mirror of
https://github.com/keirf/greaseweazle-firmware.git
synced 2025-10-31 11:06:44 -07:00
67 lines
1.2 KiB
Plaintext
67 lines
1.2 KiB
Plaintext
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Debug Console:
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--------------
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USART1: (Rx:DMA1/5, Tx:DMA1/4)
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PA9 TX
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PA10 RX
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USB:
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----
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PA11 USB_DM
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PA12 USB_DP
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GPIO: (GPI_float, GPO_pushpull)
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PA0 (connect via 1.5kohm to PA12/USB_DP)
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Floppy:
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-------
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GPIn: (GPI_float, active low)
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PB6 8: IDX
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PB7 26: TRK0
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PB8 28: WRPROT
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GPOut: (GPO_opendrain or GPO_pushpull)
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PB9 2: DENSEL
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PB10 12: SEL_A
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PB11 16: MTR_A
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PB12 18: DIR
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PB13 20: STEP
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PB14 24: DKWE
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PB15 32: SIDE
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TimerIn: (GPI_float, active low)
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PB3 30: DKRD (Timer2/2, CC2:DMA1/7)
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TimerOut: (AFO_opendrain or AFO_pushpull)
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PB4 22: DKWD (Timer3/1, UP:DMA1/3)
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Unused Pins:
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------------
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All to be pulled high:
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PA1-8,13-15
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PB0-2,5
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PC0-15
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Floppy bus connections:
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-----------------------
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Inputs: Pull to 5v via 1k.
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Outputs: Drive open-collector 2N3904, 1k base resistor.
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IBM/PC 34-pin Floppy Host Interface:
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------------------------------------
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2: -> DENSEL(5.25: HIGH=360rpm/high-density, LOW=300rpm, low-density)
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3: missing/key
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4: n/c
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6: n/c
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8: <- INDEX
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10: -> MTR_B
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12: -> SEL_A
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14: -> SEL_B
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16: -> MTR_A
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18: -> DIR
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20: -> STEP
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22: -> DKWD
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24: -> DKWE
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26: <- TRK0
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28: <- WRPROT
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30: <- DKRD
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32: -> SIDE
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34: <- DSKCHG / RDY(5.25)
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All odd pins are ground.
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