Atari 1040STE, Field Service Manual

Page: 46 / 81

41
3.21.8 DMA
D0 Time–out. DMA did not take place, or interrupt not detected.
D1 DMA Count Error. Not all bytes arrived. Possible Memory Controller or
GSTMCU error.
D2 Data Mismatch Error.
D3 DMA Controller not responding.
3.21.9 Timing
T0
MFP timers failed.
T1 Vertical sync timing failed.
T2 Horizontal sync failed.
T3 Display Enable Interrupt failed.
T4 Memory Controller video address counter failed.
T5 PSG Bus test. PSG chip is causing a bus error by staying on the data bus too
long.
T6 1772 Bus test. 1772 chip is causing a bus error by staying on the data bus too
long.
3.21.10 Floppy Disk Drive
F0
Drive offline. Not responding to restore (seek track 0).
F1 Format error. The message will say 'error writing' (or reading) and display
the specific error found.
F2 Error Writing. Gives specific error found.
F3 Error Reading. Gives specific error found.
F4 Seek error.
F5 Write protected.
F6 Data compare. Data read not equal to data written.
F7 DMA error.
F8 DMA count error (GSTMCU).
F9 CRC error.
FA Record not found.
FB Lost data.
FC Side select error.
FD Drive not ready. Timed–out performing the command.