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-- card: 16756 from stack: in.0 -- bmap block id: 30961 -- flags: 0000 -- background id: 2805 -- name: IWM Registers ----- HyperTalk script ----- on opencard show background field 2 end opencard -- part 1 (button) -- low flags: 00 -- high flags: 0000 -- rect: left=234 top=69 right=236 bottom=268 -- title width / last selected line: 0 -- icon id / first selected line: 0 / 0 -- text alignment: 1 -- font id: 0 -- text size: 12 -- style flags: 0 -- line height: 16 -- part name: to drive connector ----- HyperTalk script ----- on mouseUp push card visual effect iris open go to card id 9590 end mouseUp -- part 2 (button) -- low flags: 00 -- high flags: 0000 -- rect: left=289 top=202 right=215 bottom=347 -- title width / last selected line: 0 -- icon id / first selected line: 0 / 0 -- text alignment: 1 -- font id: 0 -- text size: 12 -- style flags: 0 -- line height: 16 -- part name: cpu ----- HyperTalk script ----- on mouseUp push card visual effect wipe left go to card "scc" end mouseUp -- part 4 (button) -- low flags: 00 -- high flags: 0000 -- rect: left=370 top=122 right=135 bottom=410 -- title width / last selected line: 0 -- icon id / first selected line: 0 / 0 -- text alignment: 1 -- font id: 0 -- text size: 12 -- style flags: 0 -- line height: 16 -- part name: disk drives ----- HyperTalk script ----- on mouseUp push card visual effect wipe left go to card "internal floppy" end mouseUp -- part contents for background part 6 ----- text ----- Inside the IWM Chip -- part contents for background part 37 ----- text ----- The IWM is clocked by the 16 MHz signal which is twice the frequency used in the original Macintosh configuration. Thus, the internal software-selectable divide by two circuit is used to access 400K and 800K drives*. The IWM contains shift registers which convert between the serial bit stream of data from the disk drive and the 8-bit parallel data stream required by the MC68000*.