Search found 105 matches
- Mon Feb 07, 2022 6:34 am
- Forum: Astrobe for FPGA RISC5
- Topic: Register R13
- Replies: 2
- Views: 14153
Re: Register R13
Thanks for the pointers. I don't have intention to change the compiler to use R13, but I am grinding my teeth on an in-circuit debugger, and an otherwise unused register could be handy from assembly code.
- Fri Feb 04, 2022 9:13 am
- Forum: Astrobe for FPGA RISC5
- Topic: Register R13
- Replies: 2
- Views: 14153
Register R13
ORG.incR allocates registers up to R11. R12 is MT, R14 is SP, and R15 is LNK. What about R13, may I use it, or does it have a special purpose as well?
- Fri Feb 04, 2022 9:07 am
- Forum: Astrobe for FPGA RISC5
- Topic: SYSTEM.LDREG
- Replies: 4
- Views: 92618
SYSTEM.LDREG
The Astrobe RISC5 compiler creates erroneous code in the following case: PROCEDURE P; VAR i: INTEGER; BEGIN i := 0; SYSTEM.LDREG(i, 13) END P; The procedure compiles without error message, but the code created is: 4400000DH MOV r4, r0, 13 Evidently, the target register number must be a constant, as ...
- Tue Jan 18, 2022 1:08 pm
- Forum: Astrobe for FPGA RISC5
- Topic: RISC5 Oberon Compiler Source Code
- Replies: 1
- Views: 14138
Re: RISC5 Oberon Compiler Source Code
Wow. Thanks! Also for CPIde.
- Sat Jan 15, 2022 8:01 am
- Forum: Astrobe for FPGA RISC5
- Topic: Spurious Imports
- Replies: 5
- Views: 18250
Re: Spurious Imports
Thanks! The indirectly imported modules do count as regards the max allowed 15 imported modules, which we can check in the BL opcode of an external procedure call, where the module number is encoded in a 4 bit value (hence the restriction of 15, zero is not a valid module number for BL instructions)...
- Sat Jan 01, 2022 9:53 am
- Forum: Astrobe for FPGA RISC5
- Topic: Spurious Imports
- Replies: 5
- Views: 18250
Re: Spurious Imports
OK, thanks, I have read up. Does the Astrobe compiler more or less work like the Project Oberon one in that area? In particular the import and export of symbols (reading and writing of symbol files, ORB. Import and ORB.Export) and creating object files (ORG.Close)? The way the symbol table is built ...
- Thu Dec 30, 2021 11:39 am
- Forum: Astrobe for FPGA RISC5
- Topic: Spurious Imports
- Replies: 5
- Views: 18250
Spurious Imports
In the process of debugging an inexplicable error during the system start-up sequence I started to look into 'rsc' files (yes, I know), namely the list of imported modules. I have realised that the list of imports in the 'rsc' files sometimes contains additional modules that are not in the IMPORT li...
- Thu Oct 28, 2021 5:21 am
- Forum: Astrobe for FPGA RISC5
- Topic: System.Date (v8.0)
- Replies: 1
- Views: 13214
Re: System.Date (v8.0)
Checking for the correctness of the date and time actually set is also useful as we actually can set the clock even with incorrect parameters. Here are two example cases with incorrect parameters where the clock gets set nonetheless. Typos happen. :( System.Date 28 10 n21 10 20 30 System.Date 28 10 ...
- Mon Oct 25, 2021 9:19 am
- Forum: Astrobe for FPGA RISC5
- Topic: System.Date (v8.0)
- Replies: 1
- Views: 13214
System.Date (v8.0)
The new System.Date procedure in v8.0: PROCEDURE Date*; (* ... *) BEGIN (* ... *) IF S.class = Texts.Int THEN (*set clock*) (* ... *) IF (day >= 1) & (day <= 31) & (mo >= 1) & (mo <= 12) & (yr >= 0) & (yr <= 63) THEN dt := ((((yr*16 + mo)*32 + day)*32 + hr)*64 + min)*64 + sec; Kernel.SetClock(dt) EN...
- Mon Oct 25, 2021 8:31 am
- Forum: Astrobe for FPGA RISC5
- Topic: ASSERT & Error.Mod (version 8.0)
- Replies: 1
- Views: 12984
ASSERT & Error.Mod (version 8.0)
Astrobe for RISC v8.0 provides a new module Error.Mod. It is used, for example, in Math.Mod: PROCEDURE Sqrt*(x: REAL): REAL; (* ... *) BEGIN ASSERT(x >= 0.0, Error.input); (* ... *) END Sqrt; That is, to provide an error code for ASSERT via a second parameter (which could be any integer value, does ...