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boards:ecb:ramfloppy:start [2019/09/23 21:54]
b1ackmai1er [Version]
boards:ecb:ramfloppy:start [2019/12/21 10:43] (current)
b1ackmai1er [Description of the block diagram]
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 ====== Description of the block diagram ====== ====== Description of the block diagram ======
  
-The maximum storage capacity of the ECB board ECB-RAMF 11 is 4 MB, but each of the 8 SRAM IC 512kByte must be equipped on the PCB. Addressing the 4 MB is calculated in the BIOS of the CPM80 from the given data by sector and track. The logic sector size of CP/M 2.2 is 128Byte, the physical sector size of ECB-RAMF 11 is 512 Byte. These data are converted in exactly the information that is pre-loaded into the address counter as the starting address. The counter done thereby completely the byte addressing within a sector, the sector address and the track addressing. The following chart shows how the address in the address space of 4 Mbytes of SRAM composed resulting from the calculated data passed by the BIOS. This figure applies to the assignment of 128Byte/Sektor.+The maximum storage capacity of the ECB board ECB-RAMF 11 is 4 MB, but each of the 8 SRAM IC 512kByte must be equipped on the PCB. Addressing the 4 MB is calculated in the BIOS of the CPM80 from the given data by sector and track. The logic sector size of CP/M 2.2 is 128Byte, the physical sector size of ECB-RAMF 11 is 512 Byte. These data are converted in exactly the information that is pre-loaded into the address counter as the starting address. The counter done thereby completely the byte addressing within a sector, the sector address and the track addressing. The following chart shows how the address in the address space of 4 Mbytes of SRAM composed resulting from the calculated data passed by the BIOS. This figure applies to the assignment of 128Byte/Sector.
  
 | \\  {{:​boards:​ecb:​ramfloppy:​fig_42.jpg?​nolink&​453x222|fig_42.jpg}}| | \\  {{:​boards:​ecb:​ramfloppy:​fig_42.jpg?​nolink&​453x222|fig_42.jpg}}|
  
-<font 9px/​inherit;;​inherit;;​inherit>​adress-calculation of ECB-RAMF R11</​font>​+<font 9px/​inherit;;​inherit;;​inherit>​address-calculation of ECB-RAMF R11</​font>​
  
 Byte-Counter Byte Address (0…511 in IC12) Byte-Counter Byte Address (0…511 in IC12)
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 SecTrk-high Sector Track Address high (IC11) SecTrk-high Sector Track Address high (IC11)
 +
 +\\
 +
  
 ====== Electronic of ECB-RAMF ====== ====== Electronic of ECB-RAMF ======
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 |23|IC15|DIP-8-300|1|TLC7705D| |23|IC15|DIP-8-300|1|TLC7705D|
 |24|IC14|DIP-16-300|1|74HCT138 (must be 74HCT)| |24|IC14|DIP-16-300|1|74HCT138 (must be 74HCT)|
-|25|IC23|DIP-8-300|1|ATTINY13-20PU|+|25|IC23|DIP-8-300|1|ATTINY13-20PU ​or ATTINY13A|
 |26|JP1|SIL-3|1|JUMPER3| |26|JP1|SIL-3|1|JUMPER3|
 |27| |Socket DIP32 8pc|8|Precision type| |27| |Socket DIP32 8pc|8|Precision type|
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 |0|0|1|0|0|1|90H|Preferred for EF9366 VDU board| |0|0|1|0|0|1|90H|Preferred for EF9366 VDU board|
 |1|0|1|0|0|0|A0H|Preferred for ECB-RAMF R11 #1| |1|0|1|0|0|0|A0H|Preferred for ECB-RAMF R11 #1|
-|1|0|1|1|0|1|A4H|Preferred for ECB-RAMF R11 #2|+|1|0|1|0|0|1|A4H|Preferred for ECB-RAMF R11 #2|
 |1|1|0|0|0|0|C0H|Preferred for ECB-ModPrn R0.2 #1 / #2| |1|1|0|0|0|0|C0H|Preferred for ECB-ModPrn R0.2 #1 / #2|
 |1|1|0|1|0|0|D0H|Preferred for ECB-PIO or EF9366 VDU| |1|1|0|1|0|0|D0H|Preferred for ECB-PIO or EF9366 VDU|
boards/ecb/ramfloppy/start.1569290040.txt.gz · Last modified: 2019/09/23 21:54 by b1ackmai1er
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