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- Thi≤ librar∙ contain≤ threσ program≤ tha⌠ ╔ havσ founΣ ì
- helpfu∞ iε usinτ thσ Micromin⌠ SB180FX« Therσ arσ tw∩ problem≤ ì
- whicΦ concerε thσ usσ oµ RA═ disk¼ anΣ thσ stabilit∙ thereof« ì
- Micromin⌠ ha≤ stateΣ tha⌠ therσ i≤ n∩ guarenteσ oµ preservatioε ì
- oµ content≤ oµ RA═ disδ acros≤ ß hardwarσ reset« Thσ F╪ addeΣ ß ì
- ver∙ largσ timσ constan⌠ t∩ thσ rese⌠ circuit¼ whicΦ almos⌠ ì
- guarentee≤ thσ los≤ oµ conten⌠ oµ thσ ram¼ duσ t∩ interruptioε oµ ì
- refresh« Oε m∙ board¼ ╔ wa≤ ablσ t∩ solvσ thi≤ probleφ b∙ ì
- changinτ thσ 1δ Mohφ resiste≥ a⌠ R1╖ t∩ ß 1░ Kohφ resitor« ì
- However¼ froφ timσ t∩ time¼ thσ systeφ wil∞ stil∞ losσ thσ ì
- refresh¼ anΣ corrup⌠ memor∙ (includinτ thσ raφ disk).
-
- M∙ solutioε t∩ thi≤ i≤ thσ se⌠ oµ program≤ CRTS╘ anΣ TSTDSK« ì
- Thσ CRTS╘ prograφ wil∞ writσ ß 1δ filσ t∩ thσ specifieΣ disδ witΦ ì
- ß predeterminΣ randoφ pattern« Thσ TSTDS╦ wil∞ reaΣ tha⌠ filσ oε ì
- thσ specifieΣ disk¼ anΣ repor⌠ differences« ╔ pu⌠ TSTDS╦ iε m∙ ì
- star⌠ alia≤ fo≥ eacΦ RA═ disk« ╔ follo≈ eacΦ MDINI╘ witΦ ß CRTS╘ ì
- fo≥ thσ samσ disk« Thi≤ seem≤ t∩ havσ saveΣ mσ oε somσ ì
- occasions.
-
- Thσ seconΣ probleφ i≤ tha⌠ thσ boo⌠ RO═ wil∞ destro∙ thσ ì
- firs⌠ tw∩ byte≤ oµ eacΦ banδ iε thσ lowe≥ addres≤ area« Thσ ì
- quicδ fi° fo≥ thi≤ i≤ thσ RAMFI╪ program¼ describeΣ below.
- ì
-
-
- Program: FIXRAM
-
- Purpose: The SB180FX Boot ROM destroys two bytes at the beginning
- of each of the banks of memory. Since these could be in
- the middle of a file, or a directory, ths is not a good
- situation. FIXRAM will examine each RAM disk configured
- on an XBIOS system. If this disk contains an area that
- is susceptible to such corruption, it will create a file
- named !!!!!RAM.BAD in user area 31. This file will have
- allocated to it all of the allocation groups that are subject
- to this corruption.
-
- Use: The FIXRAM program should be run each time the MDINIT utility
- is run. This will insure that the disk cannot contain
- corruptible areas. If a group is flagged as allocated in
- the FIXRAM report, it may mean that you have a directory
- group in a corruptible area. Add 1 to the number of tracks
- before directory for this disk to solve this problem.
-
- Cautions: This program creates the file by putting groups in a file
- control block, forcing a write to the FCB, and then closing
- the file. This technique works with ZRDOS17, but may fail
- with other DOSes. Check the operation of this technique on
- your system by running it and then using DU3 to make sure
- the allocated groups agree with the report from FIXRAM.
-
- Error: This program will flag the first group in the upper memory
- part of the RAM disk as being a candidate. It is not, but
- this is a small price to pay for such safety.
- è