home *** CD-ROM | disk | FTP | other *** search
/ The Atari Compendium / The Atari Compendium (Toad Computers) (1994).iso / book / graphics / b38.gif < prev    next >
Graphics Interchange Format  |  1996-01-09  |  15KB  |  555x627  |  4-bit (3 colors)
Labels: text | diagram | screenshot | parallel | line | black and white
OCR: B.38 - Memory Map M M T F T T T 0 a 3 S T T 0 Location(s ) Size Type Meaning 0x00FFFA16 MFP-ST Vector Register. Bit 3 is set to 1 to indicate software End-of-Interrupt mode and O to indicate automatic End-of-Interrupt mode. 0x00FFFA18 OB MFP-ST Timer A Control Register. Interpret bits 3-0 as follows: Value Meaning 0000 Timer stop. 0001 Delay mode, divide by 4. 0010 Delay mode, divide by 10. 0011 Delay mode, divide by 16. 0100 Delay mode, divide by 50. 0101 Delay mode, divide by 64. 0110 Delay mode, divide by 100. 0111 Delay mode, divide by 200. 1000 Event count mode. 1xxx Pulse extension mode (as above). 0x00FFFA1.A OB MFP-ST Timer B Control Register (see Timer A). OxOOFFFA1C MFP-ST Timer C & D Control Register. Interpret bits 6-4 for Timer C and bits 2-0 for Timer D as follows: Value Meaning 000 Timer stop. 001 Delay mode, divide by 4. 010 Delay mode, divide by 10. 011 Delay mode, divide by 16. 100 Delay mode, divide by 50. 101 Delay mode, divide by 64. 110 Delay mode, divide by 100. 111 Delay mode, divide by 200. 0x00FFFA1E MFP-ST Timer A Data Register. 0x00F FFA20 MFP-ST Timer B Data Register. 0x00FFFA22 OB MFP-ST Timer C Data Register. 0x00F FFA24 OB MFP-ST Timer D Data Register. 0x00FFFA26 OB VO MFP-ST Sync Character Register.