- OSWORD &28 Read PRISMA information table
- OSWORD &29 Read PRISMA pixel value
- OSWORD &2A Read PRISMA logical screen size
- OSWORD &2B Read PRISMA colour palette
- OSWORD &2C Send VDU sequence direct to PRISMA
- OSWORD &2D Read last two PRISMA graphics cursors
- OSWORD &2E Read PRISMA base screen visible origin
- OSWORD &2F Read PRISMA graphics origin
- OSWORD &30 Read PRISMA interrupt status
- OSWORD &31 Direct call to PRISMA command
- OSWORD &32 Read position of PRISMA-3 roller screen
- OSWORD &33 Read/Write PRISMA overlay or nonvolatile memory