Main Index Routine Index Memory Index Previous Page Next Page $1C00: Data Port B (SYNC, Motors, Bit Rates, LED) +----------+---------------------------------------------------+ | Bit 7 | 0 = SYNC found | | Bits 6-5 | Bit rates (*): | | | 00 = 250000 Bit/s 01 = 266667 Bit/s | | | 10 = 285714 Bit/s 11 = 307692 Bit/s | | Bit 4 | Write Protect Sense: 1 = On | | Bit 3 | Drive LED: 1 = On | | Bit 2 | Drive Motor: 1 = On | | Bit 1-0 | Step motor for head movement: | | | Sequence 00/01/10/11/00... moves inwards | | | Sequence 00/11/10/01/00... moves outwards | +----------+---------------------------------------------------+ (*) Usually used: %11 for Tracks 1-17 %10 for Tracks 18-24 %01 for Tracks 25-30 %00 for Tracks 31-35 --- Information taken from AAY1541 - http://www.the-dreams.de ---- RapidLok-Reference: STA $1C00 : $0405 STA $1C00 : $050A LDA $1C00 : $0567 LDA $1C00 : $061D LDX $1C00 : $06C2 STA $1C00 : $06D2 LDA $1C00 : $06DF STA $1C00 : $06E8 LDA $1C00 : $069E LDA $1C00 : $0726 Previous Page / Next Page