psx.wiki
Log in
Main page
Hardware
Hardware tests
System software
SDKs
File formats
Games
Tools
History
All pages
page
view source
history
View source for SPU Memory Transfer
← SPU Memory Transfer
You do not have permission to edit this page.
Log in
to edit.
--- title: SPU Memory Transfer type: test summary: Checks sound RAM access through the data port and DMA channel 4. category: Hardware tests info: Machine = SCPH-5501 info: Program = spu/memory-transfer (ps1-tests) --- ## Overview The program writes the data transfer control register at 1F801DACh and reads it back, writes sound RAM through the data port and checks that SPUSTAT bit 10 clears, and moves a test string to and from sound RAM by [DMA](/hardware/dma/) channel 4. It times a DMA write and a DMA read against a window the test sets, runs both in sync mode 0, and checks that the transfer mode bits of SPUCNT appear in SPUSTAT.[^src] ## Results The SCPH-5501 passed all 9 checks in every run.[^run] The data transfer control register read back every value written. The string came back intact by DMA in both directions, and both transfers finished within the test's timing window. DMA in sync mode 0 completed in both directions, and the SPUCNT transfer mode bits appeared in SPUSTAT.[^run] ## Runs ### 25 September 2026 [09SPU.txt](/tests/raw/20260925T0000Z-5501a-card-main/main/09SPU.txt) ``` ===== 09 SPU SPU TRANSFER | BIOS 19951204 System ROM Version 3.0 11/18/96 A spu/memory-transfer Test SPU memory access using DMA and regular IO. pass - testDtcRegister pass - testManualWriteToSpuRam pass - testDMAReadFromSpuRam pass - testDMAWriteToSpuRam pass - testDMAWriteTiming pass - testDMAReadTiming pass - testDMAWriteToRamSyncMode0 pass - testDMAReadToRamSyncMode0 pass - testControlBitsAreCopiedToStatusRegister Done. ``` ### 27 September 2026 [09SPU.txt](/tests/raw/20260927T0000Z-5501a-card-2/main/s024/09SPU.txt) ``` ===== 09 SPU SPU TRANSFER | BIOS 19951204 System ROM Version 3.0 11/18/96 A spu/memory-transfer Test SPU memory access using DMA and regular IO. pass - testDtcRegister pass - testManualWriteToSpuRam pass - testDMAReadFromSpuRam pass - testDMAWriteToSpuRam pass - testDMAWriteTiming pass - testDMAReadTiming pass - testDMAWriteToRamSyncMode0 pass - testDMAReadToRamSyncMode0 pass - testControlBitsAreCopiedToStatusRegister Done. ``` ### 27 September 2026 run 2 [09SPU.txt](/tests/raw/20260927T0000Z-5501a-card-b/main/s034/09SPU.txt) ``` ===== 09 SPU SPU TRANSFER | BIOS 19951204 System ROM Version 3.0 11/18/96 A spu/memory-transfer Test SPU memory access using DMA and regular IO. pass - testDtcRegister pass - testManualWriteToSpuRam pass - testDMAReadFromSpuRam pass - testDMAWriteToSpuRam pass - testDMAWriteTiming pass - testDMAReadTiming pass - testDMAWriteToRamSyncMode0 pass - testDMAReadToRamSyncMode0 pass - testControlBitsAreCopiedToStatusRegister Done. ``` ### 27 September 2026 run 3 [09SPU.txt](/tests/raw/20260927T0000Z-5501a-card-g/main/09SPU.txt) ``` ===== 09 SPU SPU TRANSFER | BIOS 19951204 System ROM Version 3.0 11/18/96 A spu/memory-transfer Test SPU memory access using DMA and regular IO. pass - testDtcRegister pass - testManualWriteToSpuRam pass - testDMAReadFromSpuRam pass - testDMAWriteToSpuRam pass - testDMAWriteTiming pass - testDMAReadTiming pass - testDMAWriteToRamSyncMode0 pass - testDMAReadToRamSyncMode0 pass - testControlBitsAreCopiedToStatusRegister Done. ``` ### 27 September 2026 run 4 [09SPU.txt](/tests/raw/20260927T0000Z-5501a-card-g3/main/09SPU.txt) ``` ===== 09 SPU SPU TRANSFER | BIOS 19951204 System ROM Version 3.0 11/18/96 A spu/memory-transfer Test SPU memory access using DMA and regular IO. pass - testDtcRegister pass - testManualWriteToSpuRam pass - testDMAReadFromSpuRam pass - testDMAWriteToSpuRam pass - testDMAWriteTiming pass - testDMAReadTiming pass - testDMAWriteToRamSyncMode0 pass - testDMAReadToRamSyncMode0 pass - testControlBitsAreCopiedToStatusRegister Done. ``` ### 28 September 2026 [09SPU.txt](/tests/raw/20260928T0000Z-5501a-card-h/main/09SPU.txt) ``` ===== 09 SPU SPU TRANSFER | BIOS 19951204 System ROM Version 3.0 11/18/96 A spu/memory-transfer Test SPU memory access using DMA and regular IO. pass - testDtcRegister pass - testManualWriteToSpuRam pass - testDMAReadFromSpuRam pass - testDMAWriteToSpuRam pass - testDMAWriteTiming pass - testDMAReadTiming pass - testDMAWriteToRamSyncMode0 pass - testDMAReadToRamSyncMode0 pass - testControlBitsAreCopiedToStatusRegister Done. ``` ## References [^src]: ps1-tests, spu/memory-transfer. https://github.com/JaCzekanski/ps1-tests. [^run]: SCPH-5501 output: [main/09SPU.txt](/tests/raw/20260925T0000Z-5501a-card-main/main/09SPU.txt) and the files beside it, with the other runs listed under Runs.